Photopic detector system having a filter with an interference element, an absorptive element and an absorber or reflector
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United States of America Patent
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Jul 11, 2006
Grant Date -
Oct 13, 2005
app pub date -
May 21, 2003
filing date -
May 21, 2002
priority date (Note) -
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status (Latency Note)
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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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