Matches 101 - 150 out of 253 < 1 2 3 4 5 6 >
Match Document Document Title
5790299 Optical isolator employing a cadmium-zinc-tellurium composition  
A Faraday rotator for rotating a plane of polarization of polarized light, said Faraday rotator having an optical element comprising a rod which is comprised of an optically transmitting...
5771120 Optical apparatus with combined polarization functions  
Apparatus performs polarization dependent functions although the apparatus is polarization independent with respect to the outside world. The apparatus produces parallel beams with like...
5742430 Displaceable doubled-over sheet configuration, useful particularly for a variable light transmission device  
A device is provided including a flexible sheet having extents encompassing at least a circular area, said flexible sheet doubled-over upon itself through the center of the circular area such that...
5657161 Dual polarized filters to eliminate canopy reflections  
A system is provided for eliminating light reflections within the cockpit of a vehicle having a canopy with a reflective interior surface. A first polarizing filter overlies a lighted display,...
5629492 Technique for eliminating undesirable reflections from optical systems  
Undesirable reflections from an element in an optical system are eliminated y passing incoming light through a polarizer and a 45° optical rotator before it strikes the reflective element. The...
5612813 Optical isolator, circulator, switch or the like, including a faraday rotator  
Optical isolator, circulator, switch or the like, including a Faraday rotator to which a magnetic field is applied which is oriented along the direction of propagation of light and which is...
5598298 Polarization perception device  
A polarization perception device comprises a base and a polarizing filter having opposite broad sides and a centerline perpendicular thereto. The filter is mounted on the base for relative rotation...
5581640 Dual stage optical device with low polarization mode dispersion and wavelength insensitivity  
The present invention provides for a two-stage optical isolator with reduced polarization mode dispersion. Each stage has two birefringent polarizers separated by a Faraday rotator. The polarizers...
5548427 Switchable holographic apparatus  
A switchable holographic device which includes a first polarizer having a spatially varying direction of polarization. The device also includes a liquid crystal device arranged to act as a...
5543917 Object detector  
A method for detecting objects while eliminating unwanted background utilizes polarizing contrasts. A lens systems focuses light from the field of view through a beam splitter. One beam passes to a...
5514106 Bag including an identification system indicative of treatment of the bag  
A fluid-carrying bag (10) or container is provided as well as a method for forming such a bag. The bag (10) has identifiers (28a, 28b) indicating a status of the contents of the bag (10). To this...
5488496 Partitionable display system  
An apparatus to display images with partitionable regions allowing visible, invisible, and narrow field of view of displayed information includes a polarizing means to form a plane polarized light...
5452089 Object locator  
A search light employs variable polarization angles to enhance target identification. The search light shines a beam of light which may be directed across terrain. The beam of light is alternated...
5452122 Element for optical isolator and optical isolator employing the same, together with semiconductor laser module employing the optical isolator element  
An element for an optical isolator which is formed by alternately bonding together at least one flat plate-shaped Faraday rotator and two or more flat plate-shaped polarizers, the optical isolator...
5345308 Object discriminator  
A device will detect man-made objects by using a polarizer mounted to a video camera. The polarizer rotates about an axis in front of a lens array of the video camera. The rotation of the polarizer...
5284364 Increased-security identification card system  
The invention is a document security system characterized by a data substrate having photographic or printed information on a base print, and also having a personalized polarization-altering...
5260827 Glare shield  
A glare shield attachable to multiple optical devices or for hand held use is disclosed including two ring shaped housing members each carrying a polarizing element with one ring member rotatably...
H001154 Covert lighting adapter  
A Blue-Green spectral Filter and two polaroid filters are assembled within rotating barrel assembly to both limit light source emissions to a selected light spectrum and control light intensity in...
5189552 Incidence angle light attenuator for light transmissive panels  
A method and apparatus for controlling light attenuation through a light transmissive panel uses polarized film sheets positioned on opposing surfaces of the panel. The film sheet comprises...
5164856 Transmittance-adjustable window  
A transmittance-adjustable window (20) that includes first and second polarizer sheets (34B)(46B) and an actuator (44) for relative movement between them. The first sheet (34B) has a translation...
5158348 Flood lighting system  
A flood lighting system comprising a flood light having a built-in lamp for lighting a building, a polarizer adapted to linearly polarize radiation from the lamp, and an analyzer disposed in such a...
5101296 Light-polarizing mosaic pair  
Information in binary form is stored in a planar array or mosaic of light-polarizing cells, wherein each cell may have two distinct orientations of the axis of polarization. For example, binary "1"...
5044743 Corrective lens system  
A corrective lens system with selectable optical characteristics includes a lens element for placement in the optical path of a human eye ahead of the retina of the eye and a polarizer element for...
5033828 Optical output controlling method and apparatus  
An optical output controlling method according to the present invention is employed in an optical system in which a polarized light is illuminated on a magneto-optical material, and in which the...
5033829 Overlapping polarizer panels capable of generating light and dark and colored patterns  
Sheets of certain transparent plastic materials placed between polarizer sheets have the ability to change substantially the light intensity emerging out of the polarizers without inducing colors...
5009477 Optical interconnect arrangement  
An arrangement for butt coupling of waveguide electrooptic plates to form a crossbar switch. The arrangement includes a stack of M splitter plates, each of which routes an injected optical signal...
4978189 Hybrid optical isolator, circulator or switch, and systems utilizing same  
An optical circulator/isolator is implemented in a semiconductor package formed by a semiconductor substrate, which supports integral thin film waveguide polarization splitters and combiners, and a...
4979026 Polarized light 360 degree viewing system  
A viewing system is provided for presenting a real image in space that is rotated extremely rapidly so that an entire audience, regardless of an individual's position about the viewing system, can...
4978986 Camera accessories for contrast control  
Camera accessories, mountable on lenses or flash units, for altering contrast between dark and light areas of photographs. A camera accessory includes framing plates for holding a polarized filter...
4961634 Infrared achromatic retarder  
An infrared achromatic waveplate structure having a cadmium sulfide (CdS) plate and a cadmium selenide (CdSe) plate aligned with each other so that the fast axis of the plates are perpendicular to...
4947291 Lighting device  
A synthesizer for covert operations under blackout conditions of a light that has shaped energy distributions in the visible wavelengths for visual discrimination of multiple colors upon objects in...
4926327 Computerized gaming system  
A computerized gaming apparatus is disclosed in which a card game, such as poker, is electronically simulated on a plurality of individual player consoles. Each of the player consoles is...
4902112 Variable density light transmitting device  
A variable density light transmitting device comprising a first light transmitting layer having a plurality of light polarizing areas with differently oriented transmission axes; a second light...
4896901 Flexible sheet or web materials  
A document security article is disclosed in which a light polarizing element is contained within a flexible sheet element. A region of the light polarizing element is exposed at a window at both...
4889121 Pain-relieving composite having a relatively rapid action  
An orientable composite having application to the human body for the relief of pain is provided. The composite consist of at least one pair of polarizing plates having polarization axes...
4856879 Aiming device  
An aiming device (diopter) has an easily removable eyepiece with adjustable diaphragm mounted on one end of a housing portion which housing portion has a cavity eccentrically formed therein. A...
4808978 Display system comprising a transparent emissive screen  
A device for weakening the incident light passing through a transparent emissive display system so as not to drown the emitted light is disclosed which utilizes two polarizing filters one at least...
4729622 Fiber optic polarizer with error signal feedback  
This invention provides apparatus and methods for converting a lightwave of an arbitrary polarization propagating in a single mode optical fiber into a wave having a single linear polarization...
4714321 Optical viewing apparatus  
The apparatus permits an external target to be viewed along a sight-line by a sensing device and for the projection of a beam of laser radiation (12) towards the target. The apparatus includes a...
4697890 Light emitting device  
A device, such as a flashlight, spotlight, or reading light, for emitting an incident beam of light wherein the intensity and color of an incident beam of light emitted from the device can be...
4653843 Image producing device  
An amusement device for producing a variety of unusual changing images and colors comprising a tube having an interior reflecting surface extending substantially the entire length thereof. An...
4579426 Variable transparency window  
A variable transparency window assembly comprising a plurality of polarizing window elements, the first and second of said elements being fixedly secured to supporting structure with their...
4523849 Front lighted optical tooling method and apparatus  
An optical tooling method and apparatus uses a front lighted shadowgraphic technique to enhance visual contrast of reflected light. The apparatus includes an optical assembly including a fiducial...
4501473 Front lighted shadowgraphic method and apparatus  
High contrast silhouette images of a substantially opaque object are obtained using front illumination techniques. The object is frontally illuminated by light of a first polarization. A frontal...
4491326 Puzzle having polarized stackable components  
A puzzle characterized by a number of stackable components each provided with an activated area consisting of a plurality of polarized zones. Each zone is polarized along one of two mutually...
4379634 Method and device for detecting birefringent substances in liquids  
A method and a device for detecting the presence or absence of substances having birefringent properties in liquids, particularly the detection of crystals of uric acid in samples taken by puncture...
4364375 Thermal solar energy collector  
This invention contemplates a solar to thermal energy converter comprising spaced apart light polarizing materials defining a conduit therebetween for the passage of a fluid to be heated, the...
4299451 Minimum resolvable contrast measurement device  
An apparatus for creating images of nonperiodic patterns, which patterns are variable in contrast with respect to a uniform and constant level of background luminance. Two beams of uniform...
4285577 Window system comprising light polarizers  
A window construction adapted to permit or prevent the transmission of light including first and second fixed polarizer panels, the first of which comprises two adjacent polarizers which are in the...
4263810 Angular deflection sensing apparatus for load, force, and other types of measurements  
A method and apparatus of measurement of angular deformation of a body, and in particular, a method and apparatus of load or force sensing are disclosed. Chief applications are found in electronic...
Matches 101 - 150 out of 253 < 1 2 3 4 5 6 >