Patent ID: 7742228
Filing Date: 2010-06-22
Classification: G02B

Abstract:
1. A far-optical device comprising: a central tube disposed between an objective and an eyepiece and having a maximums outside diameter of about 35 mm; wherein the central tube includes a lens system containing a reversal system integral with an adjustable optical magnification means, wherein the reversal system is disposed between an objective-side image plane and an eyepiece-side image plane, wherein the objective-side image plane is between the objective and the objective-side of the reversal system and the eyepiece-side image plane is between the eyepiece and the eyepiece-side of the reversal system, and wherein the reversal system is for reproducing an intermediate image produced by the objective at the objective-side image plane with a changeable imaging scale and in an upright position at the eyepiece-side image plane and with an adjustable optical magnification having a zoom greater than four times; and an optical beam deflection means disposed on the side of the reversal system facing the eyepiece, such that at all magnifications of the lens system, a subjective field of view of the far-optical device is at least 22°.