Abstract: Disclosed is a mast intended to equip a marine or submarine vessel. The mast includes a metal structure extending along an axis and a fairing arranged externally to the structure in a direction normal to the axis. The fairing is removably assembled to the structure.

Abstract: A system described herein includes a first lens, a first image stabilization unit and a first image plane. When seen from the first lens in the direction of the first image plane, the order in which the elements are arranged along a first optical axis is as follows: first lens, first image stabilization unit and first image plane. The first image stabilization unit has at least one first inlet surface and at least one first outlet surface. The first inlet surface is oriented towards the first lens. The first outlet surface is oriented towards the first image plane. Furthermore, the first outlet surface is spaced apart from the first image plane in a range of 1 mm to 20 mm.

Abstract: A gimbal mechanism for a turret includes a support member and a pair of opposing yoke arms extending from the support member. The pair of opposing yoke arms define a first axis. A sphere is rotatably mounted between the opposing yoke arms for rotation about the first axis. A disk is rotatably mounted within the sphere for rotation about a second axis perpendicular to the first axis. The disk is sized for rotation within the sphere. The second axis may be offset from the first axis. An aperture is provided in the disk. The sphere includes a slot within which the aperture is moveable in response to rotation of the disk about the second axis. The aperture is movable to define a field of coverage in response to rotation of the sphere about the first axis and the disk about the second axis.

Abstract: Telescope assembly for tracking celestial bodies, comprising a telescope and a positioning device for the telescope, wherein the positioning device is provided with an under frame to be placed on a base, a first telescope holder placed on the under frame, a second telescope holder which at a first side is coupled to the first telescope holder and which bears the telescope, wherein the telescope assembly is provided with a third telescope holder which is coupled to a second side of the second telescope holder and which by means of a third rotary bearing can be rotated about a polar axis of rotation.

Abstract: Regarding a sighting telescope comprising a reversing system which is configured between an objective and is fitted an ocular and fitted with an objective-proximate field lens and at least two mutually displaceable optical elements near the ocular, further comprising an objective-proximate image plane situated between the objective and the field lens and spaced from latter, further with an ocular-proximate image plane situated between the reversing system and the ocular, where, when displacing the said optical elements, an intermediate image projected by the objective into the ocular-proximate image plane is erected and reproduced at a variable magnification in the ocular proximate image plane, and at a magnification of at least 4×, the invention stipulates configuring a correcting field lens element between the objective-proximate image plane and the field lens.

Abstract: A far-optical device comprising a reversal system and an adjustable optical magnification means with more than fourfold magnification, wherein the far-optical device has an optical beam deflection means 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.

Abstract: Telescope assembly for tracking celestial bodies, comprising a telescope and a positioning device for the telescope, wherein the positioning device is provided with an under frame to be placed on a base, a first 5 telescope holder placed on the under frame, a second telescope holder which at a first side is coupled to the first telescope holder and which bears the telescope, wherein the telescope assembly is provided with a third telescope holder which is coupled to a 10 second side of the second telescope holder and which by means of a third rotary bearing can be rotated about a parallactic axis of rotation.

Abstract: An optical sighting device includes an electronic controller that is responsive to changes in an optical magnification of the sighting device to resize at least a portion of a reticle produced by an electronic display or other means proximate a focal plane of the sighting device. In some embodiments, the reticle is located proximate a rear focal plane of the sighting device and may be scaled by the electronic controller in concert with changes in optical magnification to simulate a front focal plane reticle. A functional pattern of the reticle may also be automatically changed at different magnification settings to provide different types of reticles, such as CQB and sniper reticles, in a single optical device.

Abstract: Regarding a sighting telescope comprising a reversing system which is configured between an objective and is fitted an ocular and fitted with an objective-proximate field lens and at least two mutually displaceable optical elements near the ocular, further comprising an objective-proximate image plane situated between the objective and the field lens and spaced from latter, further with an ocular-proximate image plane situated between the reversing system and the ocular, where, when displacing the said optical elements, an intermediate image projected by the objective into the ocular-proximate image plane is erected and reproduced at a variable magnification in the ocular proximate image plane, and at a magnification of at least 4×, the invention stipulates configuring a correcting field lens element between the objective-proximate image plane and the field lens.

Abstract: Disclosed is an optical scope including an objective lens, an eyepiece lens, and a reticle, wherein a field lens having negative power is disposed in at least one of a front and a back of the reticle disposed on an image formation surface of the objective lens to increase eye-relief.

Abstract: An optical device is adapted for coupling to a camera lens so as to form a visual observation system. The optical device includes a housing, a connecting unit disposed at the housing, a first lens set disposed in the housing and having a negative optical power, a prism unit located at an image side of the first lens set in the housing, and a second lens set located at an image side of the prism unit in the housing and having a positive optical power. The connecting unit includes a camera lens bayonet for connecting to the camera lens. The prism unit has a light-entrance surface and a light-exit surface. An image formed by light beams exiting the light-exit surface is erected with respect to an inverted image formed by light beams entering the light-entrance surface.

Abstract: A far-optical device comprising a reversal system and an adjustable optical magnification means with more than fourfold magnification, wherein the far-optical device has an optical beam deflection means 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.

Abstract: A pair of binoculars is provided with a second bridge portion on which a portion for fitting an adapter for attaching a tripod is provided near to the center of gravity of the binoculars with a given space in the optical axis direction from a first bridge portion that is provided to the objective lens side, thereby capable of preventing a shake upon attaching a tripod through the adapter.

Abstract: A multi-telescope imaging system includes a first telescope and a second telescope, each telescope having an input line of sight, a ray path that is incident upon a focal surface imaging location at a non-normal angle of incidence, and a shutter lying on the ray path. A single common sensor lies at the focal surface imaging location, such that the first-telescope ray path and the second-telescope ray path are alternatingly incident upon the same focal surface imaging location of the sensor. A shutter controller alternatingly opens and closes the two shutters, so that the sensor alternatingly views the scenes imaged by the two telescopes.

Abstract: A book cover for binding a book block includes a cover blank, a cover image provided on the cover blank, and an alignment feature associated with the cover blank. The cover image defines an image field of the cover blank and the alignment feature is registered to a center line of the image field. As such, the cover blank can be aligned in a book binder when the book block is bound with the book cover by the book binder.

Abstract: A panoramic periscope includes a central body (3, 3A) and a rotating head-piece (9) supported on the central body. Inside the central body, an optical path (21, 23, 101, 105, 109, 111, 113) for an optical beam (F,) coming from the head-piece (9) is provided. A viewing module (17) receives the optical beam, for observing the external scenery. A laser telemeter (19) is provided and, along the optical path, a separator element (10S) with an inner dichroic surface (105A) is passed through by the optical beam coming from the head-piece (9). The inner dichroic surface (105A) separates a laser beam coming from the head-piece (9) and deviating it towards a separate optical path (107) which conveys the laser beam towards the laser telemeter (19). The separator element (105) has an entry surface (105I) and an exit surface (105U) which are parallel with one another and passed through by the optical beam (FV), the surfaces being perpendicular to the optical beam (FV).

Abstract: An alignment and stabilization system that automatically aligns and stabilizes off-gimbal electro-optical passive and active sensors. The system dynamically boresights and aligns one or more sensor input beams and an output beam of a laser using automatic closed loop feedback. The system includes a reference light (photo) detector, or reference source, disposed on a gimbal, off-gimbal optical-reference sources, or corresonding photodetectors, and two alignment mirrors. Aligning the one or more sensors and laser to the dynamically steered null of the on-gimbal reference photodetector (or reference source) is equivalent to having the sensors and laser mounted on the stabilized gimbal with alignment mirrors providing a common optical path for enhanced stabilization of the sensors and laser lines of sight.

Abstract: An all-reflective optical system includes an entrance aperture, an exit aperture, and a dichroic beam splitter assembly. The dichroic beam splitter assembly includes an entrance dichroic beam splitter and an exit dichroic beam splitter. The reflected portion of the beam from the entrance dichroic beam splitter passes to a first beam processing array having an odd number of powered mirrors. The transmitted portion of the beam from the entrance dichroic beam splitter passes to a second beam processing array having an odd number of flat mirrors. The second beam processing array and the first beam processing array are circumferentially angularly displaced by about 90 degrees of rotation about an optical reference axis. The dichroic beam splitter assembly, the first beam processing array, and the second beam processing array together comprise a single optical unit rotatable about the optical reference axis, and a bearing set is provided to accomplish the rotation.

Abstract: A method and apparatus for holding a line of sight in a scanning imaging system wherein there is continuous relative movement between the field of view of the system and an image plane. A descan mechanism temporarily holds a line of sight within a field of regard as a scanning mechanism such as a gimbal continuously moves imaging optics relative to the object space. The descan mechanism descans the image, the descan mechanism's relative movement being opposite to the direction of movement of the gimbal, so as to hold a line of sight for a time period and thereafter snap to a new field of view to thereafter descan the new line of sight for another time period. With the present invention a scanning system can be used with an imaging device requiring time integration for greater sensitivity, such as a staring electronic detector array or photographic film, without necessitating the physical scanning motion to be cyclically stopped and restarted.

Abstract: A stabilized imaging system in which the lens assembly is fixed, and an electro-optic imager element is moveable to compensate for three-dimensional movements of the surrounding structure. Preferably the optical train also includes a movable prism, which can rotate the field of view in one plane. Rotation of the imager compensates for the image rotation caused by rotation of the prism.

Abstract: An optical arrangement includes an infrared imaging system operating in conjunction with a first beam having wavelengths less than 15 microns, and a coherent infrared source generating a second beam having wavelengths shorter than the first beam wavelengths. Also provided is an objective lens arrangement including an objective lens having an aperture formed in one side of the objective lens. A partially reflective member is located between the objective lens arrangement, and the imaging system and infrared source. A T.V. camera is provided for receiving an image through the objective lens aperture. The first beam is directed to the imaging system from a region being imaged, and the second beam is directed from the infrared source to the region being imaged. The respective beams are directed to the partially reflective member so as to cause the respective beams to pass through the objective lens along substantially the same optical path as each other.

Abstract: The system comprises a focusing optics in the focal plane of which a linear array of photodetectors is disposed. A double prism located opposite to said photodetectors with respect to said focusing optics, is servo controlled in rotation relative to a support about its longitudinal axis perpendicular to the axis of said optics, said support being itself servo controlled in rotation about said optical axis in order to scan a space of about 2 .pi. steradians. A derotating prism aligned with said optical axis rotates about said optical axis at a speed half of that of said double prism, in order to hold the image of the target in a single direction in said focal plane, whatever the rotations of said support.

Abstract: A surveillance device in the form of a fake radio aerial which projects from the roof of a vehicle. There is an upright periscope in the aerial which can rotate through 360.degree.. In the vehicle the light from the periscope is bent through 90.degree. and viewed by a camera all of which fits in the headliner space of the vehicle and so is not visible.

Abstract: A stabilized imaging system in which the lens assembly is fixed, and an electro-optic imager element is moveable to compensate for three-dimensional movements of the surrounding structure. Preferably the optical train also includes a movable prism, which can rotate the field of view in one plane. Rotation of the imager compensates for the image rotation caused by rotation of the prism.

Abstract: An optical system and method for rotating an image of an object is disclosed. The device consists of a plurality of optical surfaces for either reflecting or refracting the light along an optical path through the device. The optical surfaces divide the optical path into optical path segments which intersect at predetermined angles. These angles are selected to minimize polarization of the output light. The optical path segments lie in more than one plane.

Abstract: An infrared thermographic optical scanner is comprised of a first optomechanical device fitted with an entrance objective, at least a raster scan element, and a plane of infrared detectors on which the infrared radiation is focused in the form of lines. Further, there is provided a second optomechanical device made up of an orientable tilted periscope-head mirror and a derotator. The derotator is maintained clamped with respect to the head mirror coupling means for operation in the panoramic mode in a predetermined first angular position such that all lines scanned are parallel to each other, the raster scanning movement being obtained by maintaining the position of the raster element fixed, and by simultaneously causing the rotation of the head mirror, and at half-speed, causing the rotation of the derotator.

Abstract: The present optical system provides an all-reflective afocal reimaging system. A reflective system receives, by means of an entrance aperture, and reflects radiation or light through the system such that the radiation or light is imaged and recollimated as it is reflected through the system. The radiation or light exits at an exit aperture which is an image of the entrance aperture. High quality images of both the collimated scene and reimaged aperture are formed by the optical system. Embodiments are shown by which the optical system can be used as an optical derotation device by the inclusion of two planar mirrors located near the entrance and exit apertures.