LED-4xx

Instrument Systems has developed a range of suitable measurement adapters for measuring luminous intensity [cd] of LEDs. Differentiated is determined by their useable spectral range (visible or UV), the required measurement geometry ILED-A or ILED-B and the intended application (laboratory or manufacturing).

Incorporating a diffuser with a precision aperture of 1 cm² these Measurement adapters represent the light sensitive area of the detector. An entrance facet of a fiber bundle is positioned behind the diffuser and serves to couple the light into the spectrometer. This specific design is characterized by a high light throughput together with acceptable homogeneity of the detector area. LED-4xx series of measurement adapters is particularly suitable for low light output LEDs as well as for fast production testing.

If you require require the highest accuracy, the LED 25 was developed for “Averaged LED Intensity” measurements according to CIE 127 recommendations. It is based on an integrating sphere and features a perfectly homogeneous light sensitivity over the entire detector area, although with significant sacrifice of the light throughput.

LED-4xx measurement adapters prove compatible with all test sockets of the LED-5xx, -6xx, and -81x series. A clamping fixture. of reproducible and exact positioning of the LEDs is ensured by use of Special shortened versions that are available for use in manufacturing environments (e.g. in combination with LED sorting machines.