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Multi-channel optical time-sharing apparatus having a rotating filter wheel with position-encoding means

  • US 3,963,351 A
  • Filed: 04/14/1975
  • Issued: 06/15/1976
  • Est. Priority Date: 04/14/1975
  • Status: Expired due to Term
First Claim
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1. In a multi-wavelength optical instrument of the type including a plurality of optical channels provided with respective gain equalizer means and signal detection means, a rotating filter member having a plurality of wavelength filters spaced around its axis to define said optical channels and provided with a supporting shaft having a hollow portion, means to illuminate said hollow shaft portion internally, respective signal-generating photosensitive means associated with the gain equalizer means and the signal detection means mounted externally adjacent said hollow shaft portion, said hollow shaft portion having means formed to illuminate said respective photosensitive means so as to generate respective cyclic sets of long and short pulses, and means to decode said pulses to derive respective cyclic gating pulses for said gain equalizer means and signal detection means.

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