How to use the optical integrating sphere tester

The integrating sphere is a hollow sphere coated with white diffuse reflective material on its inner wall, also known as photometric sphere and luminous flux sphere. The inner wall of the ball is coated with an ideal diffuse reflection material, that is, a material with a diffuse reflection coefficient close to 1, so that the spectral reflectance of the visible light of the inner wall of the ball is above 99%. The commonly used material is magnesium oxide or barium sulfate, which is sprayed on the inner wall after being evenly mixed with the gum adhesive. The integrating sphere can be used to test the luminous flux, color temperature, light efficiency and other parameters of the light source.

The working principle of integrating sphere is:
The light is collected by the integrating sphere through the sampling port, and after multiple reflections inside the integrating sphere, the light will be very evenly presented at various positions inside the integrating sphere. When we use the light in the integrating sphere to measure, we can make the results more reliable. The advantage of using integrating sphere structure is that it can reduce and eliminate the measurement error caused by the light shape, divergence angle and the difference of responsivity at different positions on the detector.

Optical integrating sphere tester is one of the most common optical measuring instruments in the market. This kind of integrating sphere tester can obtain all the radiation emitted by a light source at the same time. Therefore, not only the manufacturer, but also the end-user users need to know the specific use method of the optical integrating sphere tester when purchasing the integrating sphere tester.

From the perspective of users, the specific measurement and use methods of the integrating sphere tester mainly include the following four aspects:
1. Preparation: prepare an integrating sphere of appropriate size, a standard light source that is required to be close to the luminous flux of the light source of the lamp, and keep the ambient temperature at about 25 ° C. No wind is allowed to blow into the integrating sphere;
2. Inspection: install the standard light source at the center of the integrating sphere, connect the current source and power meter, and then light the standard light source. Adjust the operation interface of integrating sphere software to continuous test until the luminous flux is stable, and record the luminous flux value;
3. Calibration: the calibration operation is similar to the inspection, but the difference is that zero calibration is required before lighting the standard light source. After the light flux is stable, input the standard color temperature and standard luminous flux of the standard light source in the operation interface of the integrating sphere software, and then click Start calibration. The integrating sphere tester will automatically complete calibration;
4. Test sample: install the sample into the integrating sphere, light the sample, close the integrating sphere and start the test. After the light flux is stable, record the value.

LISUN lauched LPCE-2 Integrating Sphere Spectroradiometer LED Testing System is for single LEDs and LED lighting products light measurement. LED’s quality should be tested by checking its photometric, colorimetric and electrical parameters. According to CIE 177, CIE84,  CIE-13.3, IES LM-79-19, Optical-Engineering-49-3-033602, COMMISSION DELEGATED REGULATION (EU) 2019/2015, IESNA LM-63-2, IES-LM-80 and ANSI-C78.377, it recommends to using an array spectroradiometer with an integrating sphere to test SSL products. The LPCE-2 system is applied with LMS-9000C High Precision CCD Spectroradiometer or LMS-9500C Scientific Grade CCD Spectroradiometer, and A molding integrating sphere with holder base. This sphere is more round and the test result is more accruacy than the traditional integrating sphere.

High Precision Spectroradiometer Integrating Sphere System LPCE-2(LMS-9000)

LPCE-3 is a CCD Spectroradiometer Integrating Sphere Compact System for LED Testing. It is suitable for single LED and LED luminaires’ photometric, colorimetric and electrical measurement. The measured data meets the requirements of CIE 177, CIE84,  CIE-13.3, COMMISSION DELEGATED REGULATION (EU) 2019/2015, IES LM-79-19, Optical-Engineering-49-3-033602, IESNA LM-63-2, ANSI-C78.377 and GB standards

CCD Spectroradiometer Integrating Sphere Compact System LPCE-3

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

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