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discontinued
Cat Code:
IRLEDkit-940/20 $29 -
'Kit'
52 mm Diameter 50 LED
Round Lamp Kit - PCB, LEDs, Housing & Assembly Notes.
Wavelength
/ Angle: ~ 940 nm, ±10º (20º)
Max Radiant
Intensity: ~ 120 mW/sr @ Max 100 mA
Visibility @ Max
current: Just perceptible.
Forward Voltage at
Max Current for 5 LEDs in series = ~ 7 volts.
Main Spot Diameter:
~ 1.06 metres @ 3 metres.
PCB tracks are
arranged as Five Groups of 10 series connected LEDs. Interconnections may be
rearranged to create Ten Groups of 5 series connected LEDs. Groups are
paralleled and a series resistor used to limit total current.
Construction of
Five Group Lamp is straightforward. Ten Group Lamp requires extra care as 25
LEDs are inserted backwards. The edges of some LEDs may need to be filed.
It may not be
possible to operate Infra-Red LEDs continuously at Max Current due to heat.
Range is affected
by Lens Transmittance, Camera Sensitivity & Spectral Response of Image
Sensor/Camera.
Best results will be
achieved by matching the 'Lens' Horizontal Angle-of-View and the LED
Radiation Angle (when Camera and Illuminator are positioned at the same
distance from subject and illumination of full width is required).
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