Abstract: A device for adjusting a side view mirror of an automobile 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 in the auxiliary mirror 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: A three-step process is combined with an edge-lit system to provide a self-contained, maximally-compact holographic display. In one embodiment, a hologram is affixed to an upstanding transparent support plate mounted through the top of a housing in which the hologram is edge-illuminated with white light from a source in the housing immediately beneath the plate to generate brilliant, sharp and deep multi-color images which straddle the hologram plane. In another embodiment, the transparent support plate is mounted in a frame which carries the edge-illumination source. All displays may either be free-standing or wall-mounted, as desired.
Abstract: The present invention relates to a novel architecture and associated apparatus for the development of highly multiplexed photonic interconnection networks and holographic optical elements with maximum optical throughput efficiency and minimum interchannel crosstalk, based on parallel incoherent/coherent holographic recording and readout principles. This scheme further provides for arbitrarily weighted and independent interconnections, which are of potential importance in the development of neuro-optical computers, as well as photonic interconnection networks and multiplexed holographic optical elements. In addition, the extremely difficult problem of copying the contents of a three-dimensional holographic storage device in one step is soluble by utilization of the architectural principles and specified apparatus that are key features of this invention.
April 6, 1990
Date of Patent:
June 9, 1992
University of Southern California
B. Keith Jenkins, Armand R. Tanguay, Jr.
Abstract: A focusing screen of the type composed of a multitude of micro-lens-like curved surfaces arranged on a given plane is substantially regular in terms of their two-dimensional arrangement on the above-mentioned plane but exhibits some variation in terms of the height of the microscopic surface roughness formed by the micro-lens-like curved surfaces. The variation range is determined in correspondence with the pitch of the above-mentioned two-dimensional arrangement. Also disclosed is a method of manufacturing a focusing screen exhibiting an appropriate degree of randomness in terms of its surface configuration.
Abstract: A perimetry system uses pupillary light response to a small bright light spot or other suitable stimulus which moves at a constant speed in generally a circular path centered on a fixation mark upon which the patient's field of view is fixed. The pattern traced by the spot may be a spiral, starting at the periphery and shrinking toward the fixation mark. A measuring system continuously monitors pupil size and if the retinal image of the moving light spot moves across a region of reduced sensitivity, this event is signaled by a change in pupil size.
Abstract: A mirror apparatus includes a holder formed into a cup-shaped configuration and having an opening enclosed by a holding portion which is in the form of an inward projection. A mirror is disposed within the holder and has an outer surface exposed through the opening and a rear surface. A supporting member engages with the rear surface of the mirror in a surface-to-surface manner and permits transmission of ultrasonic vibrations. An elastic device urges the mirror on the holding portion via the supporting member independently from deformation of holder.
Abstract: A diffraction grating can be tuned by varying the spacing of the rows of the diffraction grating. The diffraction grating is comprised of rows of an electrically conductive material disposed on a deformable material. The deformable material is transparent to a light of numerous wavelengths. A means for applying a voltage on the rows of the electrically conductive material is provided to change the spacing of the rows, thus changing which wavelength of light is diffracted.
Abstract: An ultra-black film is disclosed, which essentially consists of a base, a Ni-P alloy layer formed on said base and a phosphate layer formed on said Ni-P layer, the spectral reflectance of said ultra-black film being 0.04 to 0.4%. The invention provides an LED module having an inner surface provided with an ultra-black film.
Abstract: A relatively simple device for turning a mirror on a truck or other automotive vehicle includes a pivot for rotatably supporting one end of the mirror, and a casing on the other end of the mirror. The casing contains a reversible motor and gearbox combination for rotating a threaded shaft, which carries a threaded block. Rotation of the shaft causes movement of the block to rotate an arm connected to the other end of the mirror. A pair of microswitches located in the path of travel of the block limit movement of the block and consequently rotation of the mirror beyond predetermined limits.
Abstract: An electronic autostereoscopic display that presents 3D images through the use of horizontal parallax is disclosed. The device disclosed presents a 3D image, viewable over 360 degrees or less, without the need of special viewing glasses. The image is created electronically and in real-time, thus it can immediately display data gathered remotely, as in live 3D television, and similar applications. The autostereoscope consists of a cylindrical holographic optical element (HOE) which is spun about its axis of symmetry by a motor, light sources such as lasers emit light beams incident on the HOE, and electronic circuitry modulates the lasers according to data received and the angular displacement of the HOE. The HOE consists of 2 basic types of holograms which perform 2 different functions. The first type of hologram performs two dimensional raster scans onto the second type of hologram.
Abstract: An object of the present invention is to provide an easily removable and storable surveillance driving mirror for the aforesaid purpose, and wherein the vibration due to vehicles motion is substantially eliminated. My surveillance safety mirror design includes a heavy duty vinyl tape backed convex mirror (horizontal plain only), rubber pads on the tip of the spring-loaded clamp, threaded collar, off-set (off center) ball/socket housing, pivotal ball arm and a spring-loaded edge bordered clamp. My design is more versatile in function, by the very nature of the spring-loaded clamp, pivotal ball arm, threaded collar and off-center ball socket housing. It can be attached to any suitable point in the vehicle, the most ideal/suitable point being on the vehicle's existing rear-view mirror's day/night selector switch. This provides for conventional monitoring, without distracting or obstructing the view of the user.
Abstract: A multilayer antireflection coating designed for deposition in in-line coating machines by DC reactive sputtering. About half of the total thickness of the coating may be formed from zinc oxide which has a high sputtering rate.
Abstract: A pulsed laser provided a pulsed incident beam which impinges a recording assembly which includes a glass substrate and a recording film adhered thereto. The pulse can be singular or multiple. In either event, the duration of each pulse of light is controlled in such a fashion so that the pulse is long enough to enable it to reflect off of a reflecting element to thereby produce a primary reflected beam. In the recording film, the primary reflected beam can interfere with the incident beam to produce the interference pattern in the film. However, the pulse is not of such a duration to allow a noise reflected beam, such as one from a glass-air interface, to pass through the recording film and interfere with the incident beam or primary reflected beam while those beams are still present. Thereby, noise holograms which might otherwise be recorded in the film are precluded while allowing the primary hologram to be recorded.
Abstract: A holographic member for a helmet visor comprising a first holographic layer having planes of diffraction oriented in a first direction in a given local area is disclosed. A second holographic layer disposed over said first holographic layer has planes of diffraction oriented in said local area in the opposite direction. The first holographic layer is transferred from a slanted planar holographic mirror. The second holographic layer comprises the holographic analog of an oppositely slanted transferred planar mirror. The slant and the opposite slant have substantially the same magnitude of slant but opposite orientation, providing for diffractive ghost compensation. A third holographic layer, unslanted, is transferred from an unslanted planar holographic mirror. The three holographic layers provide practical total eye coverage with minimum diffractive unwanted ghosts.
Abstract: A mirror for attachment to an article including a frame having a reflective surface on one side and a plurality of straps including fasteners for attachment to the article with the reflective surface facing away from the article.
Abstract: A control arrangement for a galvanometer driven mirror whereby the angle of incidence of a beam on a holographic recording material is controlled includes a laser source and associated detector. The detector responds to a reflected position sensing beam incident thereon to generate electric currents. A ratio network forms the ratio of the sum and difference of the currents to generate an actual mirror position signal that is independent of the power output of the source of the sensing beam. An integrator is responsive to the error between the signal representative of the actual mirror position and a reference signal representative of a predetermined position of the mirror for forming a galvanometer position signal.
Abstract: A separable interchangeable eyeglass frame includes an upper frame member having a brow member including first and second upper eye wire members interconnected by a bridge member. The upper frame member has first and second elongated temple members pivotally joined to the outboard ends of the first and second upper eye wire members. The eyeglass frame includes a lower frame assembly having first and second lower eye wire members. The lower frame assembly may include first and second filament members for attaching first and second lenses to respective first and second lower eye wire members, thereby forming a lower lens assembly. The lower frame assembly may be comprised of two separate pieces, or may be a unitary member with the first and second lower eye wire members interconnected by a lower bridge member. A variety of securing fasteners may be used to releasably secure together the upper frame member and the lower frame assembly.
Abstract: A composite optical interference filter is used in a film scanning system having a high speed CCD imager. Multiple, alternating, variable thickness layers of higher and lower index thin film oxides deposited on an optically transmissive substrate constitute the filter and enable the filter to provide color balance, notch rejection, and IR rejection all in the same device. Three such filters in a lamphouse of the film scanning system can be selected to match the system spectral response of the CCD imager and the film thereby providing equal density and color balance of the images on the film.
September 11, 1990
Date of Patent:
March 24, 1992
Eastman Kodak Company
Anna L. Hrycin, James R. Milch, Walter S. Piskorowski, Jr.
Abstract: A adaptive flow-control regulator is disclosed for use in controlling the circulation of cooling fluid through in a cooled laser mirror. The adaptive flow-control regulator utilizes a temperature-sensitive spring to control the movement of a plunger with respect to an orifice through which cooling fluid flows. Elongation of the spring is controlled by the temperature of the cooling fluid circulating around the spring. As the temperature of the coolant fluid increases from heating of the laser mirror, the spring contracts moving the plunger away from the orifice and allowing a greater volume of coolant to circulate through the mirror, thereby absorbing a greater amount of heat from the mirror structure. As the mirror is cooled by the circulating cooling fluid, the spring moves the plunger toward the orifice, thereby reducing the volume of cooling fluid circulating through the mirror's structure.