A sight includes a housing, a rangefinder assembly, a display screen provided in the housing and electrically connected to the rangefinder assembly, an objective lens set, an image inverter set, a reticle set, and an eyepiece set provided in the housing and sequentially arranged from an object side to an eye side, where the reticle set includes a first prism and a second prism cemented to each other, a reflective film is provided on a first cemented plane of the first prism and the second prism; the first prism has a first plane provided on an imaging plane; the second prism has a second plane perpendicular to the first plane; the first plane is provided with a reticle pattern; a light-emitting plane of the display screen is attached to the second plane; and the reflective film is configured to reflect light from the display screen to the eye side.

A sight includes a housing, a rangefinder assembly, a display screen provided in the housing and electrically connected to the rangefinder assembly, an objective lens set, an image inverter set, a reticle set, and an eyepiece set provided in the housing and sequentially arranged from an object side to an eye side, where the reticle set includes a first prism and a second prism cemented to each other, a reflective film is provided on a first cemented plane of the first prism and the second prism; the first prism has a first plane provided on an imaging plane; the second prism has a second plane perpendicular to the first plane; the first plane is provided with a reticle pattern; a light-emitting plane of the display screen is attached to the second plane; and the reflective film is configured to reflect light from the display screen to the eye side.

A dot sight includes a sight mount, a sight frame, a light source member, a collimator lens set, a reflector, and a beam splitter prism, where a first chamber is formed in the sight mount; the sight frame is provided at a circumferential side of the sight mount close to an eye side; a second chamber, and a through opening communicating the second chamber and the first changer are formed in the sight frame; the light source member is provided at an end of the first chamber close to an object side, and configured to emit light to the eye side; the collimator lens set is provided in the first chamber; the reflector is provided in the first chamber, and corresponding to the through opening; the beam splitter prism is provided in the second chamber; and an axial position of the light source member is adjustable.

A dot sight includes a sight mount, a sight frame, a light source member, a collimator lens set, a reflector, and a beam splitter prism, where a first chamber is formed in the sight mount; the sight frame is provided at a circumferential side of the sight mount close to an eye side; a second chamber, and a through opening communicating the second chamber and the first changer are formed in the sight frame; the light source member is provided at an end of the first chamber close to an object side, and configured to emit light to the eye side; the collimator lens set is provided in the first chamber; the reflector is provided in the first chamber, and corresponding to the through opening; the beam splitter prism is provided in the second chamber; and an axial position of the light source member is adjustable.

The invention describes a focal length extender for a telescopic imaging system with interchangeable viewing eyepieces, including a cylindrical housing, which has a first and a second stop plane which are perpendicular to its cylinder axis in the direction of the light with associated connecting elements to the telescope body and for interchangeable viewing eyepieces and in which the housing has a relay lens arranged between the first stop plane and the second stop plane, wherein the relay lens is divided in two and consists of a first positive, neutral or negative lens element and a further negative lens element, wherein between the first and the further lens element, a beam splitter surface is arranged downstream at an angle to the optical axis of the imaging system and the first and further lens element together with the distance therebetween has an overall negative refractive power.

The invention describes a focal length extender for a telescopic imaging system with interchangeable viewing eyepieces, including a cylindrical housing, which has a first and a second stop plane which are perpendicular to its cylinder axis in the direction of the light with associated connecting elements to the telescope body and for interchangeable viewing eyepieces and in which the housing has a relay lens arranged between the first stop plane and the second stop plane, wherein the relay lens is divided in two and consists of a first positive, neutral or negative lens element and a further negative lens element, wherein between the first and the further lens element, a beam splitter surface is arranged downstream at an angle to the optical axis of the imaging system and the first and further lens element together with the distance therebetween has an overall negative refractive power.

An optical device includes a digital visual data system, a forward optical assembly, and an elevation manual adjustment and a windage manual adjustment. The elevation manual adjustment and the windage manual adjustment are configured to adjust a position of a movable optical assembly containing an optical merging assembly independently moveable in relation to the forward optical assembly. The optical merging assembly includes a first wedge-shaped component receiving optical data from the forward optical assembly and a second wedge-shaped component adjacent to the first wedge-shaped component that receives and transmits the optical data from the first wedge-shaped component through the second wedge-shaped component toward an eyepiece assembly and that reflects digital visual data from a micro-display toward the eyepiece assembly to present a merged data view when viewed through the eyepiece assembly.

An optical device includes a digital visual data system, a forward optical assembly, and an elevation manual adjustment and a windage manual adjustment. The elevation manual adjustment and the windage manual adjustment are configured to adjust a position of a movable optical assembly containing an optical merging assembly independently moveable in relation to the forward optical assembly. The optical merging assembly includes a first wedge-shaped component receiving optical data from the forward optical assembly and a second wedge-shaped component adjacent to the first wedge-shaped component that receives and transmits the optical data from the first wedge-shaped component through the second wedge-shaped component toward an eyepiece assembly and that reflects digital visual data from a micro-display toward the eyepiece assembly to present a merged data view when viewed through the eyepiece assembly.

A bifocal anastigmatic telescope with five aspherical mirrors, comprises: a concave first mirror, a convex second mirror, a concave third mirror and a first detector, which are common to a first and second focal length of the telescope, a first fourth mirror and a first fifth mirror that are associated with the first focal length, and a second fourth mirror and a second fifth mirror that are associated with the second focal length, the first mirror and the second mirror being arranged to form, from an object at infinity, an intermediate image situated between the second mirror and the third mirror, and for each focal length: the fixed positions and forms of the mirrors associated with the focal length being determined from the generalized Korsch equations with 5 mirrors, with the constraint of the first, second and third mirror and of the first focal plane that are common to the two focal lengths, and so as to optimize the image quality in the first focal plane of the telescope in accordance with a predetermined criterion.

A bifocal anastigmatic telescope with five aspherical mirrors, comprises: a concave first mirror, a convex second mirror, a concave third mirror and a first detector, which are common to a first and second focal length of the telescope, a first fourth mirror and a first fifth mirror that are associated with the first focal length, and a second fourth mirror and a second fifth mirror that are associated with the second focal length, the first mirror and the second mirror being arranged to form, from an object at infinity, an intermediate image situated between the second mirror and the third mirror, and for each focal length: the fixed positions and forms of the mirrors associated with the focal length being determined from the generalized Korsch equations with 5 mirrors, with the constraint of the first, second and third mirror and of the first focal plane that are common to the two focal lengths, and so as to optimize the image quality in the first focal plane of the telescope in accordance with a predetermined criterion.