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Blue Light Hazard Measurement

Determination of blue light hazard in acc. with IEC 62471 and IEC/TR 62778

Blue Light Hazard Measurement

Blue Light Hazard Measurement

Determination of blue light hazard in acc. with IEC 62471 and IEC/TR 62778

The purpose of the blue light hazard measuring station from Instrument Systems is, e.g. to evaluate and classify LED lamps and luminaires according to blue light hazard as described in Standards IEC 62471 and IEC/TR 62778.

Instrument Systems is represented in all major international standard bodies. Accordingly, the individual system components in our high-end portfolio are subject to ongoing technological upgrading to ensure that they satisfy current requirements. Precise BLH measurements on the basis of our established CAS 140D spectroradiometer guarantee the greatest possible safety in the classification of tested lamps and luminaires in die BLH risk classes.

Key Features:

Determination of blue light hazard in accordance with international standards

Subdivision into risk classes based on highly precise measurements

High sensitivity in the UV range due to the PTFE coating of the integrating sphere

Stray light correction for best-possible sensitivity of the spectroradiometer in the blue and UV spectral range



CAS 140D-157 (UV-VIS) for the spectral range from 200-830 nm with particularly high sensitivity in the UV range from 200 nm.

(standard method)

A telescopic optical probe with viewfinder camera facilitates positioning and faster measurement of BLH for light sources that exhibit no radiation below 360 nm.


SpecWin Pro lab software with the integrals and calculations necessary for BLH assessment.

Stray light matrix

Best-possible stray light properties using a spectrometer-specific numerical stray light correction.

PTFE integrating sphere with aperture tube (alternative method)

ISP 150-UV integrating sphere coated with PTFE reflective material with an internal diameter of 150 mm for high optical throughput in UV from 200 nm. The tube in the attachment guarantees a measurement distance of 200 mm and includes the necessary apertures to achieve the prescribed solid angle.

Examples of applications