The challenge: high quality and flexibility of measuring instruments

The measurement equipment used to implement LED production control needs to comply with strict requirements. In the laboratory (the preparation stage before the production process or quality control), in addition to the high-quality equipment, a high degree of flexibility is also required. The selection of suitable components for the sphere measuring station used to measure LED/SSL depends on the size and shape of the light source to be measured. Various LED and SSL light source designs require highly flexible systems and perfectly matched accessories, depending on the application (production or laboratory) and specific measurement conditions.

Special requirements for LED measurement in lighting laboratory:

• High degree of precision and accuracy

• A wide range of spherical geometries and flexible mechanical interfaces are available

• Special measuring sleeve for fixing the LED

• Thermal management of high-power LEDs

Solution: Combine high-quality integrating sphere and array spectrometer

 The ISP series includes a wide range of integrating spheres, various reflective coating options and accessories. Used in conjunction with CAS series spectrometers, high-precision optical measurements can be performed in just a few milliseconds. With a variety of measurement sleeves and accessory combinations, it can meet the requirements of various measurement tasks with different requirements.

System Configuration

The measuring station used to determine the characteristics of LED and SSL light sources usually contains the following components:

Spectrometer  Instrument Systems CAS 140 or CAS 120 series spectrometer                

CAS 140D-Product features :

• Used globally as a standard instrument

  200 – 1100nm all have corresponding models

  "Thin back-illuminated" detector with cooling performance for minimum dark current

  Spectrometer with the strongest stray light suppression

  Integration time from 4 ms to 65 s

  Automatic recognition of accessories

  Comprehensive SpecWin Pro spectroscopy software

  High-precision measurement of correlated color temperature (CCT) and color rendering index (CRI)

  Traceable measurement uncertainty of only ±0.0015 on standard chromaticity coordinates

  Additional stray light correction (optional)                                                                 

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Integrating sphere                 ISP series integrating spheres, with an inner diameter of 75 mm to 1900 mm and a barium sulfate coating, can achieve high light throughput in a wide wavelength range, and are used to measure single LEDs to large lighting modules. Provide a variety of versions, options and connection options to meet various needs in the laboratory and production.

ISP Integrating Sphere-Product Features:

• Barium sulfate coating with 97% reflectivity in the visible range

  Minimize aging effects, extremely low coating fluorescence level

  Covers the spectral range from 240 to 2600 nm

  The ideal product tailored to the Instrument Systems spectrometer portfolio

  Spectrometer can be connected via optical cable

The LED calibration standard is      used to test the ACS-570 reference LED of the measurement system.  

Light intensity measuring sleeve for special LED 4xx for measuring light intensity according to the CIE 127 standard     Sleeve.