For measuring luminous intensity [cd] of LEDs,
Instrument Systems has developed a range of suitable measurement adapters.
These can be differentiated by their useable spectral range (visible or UV),
the required measurement geometry ILED-A or ILED-B and the intended
application (laboratory or manufacturing).
The measurement adapters incorporate a diffuser with a
precision aperture of 1 cm² to represent the light sensitive area of the
detector. The entrance facet of a fiber bundle is positioned behind the
diffuser and serves to couple the light into the spectrometer. This design
is characterized by a high light throughput together with acceptable
homogeneity of the detector area. The LED-4xx series of measurement adapters
is therefore suitable for low light output LEDs as well as for fast
production testing.
For applications which require the highest accuracy, the
LED 25 was developed for "Averaged LED Intensity" measurements according to
CIE 127 recommendations. The LED 25 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.
The LED-4xx measurement adapters are compatible with all
test sockets of the LED-5xx, -6xx, and -81x series. A reproducible and exact
positioning of the LEDs is ensured by use of a clamping fixture. Special
shortened versions are available for use in manufacturing environments (e.g.
in combination with LED sorting machines.
Features:
- CIE 127 compliant for luminous intensity or "Averaged
LED Intensity"
- available in configurations for ILED-A and ILED-B
- high light throughput enables short acquisition times
- clamping fixture ensures reproducible positioning of LED
test sockets
- suitable for all LED test sockets with 25 mm diameter
(LED-5xx, LED-6xx, LED-81x)
- connects via fiber bundle to all Instrument Systems
spectrometers
Overview of Instrument Systems LED measurement adapters:
|
Model
|
Spectral range
|
Measurement geometry
|
Format
|
|
Measurement adapter for
lab applications (with LED test sockets)
|
|
LED-436
|
VIS-IR
|
CIE ILED-B
|
diffuser
|
|
LED-437
|
UV-VIS-NIR
|
|
LED-445
|
VIS-IR
|
CIE ILED-A
|
|
LED-446
|
|
LED-447
|
UV-VIS-NIR
|
|
LED25-430
|
UV-VIS-IR
|
CIE ILED-B
|
integrating sphere
|
|
LED25-440
|
CIE ILED-A
|
|
Short measurement
adapter for production applications
|
|
LED-433
|
IS-IR
|
CIE ILED-B
|
diffuser |
|
LED-433-1 1)
|
|
LED-434
|
UV-VIS-NIR
|
|
LED-434-1 1)
|
|
LED-453
|
VIS-IR
|
0.01 sr at 50 mm
separation
|
|
LED-454
|
UV-VIS-NIR
|
|
LED-439 2)
|
|
|
LED25-235 3)
|
|
CIE ILED-B
|
integrating sphere
|
1) Version with protective glass
2) LED-439 is an extension for use of the LED-43x und LED-45x adapters with
the Instrument Systems LED test sockets
3) Adapter for LED 25 optical probe
|
LED 25 Averaged LED Intensity
Adapter