Back to results
US 7,742,228 B2Granted
Far-optical device
AssigneeSwarovski-Optik KG.
InventorAlbert Fiedler
Life of this patent
Estimating the term…
Abstract
A far-optical device comprising a reversal system (1) and an adjustable optical magnification means with more than fourfold magnification, wherein the far-optical device has an optical beam deflection means (2) which at all magnifications ensures a subjective field of view of the far-optical device of at least 22° at least for light of a wavelength of about 550 nm.
Claims22
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°.
2 more elements
A far-optical device comprising:
- a central tube disposed between an objective and an eyepiece and having a maximum 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 integral reversal system is disposed between an objective-side image plane and 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 an adjustable optical magnification having a zoom of greater than four times;
- an optical beam deflection means disposed on the side of the reversal system facing the eyepiece, such that, at a maximum magnification of the lens system, a total focal length for the reversal system is at most 11 mm.
1 more element
Dependencies are inferred from the claim text.