Optical: systems and elements – Compound lens system – Telescope
Patent
1992-10-29
1994-10-18
Look, Edward K.
Optical: systems and elements
Compound lens system
Telescope
359431, 359504, G02B 308
Patent
active
053573676
ABSTRACT:
A spyhole viewer, mountable in a wall surface is disclosed and provides a wide angle view, while requiring a small diameter mounting hole. An objective lens system produces a real inverted image, a reflector angularly deflects light from the objective lens system, and an erector, located behind an element of objective lens system, erect the image. Further, a image surface upon which the image will appear, and a projection viewing lens are provided. The image optical axis is angularly deflected at least once between the objective and viewing lens systems.
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Look Edward K.
Sgantzos Mark
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