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Optical viewing apparatus

  • US 4,124,798 A
  • Filed: 12/09/1965
  • Issued: 11/07/1978
  • Est. Priority Date: 12/09/1965
  • Status: Expired due to Term
First Claim
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1. Optical apparatus, comprising:

  • a concave, substantially spherical reflecting surface;

    an image intensifier along the optical axis of said reflecting surface and having entrance and exit image faces, said exit face being substantially coincident with the focal surface of said reflecting surface;

    an optical objective system for producing an image substantially coincident with the entrance face of said image intensifier; and

    a partially reflecting, partially transmitting beamsplitter interposed between said image intensifier and said reflecting surface.

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