Binocular telescope with off axis reflectors

G - Physics – 02 – B

Patent

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88/18

G02B 23/06 (2006.01)

Patent

CA 1093355

Hale 6 c/w BINOCULAR TELESCOPE WITH OFF AXIS REFLECTORS ABSTRACT OF THE DISCLOSURE A binocular telescope having two separate, essentially identical, optical systems. Primary reflector of each system is an off-axis paraboloid, the axis being at an edge of, or clear off the primary reflector. The diagonal plane mirrors or 45° prisms of conventional Newtonian telescopes are eliminated by using modified Porro prisms which produce corresponding images near adjacent inner portions of each optical system. Line joining axes of eye piece is inclined to optical axes for comfortable viewing. The off-axis primary mirrors cause less block- age than prior art Newtonian reflectors and in one exemplification the blockage is eliminated completely. The optical axes are set to be parallel by a simple collimation procedure. Interocular adjustment is attained by swinging the optical systems relative to each other about a hinge axis which is parallel to optical axes, thus altering axial separation whilst maintaining the optical axes parallel.

290234

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