Feasa Optical Heads

Feasa Optical Heads are special receptacles that improve the stability of intensity measurements.

The Feasa Optical Heads have been designed to ensure stability when testing the intensity of LEDs. The robust and compact design delivers consistent and repeatable readings with a <10% intensity change over a 1mm placement of the LED. The Optical Head addresses the following issues:

Compensation for LED Placement

Repeatable Intensity Readings

Reduced sensitivity to ambient light

Product Number	Product Uses
OH-1	This can be used when LEDs are located as close as 3.55mm centre to centre on a PCB.
OH-2S	This can be used when there are fixturing height restrictions as it is only 30mm in length.
OH-3	Our standard Optical Head and is suitable for most applications with a centre to centre distance of 5mm.
OH-4	Ideal for testing 90° or side emitting LEDs.
OH-5	Is used when LEDs are as close as 4.00mm centre to centre on a PCB.
OH-6	Has a large diameter, 8.00mm and is used with large diameter LEDs. Designed for testing High Brightness LEDs and LEDs with a large diameter, particularly suitable for Daytime Running Lights.
OH-7LT	Is designed to be used in an oven with the LED Life Tester. The temperature range of this Optical Head is -65°C to +125°C.
OH-8IR	Is designed to test the Intensity of Infrared LEDs in conjunction with the IR LED Analyser.
OH-9RF	Suitable for use in RF environments.
OH-10	Suitable for high bright LEDs on close centres; 1.3mm centre to centre.
OH-11	Suitable for high bright LEDs on very close centres; 1.0mm centre to centre.
OH-13	Ideal for testing Low Light LEDs particularly suitable for Backlight Switches and Panels. Designed for 2.2mm fiber to be used in conjunction with the Low Light Analyser. This requires epoxy to attach the fiber to the Optical Head.
OH-14	Ideal for testing 90° or side emitting Low Light LEDs particularly suitable for Backlight Switches and Panels. Designed for 2.2mm fiber to be used in conjunction with the Low Light Analyser. This requires epoxy to attach the fiber to the Optical Head.
OH-16	Ideal for testing low light LEDs or LEDs with a large diameter, particularly suitable for Backlight Switches and Panels. Designed for 2.2mm fiber to be used in conjunction with the Low Light Analyser.

 

The typical gap between the LED being tested and the Optical Head is between 3mm and 5mm but may vary significantly depending on the application.