Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-07-11
2006-07-11
Le, Que T. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S214100
Reexamination Certificate
active
07075056
ABSTRACT:
A detector system, filter therefor, and method of making same is disclosed. The filter includes an interference element having a reflection band disposed primarily in the near infrared, and having a high transmission over most of the visible region. The filter also includes an absorptive element that absorbs light non-uniformly over the visible region. The filter when combined with a semiconductor photodiode or other suitable detector yields a detector system whose spectral responsivity closely matches the visual response of the human eye.
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Harada Takashi
Mizuno Kazuhiko
Nevitt Timothy J.
Ouderkirk Andrew J.
Wheatley John A.
Higgins Milena G.
Le Que T.
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