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LED Display Test - LED and LIGHT BAR test

Optical-color-electric test for single LED

Optical-color-electric test for single LED

  • Description
  • Parameter
  • Application

Rich parameters can be tested such as luminous flux, luminous efficiency, luminous power, relative spectral power distribution, chromaticity coordinates, CCT, dominant wavelength, peak wavelength, half-peak wavelength, CRI, color purity, red ratio, color tolerance, forward voltage/current, reverse voltage/current, spectrum distribution (options), color distribution (option), luminous intensity, beam angle, 3D luminous intensity distribution diagram, and luminous intensity-current curve etc. The parameters of instantaneous optical characteristics(pulse measurement) and steady state optical characteristics(direct current measurement) of LED can be test simultaneously.


Basic principles 


low stray light

By adopting the high-precision grating and the scientific-grade array detector and by using the BWCT technology and NIST stray light correction technology, the stray light of HAAS-2000 can be controlled lower than the 1/10 of other original high-precision fast spectrometers.

Wide linear dynamic range

Compared with the common detector, the scientific-grade array detector used in HAAS-2000 has a wider linear dynamic range, which can be further widened after the design of optical matching. In addition, SBCT technology also greatly improves the linear dynamic range of HAAS-2000.

Fast test 

HAAS-2000 can not only measure the optical characteristics of steady-state light source but also transient light source, which fully complies with the relevant standards. Within the sensitivity range of the instrument, the instrument can test light source at any frequency, for example less than the microsecond level, and the instrument can obtain spectral power distribution by synchronizing the trigger function. HAAS-2000 adopts scientific-grade array detector instead of mechanical scanning system, which can obtain spectral power distribution in a very short time (millisecond).


HAAS-2000 is designed for high-precision test by adopting the top best scientific-grade array detector, high-precision grating, great optical systems and precise electronic circuits. The system has the advantages of high resolution, high sensitivity, high sensitivity, low noise, low stray light and wide dynamic range to achieve precise measurement purposes.  

High repeatability and stability 

The instrument has the scanning mechanism without mechanical motion and the constant temperature refrigeration technology to control the constant temperature in the level of 0.05 ℃, which guarantees highly repeatability and stability of the measurement. 



HAAS-2000 VIS type

Optical bench


HAMAMATSU TE-cooled back lighting  CCD

CCD Refrigeration temperature-10℃

Stability: ±0.05℃ CCD Pixels1024x128Binning mode


Flat holographic grating

Slit width

100μm (standard)

Optical input

Fiber optics


Spectral range

380-780nm (standard)

Spectral resolution


Wavelength accuracy


Stray lightIlluminant A


Colorimetry parameters

Color accuracy (x,y)


Color reproducibility (x,y)

±0.00015x±0.0002y (blue LED)

Electrical parameters

A/D converter

16 bits /1.25MHz



Integration time


Electrical accuracy 

±0.2 class

Synchronous trigger signal

Fast measurement of transient (pulse) photoelectricity and steady-state (DC) optical characteristics in high power LED pulse mode









±1% 3)   


1) BCWT is applied  2) SBCT is applied  3) Excluding the uncertainty of standard lamp  4) 3000nm can be customized

Typical report: