Multiwavelength smoke detector using white light LED

Details Multiwavelength smoke detector using white light LED Multiwavelength smoke detector using white light LED

2007-06-19

2007-06-19

Pham, Toan N. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S629000, C340S630000

Reexamination Certificate

active

10835930

ABSTRACT:
A smoke detector includes a smoke detection chamber containing a white light LED and a light detector. The light detector detects light within at least two distinct optical wavelength bands, and generates respective signals indicative of the intensities of the detected light. An analyzer determines, based on the measured light intensities of the different wavelength bands, whether a dangerous smoke/fire condition is present.

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