Moving Mirror Goniophotometer Introduction

Moving Mirror Goniophotometer Introduction

Lisun LSG-2000 Moving Mirror Goniophotometer System adapts the solution of rotating mirror in the center, it is widely applied in road lamp, room lamp, spot lights, stage lights, Mining lamp, Automobile lamp, traffic signal lamp and LED lamp etc. all kinds of luminaries for light distribution performance(light distribution curve) measurement, it can also test total flux, luminaries efficiency for all types of lighting sources. It can realize CIEA-α，CIEB-β，CIEC-γ measurement solution with different software. The test result can be directly used as the input data of the international lighting design software, and comply with the requirements of CIE, IESNA and other international and domestic standards.

 

Lisun LSG-2000 Moving Mirror Goniophotometer System can test spatial luminous intensity distribution, luminance intensity data, zonal luminance flux, luminance efficiency, coefficient of Utilization, luminance limitation curves glare, maximum ratio of distance to height, efficient luminescence angle, upper luminous flux, lower luminous flux, available average illuminance curve, Isocandela diagrams etc. photometry parameters, and voltage, current, power, power factor etc. electrical parameters.

Accuracy of angle: Class A.f1’<3% (Standard Class) or Class L.f1’<1.5%.

C angle：1) Rotating Range: 0°~360°; 2) Angle accuracy: 0.1°; 3) Angular Resolution: 0.001°.

γ angle: 1) Rotating Range: -180°～180°; 2) Angle accuracy: 0.1°; 3) Angular Resolution: 0.001°.

 

This system has 3 rotating axis. Main axis drives the reflective mirror rotate around the center point, reflect the light of the lamp to the detector. At the same time, auxiliary axis reverse rotates synchronously, always keeps the lamp bracket in the vertical position, to ensure the test lamp in normal ignite position in the measurement process, and achieve the lamp in the main axis direction measurement.

 

Lisun LSG-2000 Moving Mirror Goniophotometer System can work with a CCD spectroradiometer with USB interface to test spatial CCT distribution and other spectral color parameters. The rotation motor is from Japan MITSUBISHI MOTORS to make the system rotate very smoothly and stably. And it uses Germanic Angle decode system to ensure the system accuracy. It adapts RS-232 standard interface, it can be connected to PC.

 

Lisun LSG-2000 Moving Mirror Goniophotometer System is widely applied to Luminaries manufacturing enterprise and lab, such as Sharp Electronics in Memphis TN(USA), CS TECH MEXICO, S.A. DE C.V. (Mexico), DORADO Praha s.r.o. (Poland) etc. The reason why Lisun can win some many customers is because we always practice the motto of right products, right price and right service. Lisun will continue feedback good quality products and superior service in the feature.

 

IP Waterproof and Dustproof Rating Test

IP Waterproof and Dustproof Rating Test

 

Purpose of the test: to assess the ability of the material to prevent solids and liquids from entering the external shell

Detection range: electrical and electronic equipment, automotive aircraft and other parts

 

IP level (waterproof and dustproof) definition

IP waterproof and dustproof, refers to the protection level of electrical equipment, in accordance with its ability of preventing external objects intrusion, waterproof, moisture-proof and dustproof characteristics to be graded. The external objects include tools, human fingers, etc. which are not accessible to the live parts of the lamp to avoid electric shock. IP protection level is composed of two figures, the first number represents the level of dustproof ability for lamps, and the ability of preventing foreign objects intrusion; the second number represents the level of anti moisture and water for lamps. The larger the number is, the higher the degree of protection is. For example, IPXX.

 

The IP rating system provides a method for classifying products by the levels of waterproof, dustproof and anti-collision for electrical equipment and packaging. This system is approved by most European countries and was announced in IED529 (BS EN 60529: 1992) External Packing Protection level (IP code).

 

The degree of protection is mostly followed IP by two numbers, and the numbers are used to clarify the level of protection. The first figure indicates the extent of the equipment against the dust, or the extent to which people are protected from harm in a sealed environment. The second figure indicates the waterproof level of the device.

 

0 No protection

1 Can withstand solid material with length is more than 50mm. For example, hands accidentally touch; can withstand the vertical drop of water.

2 Can withstand solid material with diameter is more than 12mm, and length is no longer than 80mm. For example, fingers; can withstand a direct injection of water at a vertical angle of 15 °.

3 Can withstand solid material with diameter is more than 2.5mm. For example, tools or wires; can withstand direct jetting of water at a vertical angle of 60 °.

4 Can withstand solid material with a diameter is more than 1.0mm. For example, small wires; can withstand water spray from any direction- allowing limited access.

5 Dustproof, limited access (no harmful deposits). Can withstand low pressure water jet from any direction - allowing limited access.

6 Dust is difficult to enter, completely dustproof. Can withstand strong water column jet from any direction - allowing limited access.

7 Allowing for putting into 0.15m-1m depth water for a short time which can be up to 30 minutes.

8 Can withstand long-term soaking under pressure.

High and low temperature test

In natural environment, temperature and humidity are two indivisible natural factors. Due to different geographical locations in different regions, the temperature and humidity effects generated are also different. This test is used to confirm the products’ adaptability during storage, transportation and usage in the climate of some certain temperature and humidity. Severe levels depend on the high / low temperature, humidity and the time of exposure.

High temperature test is introduced in detail: this test is used to determine the adaptability of the products to store, transport and use under the conditions of high temperature and climate. The severity of the test depends on the temperature of the high temperature and the duration of the exposure. Reference test standards: GB/T 2423.2, IEC 60068-2-2, IEIA 364, MIL-STD-810F and so on.

Low Temperature Test: This test is used to confirm the products’ adaptability of storage, transportation and usage in the climate of the low temperature and humidity. Severe levels depend on the low temperature, humidity and the time of exposure.

Reference standards: GB/T 2423.1, IEC60068-2-1, EIA 364, MIL-STD-810F, etc..

Temperature shock test: This test is used to confirm the products’ adaptability during storage, transportation and usage in the climate of abrupt temperature change. Severe levels depend on the high/low temperature, dwell time and cycle number. Reference standard: IEC60068-2-14, GB2423.22, GJB150.5, etc..

High and low temperature test chamber is mainly aimed at the electrical, electronic products, components, and other materials’ adaptability during storage, transportation and usage in the high/low temperature.

The test equipment is mainly used for the products in accordance with national standards or user requirements, in low temperature, high temperature, conditions, the physical and other related characteristics of the environment simulation testing, testing, to determine the performance of the product, whether it is still able to meet the predetermined requirements, so as to provide product design, improvement, identification and factory inspection.

High and low temperature test box to prohibit the test items: 1) Explosive; 2) Combustible; 3)Tinder.

 

Lisun developed the GDJS/GDJW series High &Low Temperature and Humidity Chamber; they all meet the standard of IEC60068-2-1(GB/T2423.1) and IEC6008-2-2(GB/T2423.2). They can be applied in the CFL/LED lighting industry for the Aging Testing, that’s according to LM-80 standard.  Besides, they can also used in electronic products, and electronic components and many other area. Lisun Electronic (Shanghai) office is committed to the development and after-sales maintenance of lighting instrument, EMI / EMC testing system and safety testing instruments in the domestic and global market. The full range of products of Lisun are in strict accordance with the quality management and control of ISO9001:2008 requirements for R & D and production; Lisun is also the member unit of global lighting CIE association, all products are according to CIE requirements; in addition, all products of Lisun are certified by CE and get the qualification of the EU.

New Product - LMS-6000 Portable CCD Spectrometer

New Product - LMS-6000 Portable CCD Spectrometer

In order to meet the demands of the lighting market for handle spectrometer, Lisun launches LMS-6000 Portable CCD Spectrometer recently. Compare with Lisun CHROMA-2 Pocket Chroma Meter, LMS-6000 is lighter and easy to carry. Of course, the price is more competitive. LMS-6000 can be inserted SD card to store data, which is easy to use.

 

Let us introduce LMS-6000 briefly.

1. Spectral platform: telephoto asymmetrical crossed CT system.


2. Wavelength range: 380~780nm(350~950nm), FWHM: 2nm, Spectral resolution: 0.2nm


3. Sensor: CCD with 3648pix


4. Integration time: 50μs~20000ms


5. Stray light: <0.1%


6. Illuminance range: 5~200000lx


7. CCT range: 1000~100000K


8. Color coordinates accuracy: ±0.001@standard light source A 2856K


9. Zero calibration: automatically self calibration


10. Test mode: single/continuous


11. LCD screen: 5inch high definition IPS capacitive touch screen and resolution is up to 480*854


12. With 4000mAh rechargeable Li-ion battery continuous working time 20 hours


13. Structure: aluminum alloy carving


14. Size is one Iphone 6S and thickness is like diameter of 1RMB coin

 

LMS-6000 Test Report:



Lisun LMS-600 can be used for lighting field measurement directly. LMS-6000 can measure illuminance E(lx), Candle E(fc), CCT(K), Duv, chromaticity coordinates(x,y), SDCM, CRI, Irradiance Ee(W/m2), Photopic and Scotopic Vision ratio(S/P), Dominant wavelength etc. LMS-6000 can also measure Energy-saving lamps, CFL, HID lamps etc narrow spectrum light source. The application is very wide.

 

Welcome new and old customers to consult LMS-6000 Portable CCD Spectrometer

 

LISUN Engineer Continue to do Installation and Training in Turkey

LISUN Engineer Continue to do Installation and Training in Turkey

 

LISUN engineer visit several customers in Turkey this time. And the customer we discussed today purchased a LSG-1700B Rotation Luminaire Goniophotometer (Big Size) from LISUN this time.

 

LISUN engineer stay 2 days in our customer’s company for the installation and training. The customer is enthusiasm, and they expressed satisfaction with our service finally. It’s a happy trip here.

[caption id="attachment_8561" align="alignnone" width="800"] Figure 1: Group photo of the customer and LISUN engineer(The left)[/caption]

[caption id="attachment_8562" align="alignnone" width="800"] Figure 2: Group photo of the customer and LISUN engineer(The right)[/caption]

[caption id="attachment_8563" align="alignnone" width="800"] Figure 3: Customer are practicing the operation of LSG-1700B Rotation Luminaire[/caption]

[caption id="attachment_8564" align="alignnone" width="800"] Figure 4: Customer are practicing the operation of LSG-1700B Rotation Luminaire Goniophotometer[/caption]

Lisun Electronics Engineers went to Hungary to install Goniophotometer for our Hungary customer. Zengővári Lighting Ltd has been manufacturing lighting products for 20 years in Hungary. In October 2012, Zengővári Lighting Ltd purchased Lisun Rotation Luminaire Goniophotometer(LSG-1800) for lamp testing. Our Engineers spent three days in providing installation and training service to customers. The first day, Zengővári engineers carefully reviewed the drawing provided by Lisun Enigneers, then they installed the test system, and calibrated and debugged the instruments in accordance with CIE standards. The next day, Zengővári staff from technical department together with Lisun Engineers used the calibrated system to test some lamp samples, and they found the test result was very close to the rated specifications. On the last day, Lisun Engineers gave a detail introduction and training for Zengővári staff about the basic knowledge and relevant standards in lighting industry, such as CIE, LM-79, LM-80, as well as the usage, maintainace, after-sales for Lisun Goniophotometer(LSG-1800). Zengővári Lighting Ltd has become the largest lamp manufacturer in Europe; It can design and manufacture lighting products according to the different needs from customers. With high excellence test instruments, right price, and perfect after-sales service, Lisun Group finally wins this order from Zengővári Lighting Ltd. Before leaving, Lisun engineer team takes some photos in front of the famous statue In Budapest square. Lisun Group is Lead in CFL and LED Test Instruments. Our Main products are Spectrophotometer, Goniophotometer, Integrating Sphere, EMI, EMC Testing, Photometer and Colorimeter, LED and CFL tester, Electronic Ballast Tester, Electronic Components Tester, Electrical Safety Tester, Environmental Test Chamber, AC and DC Power Supply etc. With high precision test instruments, and combined with perfect after-sales training service, Lisun Group has won unanimous praise from domestic and foreign customers. Lisun Electronics Inc. Website: www.Lisungroup.com Email: SalesHK@Lisungroup.com

Lisun Electronics Engineers went to Hungary to install Goniophotometer for our Hungary customer.

 

Zengővári Lighting Ltd has been manufacturing lighting products for 20 years in Hungary. In October 2012, Zengővári Lighting Ltd purchased Lisun Rotation Luminaire Goniophotometer(LSG-1800) for lamp testing. Our Engineers spent three days in providing installation and training service to customers. The first day, Zengővári engineers carefully reviewed the drawing provided by Lisun Enigneers, then they installed the test system, and calibrated and debugged the instruments in accordance with CIE standards. The next day, Zengővári staff from technical department together with Lisun Engineers used the calibrated system to test some lamp samples, and they found the test result was very close to the rated specifications. On the last day, Lisun Engineers gave a detail introduction and training for Zengővári staff about the basic knowledge and relevant standards in lighting industry, such as CIE, LM-79, LM-80, as well as the usage, maintainace, after-sales for Lisun Goniophotometer(LSG-1800).

 

Zengővári Lighting Ltd has become the largest lamp manufacturer in Europe; It can design and manufacture lighting products according to the different needs from customers. With high excellence test instruments, right price, and perfect after-sales service, Lisun Group finally wins this order from Zengővári Lighting Ltd.

 

Before leaving, Lisun engineer team takes some photos in front of the famous statue In Budapest square. Lisun Group is Lead in CFL and LED Test Instruments. Our Main products are Spectrophotometer, Goniophotometer, Integrating Sphere, EMI, EMC Testing, Photometer and Colorimeter, LED and CFL tester, Electronic Ballast Tester, Electronic Components Tester, Electrical Safety Tester, Environmental Test Chamber, AC and DC Power Supply etc. With high precision test instruments, and combined with perfect after-sales training service, Lisun Group has won unanimous praise from domestic and foreign

 

LISUN engineer visit Turkey to do installation & training

LISUN engineer visit Turkey to do installation & training

 

In February 2017, LISUN engineer visit Turkey to do installation & training for our customers. This customer is a famous lamp manufacturer in Turkey. They purchase a LSG-1950S Goniophotometer for Automotive and Traffic Signal Lamps and a XYL-VI Photometer and Colorimeter from LISUN this time. We share some photos below:

[caption id="attachment_8540" align="alignnone" width="800"] Figure 1: The LSG-1950S Goniophotometer purchased by the customer[/caption]

[caption id="attachment_8541" align="alignnone" width="449"] Figure 2: The XYL-VI Photometer and Colorimeter purchased by the customer[/caption]

 

 

Moving Mirror Goniophotometer Introduction

Moving Mirror Goniophotometer Introduction

Lisun LSG-2000 Moving Mirror Goniophotometer System adapts the solution of rotating mirror in the center, it is widely applied in road lamp, room lamp, spot lights, stage lights, Mining lamp, Automobile lamp, traffic signal lamp and LED lamp etc. all kinds of luminaries for light distribution performance(light distribution curve) measurement, it can also test total flux, luminaries efficiency for all types of lighting sources. It can realize CIEA-α，CIEB-β，CIEC-γ measurement solution with different software. The test result can be directly used as the input data of the international lighting design software, and comply with the requirements of CIE, IESNA and other international and domestic standards.

 

Lisun LSG-2000 Moving Mirror Goniophotometer System can test spatial luminous intensity distribution, luminance intensity data, zonal luminance flux, luminance efficiency, coefficient of Utilization, luminance limitation curves glare, maximum ratio of distance to height, efficient luminescence angle, upper luminous flux, lower luminous flux, available average illuminance curve, Isocandela diagrams etc. photometry parameters, and voltage, current, power, power factor etc. electrical parameters.

Accuracy of angle: Class A.f1’<3% (Standard Class) or Class L.f1’<1.5%.

C angle：1) Rotating Range: 0°~360°; 2) Angle accuracy: 0.1°; 3) Angular Resolution: 0.001°.

γ angle: 1) Rotating Range: -180°～180°; 2) Angle accuracy: 0.1°; 3) Angular Resolution: 0.001°.

 

This system has 3 rotating axis. Main axis drives the reflective mirror rotate around the center point, reflect the light of the lamp to the detector. At the same time, auxiliary axis reverse rotates synchronously, always keeps the lamp bracket in the vertical position, to ensure the test lamp in normal ignite position in the measurement process, and achieve the lamp in the main axis direction measurement.

 

Lisun LSG-2000 Moving Mirror Goniophotometer System can work with a CCD spectroradiometer with USB interface to test spatial CCT distribution and other spectral color parameters. The rotation motor is from Japan MITSUBISHI MOTORS to make the system rotate very smoothly and stably. And it uses Germanic Angle decode system to ensure the system accuracy. It adapts RS-232 standard interface, it can be connected to PC.

 

Lisun LSG-2000 Moving Mirror Goniophotometer System is widely applied to Luminaries manufacturing enterprise and lab, such as Sharp Electronics in Memphis TN(USA), CS TECH MEXICO, S.A. DE C.V. (Mexico), DORADO Praha s.r.o. (Poland) etc. The reason why Lisun can win some many customers is because we always practice the motto of right products, right price and right service. Lisun will continue feedback good quality products and superior service in the feature.

 

LISUN engineers do installation & training in Turkey

LISUN engineers do installation & training in Turkey

In September 2017, LISUN Engineers do installation and training for customers in Turkey. This customer purchased a LSG-1800B High Precision Rotation Luminaire Goniophotometer and a set of LPCE-2 Integrating Sphere & Spectroradiometer Test System from LISUN. Here we share some photos below:

[caption id="attachment_8521" align="alignnone" width="800"] Figure 1: The LSG-1800B High Precision Rotation Luminaire Goniophotometer purchased by the customer[/caption]

[caption id="attachment_8522" align="alignnone" width="800"] Figure 2: Customer, LISUN engineer and the LSG-1800B High Precision Rotation Luminaire Goniophotometer[/caption]

[caption id="attachment_8523" align="alignnone" width="800"] Figure 3: Customer, LISUN engineer and the LPCE-2 Integrating Sphere & Spectroradiometer Test System[/caption]

[caption id="attachment_8524" align="alignnone" width="449"] Figure 4: Customer, LISUN engineer and the LPCE-2 Integrating Sphere & Spectroradiometer Test System[/caption]

LISUN engineer visit the United States to do installation & training in October 2017

LISUN engineer visit the United States to do installation & training in October 2017

 

At the end of October 2017, LISUN engineer Jacky once again set foot on the journey of installation & training for customers, and he arrived the Phoenix Sky Harbor International Airport Guide (PHX) on October 27. This customer purchased a LSG-1800BCCD High Precision Rotation Luminaire Goniospectroradiometer from LISUN this time.

 

About LSG-1800BCCD: LSG-1800BCCD Goniospectroradiometer is high precision automatic goniophotometric instrument for luminous intensity distribution measurements with facility for turning the light source. The LSG-1800BCCD can do the spatial CCT test when do the intensity distribution test. It is for industrial laboratory measurements the photometric data of luminaires such as LED luminaries, HID lamps, fluorescent lamps and so on. You can learn more at: http://www.lisungroup.com/product-id-383.html

 

Here we share some photos:

[caption id="attachment_8492" align="alignnone" width="800"] Figure 1: Jacky and the customer are installing the LSG-1800BCCD[/caption]

[caption id="attachment_8493" align="alignnone" width="800"] Figure 2: Jacky and the customer has finished the installation[/caption]

[caption id="attachment_8494" align="alignnone" width="800"] Figure 3: The customer is practicing the operation of LSG-1800BCCD[/caption]

IP Waterproof and Dustproof Rating Test

IP Waterproof and Dustproof Rating Test

Purpose of the test: to assess the ability of the material to prevent solids and liquids from entering the external shell
Detection range: electrical and electronic equipment, automotive aircraft and other parts

IP level (waterproof and dustproof) definition
IP waterproof and dustproof, refers to the protection level of electrical equipment, in accordance with its ability of preventing external objects intrusion, waterproof, moisture-proof and dustproof characteristics to be graded. The external objects include tools, human fingers, etc. which are not accessible to the live parts of the lamp to avoid electric shock. IP protection level is composed of two figures, the first number represents the level of dustproof ability for lamps, and the ability of preventing foreign objects intrusion; the second number represents the level of anti moisture and water for lamps. The larger the number is, the higher the degree of protection is. For example, IPXX.

The IP rating system provides a method for classifying products by the levels of waterproof, dustproof and anti-collision for electrical equipment and packaging. This system is approved by most European countries and was announced in IED529 (BS EN 60529: 1992) External Packing Protection level (IP code).

The degree of protection is mostly followed IP by two numbers, and the numbers are used to clarify the level of protection. The first figure indicates the extent of the equipment against the dust, or the extent to which people are protected from harm in a sealed environment. The second figure indicates the waterproof level of the device.

0 No protection
1 Can withstand solid material with length is more than 50mm. For example, hands accidentally touch; can withstand the vertical drop of water.
2 Can withstand solid material with diameter is more than 12mm, and length is no longer than 80mm. For example, fingers; can withstand a direct injection of water at a vertical angle of 15 °.
3 Can withstand solid material with diameter is more than 2.5mm. For example, tools or wires; can withstand direct jetting of water at a vertical angle of 60 °.
4 Can withstand solid material with a diameter is more than 1.0mm. For example, small wires; can withstand water spray from any direction- allowing limited access.
5 Dustproof, limited access (no harmful deposits). Can withstand low pressure water jet from any direction - allowing limited access.
6 Dust is difficult to enter, completely dustproof. Can withstand strong water column jet from any direction - allowing limited access.
7 Allowing for putting into 0.15m-1m depth water for a short time which can be up to 30 minutes.
8 Can withstand long-term soaking under pressure.

LISUN Engineer visit Brazil to do installation & Training In September 2017

LISUN Engineer visit Brazil to do installation & Training In September 2017

 

At the beginning of September 2017, LISUN engineer fly to Brazil immediately after the installation and training in the United States. LISUN Engineer stayed in Brazil for nearly half a month this time to do installation and training and meet several customers who are interested in LISUN products at the same time.

 

This article is for one of our customers in Brazil, the customer is a famous local lighting manufacturer, they build a new laboratory recently, and purchase some LED test equipments from LISUN. Such as LSG-1800BCCD High Precision Rotation Luminaire Goniospectroradiometer

, LPCE-3 Integrating Sphere & Spectroradiometer Compact LED Testing System, JL3456 Waterproof Test system and IK07-10 IK Level Tester.

 

LISUN engineer have designed the darkroom of the LSG-1800BCCD and operating room of JL-3456 waterproof test system for our customer. LISUN engineer spent 4 days here, the installation & training work smoothly, and LISUN service won the recognition of our customer

Finally we share some photos here:

[caption id="attachment_8467" align="alignnone" width="800"] Figure 1: LISUN engineer, our customer and LSG-1800BCCD Goniophotometer[/caption]

[caption id="attachment_8468" align="alignnone" width="800"] Figure 2: Customers are practicing the operation of the LSG-1800BCCD Goniophotometer[/caption]

[caption id="attachment_8470" align="alignnone" width="800"] Figure 3: LISUN engineer is training the LPCE-3 Integrating Sphere & Spectroradiometer Test System[/caption]

[caption id="attachment_8471" align="alignnone" width="800"] Figure 4: LISUN engineer, our customer and LPCE-3 Integrating Sphere & Spectroradiometer Test System[/caption]

[caption id="attachment_8472" align="alignnone" width="800"] Figure 5: LISUN engineer is training the JL3456 Waterproof Test System[/caption]

[caption id="attachment_8473" align="alignnone" width="800"] Figure 6: LISUN engineer is training the IK07-10 IK Level Test System[/caption]

LISUN engineer visit Kenya to do installation & training in AUGUST 2017

LISUN engineer visit Kenya to do installation & training in AUGUST 2017

 

LISUN engineer visit Kenya to do installation and training for customer here in early AUGUST 2017 The customer purchased the LPCE-2 High Precision Spectroradiometer & Integral Sphere Test System (1.5m Constant Integrating Sphere) from LISUN this time.

 

Our engineers go to do installation and training all over the world almost every month, our customers are very satisfied with our service, which also contribute to more and more customers, and more and more business volume. We will provide customers with better products and better service in the future.

 

Here share some photos you:

 

[caption id="attachment_8429" align="alignnone" width="800"] Picture 1: LISUN engineer (Right second) with the customer[/caption]

[caption id="attachment_8430" align="alignnone" width="800"] Picture 2: LISUN engineer are training for customer[/caption]

[caption id="attachment_8431" align="alignnone" width="800"] Picture 3: LISUN engineer practice the operation for customer[/caption]

Integrating Sphere Work Principle

Integrating Sphere Work Principle

If the total flux of light enter integrating sphere is Φ, irradiate on the inner wall area S3 of the integrating sphere. The light diffuse on the surface of the inner wall several times. Examine the illumination of the inner wall at any point M. Since the light entering the integrating sphere directly illuminates at S3, one part of the light diffused by each point on the S3 will irradiate on the observation M point directly, the illuminance of all these light illuminated to point M is called the direct illumination, which is denoted by E0. In addition, there are some light diffused from S3 to each point on the inner wall of the integrating sphere by multiple diffuse reflections and then reach to point M, the sum illuminance of this part light is called multiple diffuse reflection illuminance, which is denoted by E∑. Thus, the illuminance E of the observation point M is the sum of the two parts of the illuminance: E=E0+E∑         (1-1)

Direct Illuminance E0 www.LisunGroup.cn

In the S3 range, take a small element dSA at any point A, the total luminous flux on this surface is dΦ, then the illuminance EA of the position A: EA=dΦ/dSA, the inner wall of integrating sphere can be seen as ideal Reflector, so the brightness LA at A: LA=EAρ/π(where ρ is the diffuse reflection coefficient). If take a small element dSM at observation position A , the luminous flux from the element dSA  with brightness LA to the element dSM: dΦA=LAdSAcosi1dSMcosi1’/rA2.

dE0=dΦA/dSM=LAdSAcosi1cosi1’/rA2=LAdSA/4R2 

The physical quantities in the formulas are shown in the figure. The figure also can show: i1=i1’, rA=2Rcosi1(R is the radius of the inner wall of the integrating sphere). The illuminance of the light emitted from element dSA at the observation position M: dE0=dΦA/dSM=LAdSAcosi1cosi1’/rA2=LAdSA/4R2.

 

The physical quantities in the formulas are given and sorted and the direct illuminance of the entire S3 diffuse light at M is obtained as follows: E0=ρ∫S3dΦ/4πR2=ρΦ/4πR2                    (1-2)

Φ in the formula is the total luminous flux into the integrating sphere.

Multiple diffuse reflections illuminance E∑

Firstly analyze the light that the direct light from S3 at any position N on the inner wall and then diffuse again and directly reaches the observation position M. This part is called an additional illumination E1.

Since N also gets the direct illumination E0, the luminance L0 is L0=ρE0/π. Take surface element dSN at point N, An additional illuminance dE1 formed at position M from dSN: dE1=dΦ1/dSN=L0dSNcosi2dSMcosi2’/ 4R2cosi2cosi2’ dSM =L0dSN/4R2

Diffused by the entire interior of the integrating sphere, the total primary illuminance E1 formed at position M: E1=ρE0∫SdSN/4πR2=ρE0S/4πR2=ρE0(1-f)S1/4πR

S1 is the area of the inner wall of the whole sphere; f is the opening ratio (f=S2/S1, S2 is the spherical area at the opening)

Substitute S1=4πR2into the above equation：E1=ρ(1-f)E0                     (1-3)

Follow the same method, we could derive the second illuminance E2, the third illuminance E3 and so on formed at the position M from the first illumiance inside the inner wall:

E2=ρ(1-f)E1=[ρ(1-f)]2E0

E3=ρ(1-f)E2=[ρ(1-f)]3E0  www.lisungroup.cn

In this way, multiple diffuse reflections total illuminance is: E∑=E1+E2+E3+……=E0ρ(1-f)/[1-ρ(1-f)]                    (1-4)

Thus, the total illuminance E at the position M is: E=E0+E∑=E0/[1-ρ(1-f)]                        (1-5)

Feed the formula (1-2) above, then we can obtain:

E=ρΦ/4πR2[1-ρ(1-f)]                   (1-6)

We can see from the above formula, the illuminance at any position on the inner wall is proportional to the total luminous flux entering the integrating sphere. This is the basic formula for applying the luminous flux integrating sphere.

Shanghai Lisun (India) New Delhi Office Exhibition 2016 New Delhi LED Lighting Exhibition

 

Shanghai Lisun (India) New Delhi Office Exhibition 2016 New Delhi LED Lighting Exhibition

 

In October 5th-7th 2016, New Delhi LED lighting exhibition held in New Delhi, the capital of India. As one of India's largest LED lighting exhibition, New Delhi LED lighting exhibition displays different lighting solutions, including LED chips, LED lamps, LED package, intelligent building lighting design and LED test equipment, etc..

 

In order to do better serve for customers in India, Lisun group India Office jointly participate participate in this exhibition and display the latest LED test technology and test equipment to customers. Lisun group have been in India market for 9 years, and have been cooperating with too many local customer. There are many new and old customers to visit our booth during the exhibition, and we negotiate a new cooperation with our colleagues in India. Lisun group focus on the LED test instrument began in 2003, we have cooperated with many famous lighting companies and third party inspection agencies on this way, and we will continue to provide the best lighting test solutions and services for the customers.

 

Here are some of the details of the show:

[caption id="attachment_8399" align="alignnone" width="286"] Shanghai Lisun (India) New Delhi Office Exhibition 2016 New Delhi LED Lighting Exhibition[/caption]