System for incorporating additional information in the...

G - Physics – 02 – B

Patent

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G02B 23/10 (2006.01)

Patent

CA 1245492

27354-3 ABSTRACT OF THE DISCLOSURE A system for superimposing information on the optical path of a telescope is described. A slide or film strip containing a map sector and angle information is carried in a holder out of the optical path. An arm containing optics can he swung into and out of the optical path to transmit the image contained on the slide or film strip to the optical path as desired. Rotation of the image can be achieved in one embodiment by means of a thumb- wheel connected to the slide holder whereby the slide itself can be rotated. In another embodiment rotation of an optical prism assembly forming part of the optics is used to achieve image rotation. Another thumb-wheel is used for that.

451528

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