Multi-way LED-based chemochromic sensor

Details Multi-way LED-based chemochromic sensor Multi-way LED-based chemochromic sensor

2006-03-07

2006-03-07

Snay, Jeffrey R. (Department: 1743)

Chemistry: analytical and immunological testing

Optical result

C436S169000, C422S082050, C422S082090, C422S091000

Reexamination Certificate

active

07008795

ABSTRACT:
A chemochromic sensor includes multiple bi-directional LEDs, each optically aligned with one or more test areas. Each LED is used as both a light emitter when driven in forward bias, and as a light detector when driven in reverse bias. By alternating the bias on the LEDs, multi-way light measurements of the test area can be obtained.

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patent: 5408092 (1995-04-01), Maurice et al.
Benson et al., “Low-cost fiber-optic chemochromic hydrogen gas detector,” Proceedings of the 1999 U. S. DOE Hydrogen Program Review, 1999.

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