Spectrum matching level
angle of collimation
100mw/cm2 u00b120% adjustable
Light face irradiance
Table 1: ASTM class specifications
Spectral Match (each interval)
Irradiance Spatial Non-Uniformity
Irradiance Temporal Instability
0.75 - 1.25
0.6 - 1.4
0.4 - 2.0
Beijing 7-Star Optical Instruments Co., Ltd, established in 2004, is a manufacturer of providing electric- optic products for research and development. Products which are mainly applied in the field of solar energy, new materials, LED light, laser application, automation and precise positioning could satisfy many requirements of science research and industry application.
Since founded, 7-Star has carried on the management theory of independent innovation, advanced science and technology, best quality and customer satisfaction.
7-Star who won many patents and software copyrights, awarded the title “ the first high-tech enterprise” among industry and become the patent pilot units in the year 2006.
Products obtain gold award of Beijing invention and innovation contest and second award of national mechanical industry of science and technology successively. In addition, its honored to be the innovate products which entered into government purchase catalogue and got innovation fund of government.
7-Star ’s senior technicians are selected to be the technology leader in Beijing Tongzhou Zone. Company has own ISO9001:2008 in 2009.
Following is our main products:
Solar Cell Spectral Measurements System, I/V Measurements System, Fluorescence Measurements System, Detector Response Measurements System, the LED Measurements System, Multi-grating Spectrometers , Monochromators, Solar Simulators, all kind of Scientific Research Light Sources, Data Acquisition, Ellipsometers , Precision Positioning System, Motorized and Manual Precision Translation Stages, Lift Platforms, Rotary Stages, Tilt platforms, Goniometers, Opto-Mechanics, Optical table and so on.
7-Star dedicated to improve research and development abilities meanwhile maintain cooperation relationship with research institutes closely. In order to guarantee advanced quality and applicability of products, 7-Star built photoelectric laboratories with research institutes together. Furthermore,one of the solar energy photovoltaic laboratory has proposed a comprehensive solutions to the spectral response testing and thickness control for some kind of solar cells such as monocrystalline silicon, multicrystalline silicon, and DSSC thin film solar cells etc.
7-Star ensure to provide you with delicate design, precision production and perfect service. And we are looking forward to establishing long-term cooperation relationship with you.