G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 23/00 (2006.01) G02B 7/12 (2006.01) G02B 23/18 (2006.01)
Patent
CA 2154492
Optical apparatus, and in particular, binoculars, having one or more self-adjusting eyepiece reticles that maintain a horizontal or vertical reticle position or orientation at any interpupillary distance adjustment. One embodiment of the optical apparatus comprises first and second bodies that house optical elements that are rotatable relative to each other around a predetermined axis. A rotatable reticle mount is disposed in the first body that is rotatable around its axis, and an eyepiece reticle is disposed in the rotatable reticle mount. A gear system is employed to rotate the reticle so that is has a fixed viewing orientation at any interpupillary distance. The gear system comprises a first bevel gear centered on the predetermined axis, a second bevel gear disposed on the rotatable reticle mount, and a drive shaft with ends having bevel gears connecting the first and second bevel gears. The drive shaft may be flexible, depending upon the design of the optical apparatus. The first and second gears have a gear ratio of 1:1. The optical apparatus may further comprise a second rotatable reticle mount disposed in the second body that is rotatable around its axis and a second gear system. The second gear system comprises a third bevel gear disposed on the second rotatable reticle mount 12a, and a second drive shaft with ends having bevel gears connecting the first and third bevel gears. A second embodiment of the optical apparatus employs bevel gears disposed on stationary objective lens mounts, gears disposed on rotatable reticle mounts and gear systems coupled between rotatable reticle mounts and stanonary objective lens mountsa.
Hughes Aircraft Company
Sim & Mcburney
LandOfFree
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