Abstract: A holographic display system having a dynamic image source including selectively activated light emitting diodes for providing spectrally narrowband and narrow beam imaging illumination through an apertured mask, and further having a mirror reflection hologram for reflecting the image to provide an observable virtual image. The image source further includes a polarizer and an optional diffuser.

Abstract: A rearview mirror for motor vehicles includes a support body of dish-like configuration in which adjusting devices for adjusting the position of the mirror are mounted. The support body includes a casing with seats for supporting electrical drive members and transmission mechanisms which engage the mirror to pivot the mirror about at least two perpendicular axes. The casing and the seats for the drive members and transmission mechanisms are formed of integral one piece constuction with the support body.

Abstract: In an optical system a semitransparent mirror which is disposed at a predetermined angle with respect to an optical axis and which has a semitransparent surface (for instance, a front surface) and a transparent surface (for instance, a rear surface) is so designed as to split a diverging or converging light incident thereon into a first optical path of light flux reflected from the semitransparent surface and a second light path of light flux transmitted through both the semitransparent and transparent surfaces. Furthermore, in order that the position of an image focused by the light flux reflected from the transparent surface coincides with the position of an image focused by the light flux reflected from the semitransparent surface, the transparent surface is made non-parallel with the semitransparent surface of the semitransparent mirror. The thickness of the mirror decreases or increases toward image planes depending upon whether converging light flux or diverging light flux is incident on the mirror.

Abstract: An Orthogonal Parabolic Reflector is generated by rotating a parabolic curve 90.degree. to the axis of symmetry passing through the focal point of the parabola. The Orthogonal Parabolic Reflector can concentrate a section of the linear source or sink on the axis of rotation to the focal point, resulting in integrating the intensity as a point source or sink at the focal point with almost no physical dimension effects.

Abstract: A construction for a deformable mirror is disclosed in which each of the electrodistortive actuators used to selectively impart deformations to the mirror's reflecting facesheet are mechanically fastened to the facesheet and may be disengaged from the facesheet by operating a fusible link. In one preferred embodiment the fusible link consists of a layer of thermoplastic material covering an electrical resistive element located between the top of the actuator and the point on the facesheet at which the actuator is mechanically bonded to the facesheet. Heat generated by the resistive element may be used to melt the thermoplastic material fastening the actuator to the facesheet. The second preferred embodiment provides a fusible link consisting of an electrocapacitive layer sandwiched between two electrically-conducting layers.

Abstract: An outside back mirror device for use in an automobile which comprises an outside back mirror casing, a solenoid actuated by a drive circuit for turning on and off the power source for a certain time period, a hydraulic member for receiving the force applied by the solenoid so as to make a mirror move, a shock absorber for delaying the return of the mirror to its original position, and an elastic member including a fixing bolt and a spring for causing the mirror to return to its original position.

Abstract: In a mirror supporting apparatus, a lever pivots the center of gravity of the mirror, whereby performing exactly the same motion with respect to a mirror provided with a universal joint at the center of gravity of the mirror. Therefore, the same effect as that of conventional mechanism is obtained without provision of a hole in the mirror. Furthermore, a counter weight is secured to the mirror so as to position a substantial center of gravity of the mirror outside of the mirror, whereby obtaining a similar effect.

Abstract: a display apparatus comprises, a display unit, a first diffraction grating for diffracting the light from the display unit, and a second diffraction grating for diffracting the diffracted light from the first diffraction grating, the apparatus being constructed in such a manner that the optical path length between the display unit and the first diffraction grating is shorter than that between the first and second diffraction gratings.

Abstract: A video display system includes a source of optical energy, a beam splitter, a baffle, an MxN array of mirrors and a screen. The source develops the first light beam along a first propagation path. The beam splitter is disposed in this first propagation path. The beam splitter is positioned to split the optical energy of the first light beam to develop a second light beam along a second propagation path. The baffle has a first face, a second face and a row of parallel slits. The slits are open between the first face and the second face and may extend either vertically or horizontally across each face of the baffle. Accordingly, there are either M rows or N columns of slits. The baffle is disposed in the second propagation path so that the second light beam illuminates the first face and passes through the slits to exit from the second face as a plurality of planar light beams along the second propagation path. The mirror array is disposed in a facing relationship to the second face of the baffle.

Abstract: A diver's information system is disclosed that displays information in the diver's line of sight without substantially obstructing his vision. The diver's system includes a microprocessor, and has an input capability that allows a diver to select one or more dive parameters before a dive. A plurality of sensors, connected to the microprocessor, are provided to monitor parameters such as air tank pressure, depth and water temperature. The system monitors these parameters during the ensuing dive, and provides warnings upon any of a variety of conditions occurring, such as if one or more of the parameters are violated. Throughout the dive, the system periodically stores dive data and any warnings (if present) in a static RAM. Subsequent to the dive, the stored information can be downloaded into an external computer through a provided external port.

Abstract: An optical notching filter is disclosed in which an optical spatial filter therein is formed by a spatial light modulator which is written into by light. The optical notching filter system of the present invention provides a linear phase and amplitude response with applications for high speed adaptive filtering to filter out noise and signals of no interest. In one particular disclosed embodiment, the write with light optical notching filter system of the present invention is designed to adaptively excise interference from Radio Frequency (RF) signals, such as are utilized in communications or radar systems. The technical approach of the present invention provides a more compact system design than similar electronically addressed optical notching filtering systems, and also significantly reduces the complexity and attendant power requirements of the system. Different embodiments of a write with light optical notching filter system can operate with either nonochromatic or polychromatic light sources.

Abstract: A deep ultraviolet (UV) lens for use in a photolithography system provides enhanced resolution by using shorter wavelengths of light exposure (in the ultraviolet wavelength). The improved lens includes a meniscus and a first mirror for imaging light in the deep ultraviolet range to the meniscus. The meniscus images the light to a plano-convex lens which is located proximately to the concave surface of the meniscus. The lens further includes a pair of optical elements (prisms) proximately located to the plano surface of the plano-convex lens. The present invention provides for operation in the deep ultraviolet range with a aperture in one embodiment of 0.350.

Abstract: A wavelength division multiplexer/demultiplexer having optical path lengths between a fiber array and a Fourier transform lens, and between a dispersion grating and the lens equal to the focal length of the lens. The equal optical path lengths reduce losses due to angular acceptance mismatch in the multiplexer. Close orientation of the fiber array about the optical axis and the use of a holographic dispersion grating reduces other losses in the system. Multi-exposure holographic dispersion gratings enable the multiplexer/demultiplexer for extremely broad-band simultaneous transmission and reflection operation. Individual Bragg plane sets recorded in the grating are dedicated to and operate efficiently on discrete wavelength ranges. A volume Bragg vertically non-uniform holographic grating enables operation of the multiplexer or other devices that act on light waves according to wavelength over nearly the full usable 0.8-1.3 .mu.m wavelength range.

Abstract: The disclosure relates to a pointer for a three dimensional display wherein a scanned light beam is displayed upon a rotating display member rotating about a fixed axis for receiving and displaying the scanned light beam on a first surface thereof, fixed points in the display impinging upon the display member to display a harmonic motion along an axis passing through the scanned light beam in response to rotation of the display means. A beam of focussed light, preferably from a laser is modulated to synchronize with rotation of the display member to provide a visible point in the display at a predetermined location therein. A second embodiment provides an encoder, light conducting rod bundle and sensor to determine the three dimensional location of the point denoted by the pointer.

Abstract: A method and apparatus for producing temporally coherent, full color holograms is disclosed whereby a linear array of stereographically positioned cameras are simultaneously triggered to obtain a temporally coherent sequence of full color exposures. The exposures are then sequentially exposed upon an H1 plate using multiple wavelength, "white" laser light to obtain a virtual full color hologram image in a single step operation.

Abstract: The present invention is directed to the use of magnesium films in reflectors and low emissivity coatings.

Abstract: A support for an external rearview mirror for motor vehicles that comprises a support rod having an intermediate vetical portion for supporting the mirror and upper and lower transverse portions extending substantially horizontally from opposite ends of the vertical portion. Upper and lower base arrangements connected with respective free ends of the upper and lower transverse portions for attaching the support to a vehicle body. The upper transverse portion is pivotally attached to the upper base arrangement and the lower transverse portion of the support rod is fixedly attached to the lower base arrangement. The lower base arrangement includes a stabilizing mechanism for the mirror support.

Abstract: A device for adjusting a side view mirror has an auxiliary mirror arranged on the side view mirror and having a reflective surface inclined relative to the reflective surface of the side view mirror so that when the driver sees an image of a target on the automobile body the line of sight of a driver looking in the side view mirror is directed toward a required blind spot area near the automobile.

Abstract: The invention relates to an infra-red objective zoom system providing a high performance over a range of magnifications of from about 0.5 to about 8 times with a correction for temperature changes in a wide range it comprises only five optical groups of a total of seven lense groups (termed herein A to D). These are arranged in the sequence of A, a front singlet lens of positive power with a diameter larger than that of the other lenses abberation, B a negative optical element consisting of lenses B' and B"; B' being a negative lens having a dispersive factor larger than that of the other lenses, resulting in achromatization of the system; B" is a negative lens. Both negative lenses B' and B" have under-corrected spherical abberations, C being a positive lens, D being a positive auxiliary lens, being at a fixed distance respective lens A; E being a movable collimator of positive optical power, lenses B, C and E being movable respective fixed lenses A and D, said lenses transmitting in the 3.mu. to 12.mu.

Abstract: A portable mirrored device for eyedrop users and contact lens wearers including a headband sized for supportively positioning around the user's head, a forwardly extending arm pivotally connected on either side of the headband, and a transverse mirror housing pivotally mounted between the other end of each extension arm. The protective mirror housing includes a mirrored rearwardly facing surface for viewing. By this arrangement, the user may conveniently position the mirrored surface so as to view his or her own eyes as contact lenses are positioned or eye medication is dispensed into the eyes.