Optical apparatus

Details Optical apparatus Optical apparatus

1986-05-09

1990-06-19

Tarcza, Thomas H.

G02B 960

Patent

active

049347713

ABSTRACT:
Optical viewing apparatus has an obective lens for focussing radiation from a scene or object to form an image on a detector and means for producing a visible display of the image which is viewed through an eye-piece lens. The objective lens is designed to impose a substantial level of barrel distortion on the image and the eye-piece lens imposes a substantial level of pincushion distortion on the observer's view to give improved central resolution. The radiation focussed by the objective lens may be visible or invisible, e.g. infra-red.

REFERENCES:
patent: 4178075 (1979-12-01), Rogers
patent: 4196969 (1980-04-01), Itoh

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