LED photochromic fast testing system adopts a new patent detector with tristimulus values integral principle. It fits for the requirements of the LED manufacturers to test on-line and the sale department to do fast testing. The equipment can test LED's correlative color temperature, chromaticity coordinate, luminous flux (equip with integrating sphere) and other parameters etc .With its spectrum calibrationfunction. Theoretically, it meets the requirement of CIE. 

Photometric characteristics Y:

>Spectral response up to national standard

>Luminosity value linearity：0.2%

>Luminosity repeatability：0.2% 

Chroma characteristic:

>Test range of color temperature：1，500K～25，000K

>Resolution of color temperature：1K

>Test accuracy of color temperature：better than ±20K (standard light source A)

>Accuracy of chroma coordinate：x, y： 

  Standard light source A：better than ±0.002  

  Other light source：better than ±0.005 （select relative spectrum calibration）

  Repeatability：x，y better than ±0.0005 （standard light source A）

>It can test color different and display it in the ellipse diagram

>After set the reference source, it can display dx, dy, du, dv, dTc.

Production-line test

With outer triggering function,triggering time : 1-60s adjustable

Instruments used CIE-XYZ tri-stimulus value of integral-type probe, with the integrating sphere can be a quick test LED's luminous flux (Y), color temperature (Tc), color coordinates CIE1931 (x, y), and CIE1960 (u, v), CIE1976 ( u ', v')

CIE 13.3:1995 Method of Measuring and Specifying Color Rendering of Light Sources

CIE 15-2004   Colorimery

CIE 84：1989  Measurement of luminous flux

CIE 127-2007 Measurement of LEDs

CIE 177-2007 Colour Rendering of White LED Light Sources

IESNA LM-79 Electrical and Photometric Mesaurements of Solid-State Liguting

...