Spectral Goniophotometer LED Tester

According to the National Market Supervision and Administration and National Standardization Technology Commission announced, the National Lighting Electrical Standardization Technical Committee Light Radiation Measurement Branch of the National Lighting Appliance Standardization Technical Committee is responsible for the implementation of and the National Lighting Electrical Standardization Technical Committee. LED product space distribution measurement method “was released on 28th December, 2018, and the standard will be implemented from 1st, July, 2019.

In recent years, with the application of LED lighting products in people’s lives and production venues, people have also put forward increasing requirements for the light quality of LED products. Among them an important factor has received widespread attention in the industry. There are many standards or technical specifications in the international and domestic standards of the space consistency of LED products, but the corresponding measurement methods are very simple, and it cannot meet the laboratory measurement of reappearance and comparative targets.

For the above status, the Light Lightning Electric Detection Co., Ltd. of the Shanghai Times, Hangzhou Yuanshu Optoelectronics Information Co., Ltd., Dongguan Quality Supervision and Testing Center in Dongguan City, Guangdong Province, Zhongguancun Semiconductor Lighting Engineering R & D and Industrial Alliance, Hangzhou Huapong Mingming Optoelectronics Co., Ltd., etc. The national standards of the “LED Product Space color distribution measurement method” formulated by the unit stipulates the representation parameters and measurement methods of the spatial color of white light LED products for lighting. Measurement equipment and measurement steps and data processing give uniform specifications.

It is worth mentioning that most of the content of this standard project is the research results of the International Lighting Commission (CIE) technical committee TC2-74 “Goniospect Roradioradiometry of Optical Radiation Sources”. At present, the international standards drafted by the TC have entered the ending stage, while my country is the first to be in the international. It has formulated and released standards for the color distribution of LED space. To a certain extent, it has also won the opportunity for my country’s products in international competition.

The goniophotometer is the main measurement equipment for lamp with light performance testing. It can be used to measure parameters such as the space -intensity distribution, total optical flux and lamp efficiency of the lamps or light sources. The composition of the goniophotometer includes: precision turntable and control system, spectral analysis system, standard lights, alignment system, computer processing system and other parts.

The LED lamps have the advantages of high emotional efficiency, long life, low working voltage, fast response speed, good monochrome, safe and environmental protection, etc., and are called “green energy”. The matching curve represents the distribution of light emitted by the lamp or light source in space. It is an important evaluation indicator of the performance of the lamps and the effect of use. The drawing method of the light curve is based on the original point of the light source, and the light shaft is 0 ° axis. The radius of the round radius indicates the light of the light. The luminous intensity of each corner of the lamps from 0 ° is drawn on this polar coordinate plane, and the light curve is formed. According to the light curve of the lamp, the quality of the light spots and the efficiency of the lamp can be obtained, and the illumination value and illumination distribution of any point in the performance area can be calculated.

The goniophotometer needs to be used with a large dark chamber, and low reflectivity materials are used in the room to avoid reflecting light into the probe. Because the measurement system is easily affected by the ambient temperature, it is very critical to maintain the stability of the light source’s own temperature. The goniophotometer reads one by one at an angle, which is very time -consuming. If you only need to measure the light flux parameters of the lamp, there is no strict requirements for the measurement distance.

Depending on the measurement of the optical path arrangement, the measurement of the optical flux can be measured by two measurement schemes: illuminating points and light accumulation.
1. illuminance points method. There is no limit on the measurement distance, and the measurement space required is small. As long as you can measure the illumination, even if the distance is short, you can get accurate total light flux. You can useLISUN LSG-1200A compact goniophotometer to measure, distributed by measuring the illumination of light sources in the space, and obtaining a total light general volume for the entire space points. Because the measuring distance and the installation position of the light source are not sensitive, and the use of reflectors can be avoided, which can achieve high measurement accuracy. It is a method for implementing the benchmark unit of light flux recommended by CIE.

2. Light strong points method. The light strong accumulation method is distributed by measuring the light of the light source in the space, and the total light is through the full space points. The measuring light distribution requires sufficient distance, which can be seen as similar to the light source, and uses the distance between the distance between the square and reflex.

In this case, IEC, CIE, IESNA-LM-79 and other international standard organizations are recommended to use LSG-6000 rotating reflector-type goniophotometer to measure the total light flux, light strong and other related parameters of large lamps. This measurement method. The results obtained have high accuracy than the integral optical method, so most third -party testing agencies and large national laboratories are mostly used by rotating reflective mirror goniophotometer. LISUN goniophotometer such as LSG-1890B/LSG-1800A and other arms and residers (light measuring littering meter). This goniophotometer has a high cost performance, which can meet the most production enterprises test requirements, especially when measuring light curves and exporting IES files.

According to the LM-79 and terms 9.3.1, LISUN launched the LSG-6000 rotating reflector-type goniophotometer. The working principle of this goniophotometer is: the position of the lamp is always unchanged, and only rotates the reflector to improve the data accuracy during testing. In a specific environment, there are the following factors that apply the accuracy of goniophotometer: scan resolution, angle range, the polarization of the instrument itself, air flow, and ambient temperature. The most important of these is the polarization, air flow and temperature of the instrument, because when using the arms/single -arm cellular goniophotometer measurement lamps, the air flow and temperature caused by the movement of the lamp itself will reduce the relevant measurement data accuracy; the polarization of the instrument will also affect the test accuracy, but with the development of technology, the impact of more advanced power devices and control technology is used, and the impact of polarization has been limited. The parameters of the LSG-6000 goniophotometer measurement are mainly light, strong distribution of light, regional light flux, light effect, brightness distribution, utilization coefficient, glare level, brightness limit curve, maximum allowable distance to high ratio, effective light angle, upper light flux flux , Delivery Light Plums, Equity curve, and other light -strong curves and electrical performance parameters (voltage, current, power, power factor), etc.

LSG-6000 Moving Detector Goniophotometer (Mirror Type C) was manufactured by LISUN completely meets LM-79-19, IES LM-80-08, COMMISSION DELEGATED REGULATION (EU) 2019/2015, CIE-121, CIE S025, SASO 2902, IS16106 and EN13032-1 clause 6.1.1.3 type 4 requirements. LSG-6000 is the latest upgraded product of LSG-5000 and LSG-3000 in compliance with the requirements of the LM-79-19 standard Clause 7.3.1, its an automatic light distribution intensity 3D curve testing system for measuring light. The measuring distance is from 5m to 30m.

LSG- 6000 Moving Mirror Goniophotometer Principle

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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