Abstract: The present invention is an image intensifier assembly that includes a Generation III image intensifier tube and an inverter lens arrangement, such that the present invention image intensifier assembly can be substituted for a Generation II image intensifier tube in a given application. The inverter lens arrangement is adjustably positionable relative to the Generation III image intensifier tube so the image relayed can be focused to optimize the resolution of the complete tube assembly.

Abstract: The endoscope system of this invention is formed of an endoscope having an insertable part provided in the tip part with an illuminating window and a receiving window receiving an object image illuminated by an illuminating light emitted from the illuminating window and a plurality of sheaths selectively and removably connected to the endoscope, inserted through the insertable part when connected to the endoscope and having respectively different functions.

Abstract: An apparatus for recording an image with a plurality of laser beams on a recording surface comprises a plurality of laser source units each generating a laser beam and a first lens for directing the laser beam from each one of the plurality of laser source units to the recording surface. In the apparatus, the laser source units are each disposed on a holding member in such a manner that the principal ray of the laser beam therefrom passes through a front focal point of the first lens. Thus, the apparatus is advantageous in that it is not necessary to employ an enlarged lens despite increase in the number of the laser source units, or the channel numbers.

Abstract: Space savings are effected in the optical output system of a laser velocimeter. The output system comprises pairs of optical fibers having output ends from which a beam of laser light emerges, a transfer lens for each light beam, and at least one final (LV) lens for receiving the light passing through the transfer lenses and for focussing that light at a common crossing point or area. In order to closely couple the transfer lenses to the final lens, each transfer lens is positioned relative to the final lens receiving light therefrom such that the output waist of the corresponding beam received by the final lens from the transfer lens is a virtual waist located before the transfer lens.

Abstract: A sideview mirror includes a housing having an inner tubular member and an outer tubular member. The housing has a main pipe and a branching pipe extending laterally from a center portion of the main pipe. An object lens system is arranged in a rearward portion of the main pipe, and an eye lens system is arranged in the branching pipe. A blowing device is provided in the forward portion of the main pipe. The main pipe further includes a reflecting member in its center portion to form a predetermined angle with respect to an optical axis of the eye lens system. The blowing device includes a cover plate which has through holes as air apertures and a movable plate having air apertures. The air apertures of the cover plate and the movable plate may be selectively aligned to allow air to enter the mirror. An air guider is provided to guide the entering air to the object lens system and the eye lens system.

Abstract: A real image type finder optical system comprising, in order from the object side, an objective lens, a reticle, a condenser lens and an eyepiece lens. The reticle has a surface of incidence which is located in the vicinity of a plane on which a primary image is to be formed by the objective lens and is configured so as to diffuse a light bundle in different directions by central portion and marginal portion thereof. This finder optical system is capable of forming a sharp image with distortion favorably corrected, has high accuracy for detecting a focused condition and can be composed compactly.

Abstract: A nonimaging radiant energy device may include a hyperbolically shaped reflective element with a radiant energy inlet and a radiant energy outlet. A convex lens is provided at the radiant energy inlet and a concave lens is provided at the radiant energy outlet. Due to the provision of the lenses and the shape of the walls of the reflective element, the radiant energy incident at the radiant energy inlet within a predetermined angle of acceptance is emitted from the radiant energy outlet exclusively within an acute exit angle. In another embodiment, the radiant energy device may include two interconnected hyperbolically shaped reflective elements with a respective convex lens being provided at each aperture of the device.

Abstract: The field of the disclosure is that of enlarging optical lenses and, more precisely, binocular optical systems designed to be inserted into the night-time channel of an observation system, between a light intensifier tube and an observer's eyes. The disclosure can be applied especially to observation instruments for armored vehicles and, notably, periscopes for tanks. The disclosed optical system for a binocular device is of the type constituted by two groups, a forward group and a rear group, the rear group being constituted by a bonded doublet with plane rear face comprising a convergent convex lens bonded to a divergent lens, the lenses of the bonded doublet having different and complementary dispersions to compensate for the chromatism, and the focal length of the doublet ranging from 0.85F to 1.05F, where F is the focal length of the binocular device.

Abstract: A stereoscopic objective lens system for video endoscopes and borescopes includes two full-diameter doublets and a double set of two half-diameter identical doublets. The full-diameter doublets collimate object points, imaging object points to infinity. The large collimator doublets present equal-angle pairs from symmetrically disposed object points to the small stereo doublet pairs. This equal-angle property enables accurate object/image mapping onto the final stereo image pair, such that all parts of each left/right image can be mapped to within a fraction of a video pixel to each other.

Abstract: Alignment difficulties in optical computing arrangements are overcome by integrating the optical components on a single substrate and arranging the elements in a manner that causes them to interact with one another to perform the desired function. The substrate has one or two major surfaces and the elements are grown or fabricated on those surfaces using conventional integrated circuit manufacturing techniques. Most advantageously, the position-sensitive optical devices are manufactured on one side. Reflective planar optical devices are obtained by applying a reflective layer over the fabricated planar optical devices.

Abstract: A system of matching optics for gaussian beams. The matching optics system is positioned between a light beam emitter (such as a laser) and the input optics of a second optics system whereby the output from the light beam emitter is converted into an optimum input for the succeeding parts of the second optical system. The matching optics arrangement includes the combination of a light beam emitter, such as a laser with a movable afocal lens pair (telescope) and a single movable lens placed in the laser's output beam. The single movable lens serves as an input to the telescope. If desired, a second lens, which may be fixed, is positioned in the beam before the adjustable lens to serve as an input processor to the movable lens. The system provides the ability to choose waist diameter and position independently and achieve the desired values with two simple adjustments not requiring iteration.