An apparatus and method of manufacturing a sighting device mountable to a gun to assist a shooter in aiming at a target. The apparatus comprises an optical element and a light source which provide feedback to the user regarding alignment with a target. The alignment aid optical element is a ring of transparent material with a user-facing, contoured surface—coated with a reflective material that reflects a narrow band of light wavelengths—with an inner and outer edge. The apparatus further comprises a light source coupled to a mount located at a focal point of the lens wherein the emission of light from the light source faces the lens. The wavelengths emitted from the light source correspond to those of the coatings on the lens.

An apparatus and method of manufacturing a sighting device mountable to a gun to assist a shooter in aiming at a target. The apparatus comprises an optical element and a light source which provide feedback to the user regarding alignment with a target. The alignment aid optical element is a ring of transparent material with a user-facing, contoured surface—coated with a reflective material that reflects a narrow band of light wavelengths—with an inner and outer edge. The apparatus further comprises a light source coupled to a mount located at a focal point of the lens wherein the emission of light from the light source faces the lens. The wavelengths emitted from the light source correspond to those of the coatings on the lens.

One aspect of the invention provides a telescope including: at least one lens or mirror arranged to receive collimated light defining an optical axis at a first end and form an image at a last end; and a narrowband interference filter positioned along the optical axis prior to the first end. The narrowband interference filter is tiltably mounted with respect to the optical axis. Another aspect of the invention provides an imager including: an optical collimator; a plurality of lenses or mirrors arranged relative to the optical collimator to receive collimated light from the optical collimator defining an optical axis at a first end and form an image at a second end; and a narrowband interference filter positioned along the optical axis between the optical collimator and the first end. The narrowband interference filter is tiltably mounted with respect to the optical axis.

One aspect of the invention provides a telescope including: at least one lens or mirror arranged to receive collimated light defining an optical axis at a first end and form an image at a last end; and a narrowband interference filter positioned along the optical axis prior to the first end. The narrowband interference filter is tiltably mounted with respect to the optical axis. Another aspect of the invention provides an imager including: an optical collimator; a plurality of lenses or mirrors arranged relative to the optical collimator to receive collimated light from the optical collimator defining an optical axis at a first end and form an image at a second end; and a narrowband interference filter positioned along the optical axis between the optical collimator and the first end. The narrowband interference filter is tiltably mounted with respect to the optical axis.

A kinematically engaged yoke system (KEYS) for multiple-order-diffraction engineered material may comprise a harness comprising a frame and a plurality of semi-kinematic keys disposed on the frame, wherein the semi-kinematic keys are configured based on a MOD-side mechanical profile of a plurality of segments of a multiple-order-diffraction engineered material, and wherein the MOD-side mechanical profile, when engaged with the semi-kinematic keys, functions as a fiducial that provides alignment between neighboring segments; and one or more shims disposed between one or more pairs of neighboring segments of the plurality of segments of the multiple-order-diffraction engineered material, wherein the one or more shims facilitate alignment of the one or more pairs of neighboring segments of the plurality of segments based on a translation across one or more surfaces of the one or more shims.

A telescope system (100) comprises a steering minor (M5) arranged in a part of its optical path (L5-L6) between a first telescope stage (10) and a second telescope stage (20). The steering mirror (M5) is configured to controllably rotate over a rotation angle (θm) for controlling a view angle (θv) of the telescope system (100) from the entrance aperture (A1). The steering mirror (M5) is disposed at an intermediate pupil (Pi) of the telescope system (100), at which position an image of the aperture stop (As) is formed by one or more of the optical components (M7,M6) there between.

A riflescope having a display that provides information to a user of the riflescope, along with related methods, is provided herein. In one embodiment, a riflescope includes an objective system and an ocular system, wherein a focal plane is defined between the objective system and the ocular system. A display system, comprising a display and a mirror, is positioned at a location between the focal plane and the ocular system. In one embodiment, the distance between the focal plane and the ocular system is equal to a sum of a distance between the display and the mirror and a distance between the mirror and the ocular system.

The invention relates to a Pivot hinge (1) for a Long-range optical Instrument (10), in particular binocular, comprising: at least two Joint Elements (2, 3) pivotable against each other about a Pivot Axis (4), and an Adjustment Device (5) for adjusting the pivot resistance and/or a Detent (26) between the Joint Elements (2, 3). In order to permit a more accurate and permanent adjustment and to facilitate a space-saving design, the Adjustment Device (5) comprises a Spreader Device (6) with at least one Spreader Element (7) adjustable along the Pivot Axis (4) and at least one Force Transfer Surface (16) that interacts with the Spreader Device (6) in order to transfer the spreading force of the Spreader Device (6) into a force acting from the Adjustment Device (5) on at least one Joint Element (2, 3), preferably in direction of the Pivot Axis (4).

The binocular bridge system is configured to couple two night vision monoculars together, effectively providing the user with a binocular night vision system. An example binocular bridge system comprises a bridge, two hinged arms, and two dummy battery inserts. Each dummy battery insert is configured to be positioned within the battery compartment of a night vision monocular and conductively connect it to a power source housed within the bridge. In some implementation, each hinged arm of the binocular bridge system includes an objective alignment ring. The hinged arms of such a binocular bridge system, in conjunction with the objective alignment rings, are configured to mechanically collimate the night vision monoculars secured thereto.

There are provided a reticle, a reticle unit, and an optical apparatus, such as a rifle scope, each having a novel configuration that allows formation of a desired pattern. In a reticle 30A.sub.1 on which a pattern that serves as an indicator when an object under observation is visually recognized is formed, the pattern is formed of protruding sections 33a and 33b provided on a pattern formation surface 31a of a plate-shaped optical member 31. The protruding sections 33a and 33b are each formed of a plurality of protruding ridges 133 (structural elements) extending in the lengthwise direction of a line that forms the pattern in parallel to the widthwise direction of the line. The protruding ridges 133 each have an inclining surface 140 inclining with respect to the optical path of an observation optical path, and the inclination angle of the inclining surface with respect to the optical axis Z is so set at an angle that causes light incident via an objective lens to be deflected to exit out of the observation optical path.