Optical viewing apparatus
OwnerKenneth B. Thompsoninventor
Life of this patent
Estimating the term…
Abstract
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.
Claims16
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.
Optical viewing apparatus, comprising:
- a concave, substantially spherical mirror;
- an image intensifier along the optical axis of said mirror, said image intensifier having curved entrance and exit image faces, said exit face being substantially coincident with the principal focal surface of said mirror;
- an objective lens system for producing a real image substantially coincident with the curved entrance face of said image intensifier;
- dual reflection, erecting prism means between said lens system and said image intensifier;
- and
- a partially reflecting, partially transmitting beamsplitter interposed between said image intensifier and said concave mirror.
Optical viewing apparatus, comprising:
- an eyepiece unit including a pair of substantially identical concave mirrors having mutually perpendicular optical axes intersecting at a partially reflecting, partially transmitting beamsplitter interposed between said mirrors, said beamsplitter dividing input light energy to said eyepiece unit between said pair of mirrors and enabling superposition of the output images produced by said mirrors;
- an image intensifier having entrance and exit image faces, said exit face being substantially coincident with the common principal focal surface of both of said concave mirrors;
- a wide angle objective lens system for producing a real image substantially coincident with the entrance face of said image intensifier;
- and
- dual reflection, erecting prism means between said lens system and said entrance face of said image intensifier.
Dependencies are inferred from the claim text.