Non-heavy metal optical bandpass filter in electro-optical...

Details Non-heavy metal optical bandpass filter in electro-optical... Non-heavy metal optical bandpass filter in electro-optical...

2007-02-20

2007-02-20

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S216000, C359S885000

Reexamination Certificate

active

11225321

ABSTRACT:
Heavy metals such as cadmium are not employed in optical bandpass filters employed in electro-optical readers to comply with governmental regulations concerning endangering the environment.

REFERENCES:
patent: 4969716 (1990-11-01), Scobey et al.
patent: 2003/0209669 (2003-11-01), Chou

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