An actuator system includes a frame configured to remain stationary relative to a carriage within the frame and connected to the frame by a flexure assembly configured to constrain the carriage for only linear motion along an axis of the actuator system. A rotary base is configured to receive rotational input. Cross-blade flexures operatively connect the carriage to the rotary base, the cross-blade flexures including a plurality of blade flexures and being oriented at an oblique angle to the rotary base and to the axis of the actuator system. A rotary flexure operatively connects the rotary base to the frame. The cross-blade flexures and the rotary flexure are configured to convert rotary motion of the rotary base into linear motion of the carriage and to maintain axial and lateral stiffness.

In various embodiments, one or more prisms are utilized in a wavelength beam combining laser system to regulate beam size and/or to provide narrower wavelength bandwidth.

In various embodiments, one or more prisms are utilized in a wavelength beam combining laser system to regulate beam size and/or to provide narrower wavelength bandwidth.

Provided herein is technology relating to telescopic optics and particularly, but not exclusively, to devices and methods for moving a lens in a variable power optical device zoom system. The technology provides multiple followers per lens cell to move a lens with minimal or no reticle jump and finds use in, e.g., rifle scopes and other sensitive optic systems and devices.

A virtual displaying device used on a telescopic sight includes a sleeve sleeved around an eyepiece portion of the telescopic sight, a virtual assembly and a fixing portion for fixing the sleeve and the virtual assembly to the eyepiece portion. The virtual assembly includes a housing, a virtual member and a displaying screen both received in the housing. Light emitted from the displaying screen passes through the virtual member to be zoomed, shifted and then projected, together with light of the eyepiece, near distance of eye relief of the telescopic sight so that a shooter can simultaneously and clearly see both the target inside the eyepiece and contents displayed on the displaying screen. The present structure above can allow the shooter to obtain important shooting information while aiming at a target and greatly improve the efficiency of the telescopic sight.

A focusing device includes a substrate and a plurality of scatterers provided at both sides of the substrate. The scatterers on the both sides of the focusing device may correct geometric aberration, and thus, a field of view (FOV) of the focusing device may be widened.

A focusing device includes a substrate and a plurality of scatterers provided at both sides of the substrate. The scatterers on the both sides of the focusing device may correct geometric aberration, and thus, a field of view (FOV) of the focusing device may be widened.

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.

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.

The invention relates to a long-range optical device, in particular a telescopic sight 1, with at least one objective lens 2 and at least one eyepiece 3 and with an adjustable reticle 6 arranged between the objective lens 2 and the eyepiece, wherein the reticle 6 is coupled to a manually operable fast reticle adjustment, wherein a display device 14 is arranged in the field of view of the long-range optical device 1, through which a distance value set by a setting device 4, 15 of the fast reticle adjustment can be read when using the long-range optical device 1.