Author Topic: Finger tracking IR light source: heat lamp?  (Read 5470 times)

Offline mhowison

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on: October 22, 2009, 10:37:11 PM
Is there any reason not to try a 250W heat lamp instead of an IR LED array as the light source for the finger tracking application? This would provide one or two orders of magnitude more IR radiation than an LED array, no?



Offline boonjin

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Reply #1 on: October 23, 2009, 12:48:59 AM
Is there any reason not to try a 250W heat lamp instead of an IR LED array as the light source for the finger tracking application? This would provide one or two orders of magnitude more IR radiation than an LED array, no?

Hi,

The user will be most probably facing the lamp/array and thus having a high powered device with such amount of radiation may cause discomfort to the user. The IR array seems to be unobstructive to most use cases.

Furthermore, the heat lamp's emitted wavelength may not be capture effectively by the Wiimote. Without modifying the Wiimote's bandpass filter, IR LEDs of a wavelength of approximately 940nm currently shown to be the detected most sensitively by the Wiimote.

Regards,
Boon Jin

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