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7570426 |
Apparatus and system for wide angle narrow-band optical detection in daylight
Techniques for filtering light include, along a central optical axis, an entrance window; a first polarizer, a narrowband polarization-changing material, a second polarizer, and an exit window. The...
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7548370 |
Layered structure for a tile wave plate assembly
The present invention relates to an apparatus for polarizing an incident light beam. In embodiments, a tile wave plate assembly is provided. The tile wave plate includes a layered structure having...
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7545570 |
System for selectively blocking electromagnetic energy
A system for selectively blocking electromagnetic energy. The system includes a first mechanism for employing a perforated component to pass a beam characterized by a first property and reject a...
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7535640 |
Imaging system for emulation of a high aperture scanning system
An optical imaging system for inspection microscopes with which lithography masks can be checked for defects particularly through emulation of high-aperture scanner systems is provided. The imaging...
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7511886 |
Optical beam transformation system and illumination system comprising an optical beam transformation system
An optical beam transformation system has a sequence of optical elements arranged along an optical axis of the optical beam transformation system and designed for transforming an entrance light...
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7511783 |
Optical laminated bodies, lighting equipment and area luminescence equipment
Lighting devices are disclosed that include optical laminated bodies. An exemplary optical laminated body includes a polarizing layer, a first transparent film disposed closely to a front surface...
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7495831 |
Optical device, display device, and three-dimension image display device for changing a polarization state of a light beam in time
An optical element, an optical device, and a display device are disclosed that are able to change a polarization state in time order and to produce polarized light with little wavelength dependence...
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7443585 |
Polarizer, polarization light source and image display unit using them
A polarization component, capable of efficiently reflecting an obliquely transmitted light beam toward a light source without degrading the transmission-polarization property of a perpendicular...
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7433558 |
Methods for optical isolation in high power fiber-optic systems
Methods for optical isolation in high peak power fiber-optic systems prevent damage to a facet within a fiber-optic isolator caused by back-reflected light from, for example, an optical amplifier....
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7420732 |
Disappearing and appearing image of an object
A process for making a real image of an object appear or disappear to an observer is disclosed. A real image projection system displays a real image of an object. A first polarizer and a second...
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7417796 |
Wavelength discrimination filter for infrared wavelengths
An optical comb filter has polarizers placed before and after two or more birefringent elements, each having a fixed retarder and an aligned tunable liquid crystal. The birefringent elements are...
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7414786 |
System and method converting the polarization state of an optical beam into an inhomogeneously polarized state
A system for converting the polarization state of an optical beam which propagates along a path from an initial polarization state into an inhomogeneous polarization state includes a first...
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7408710 |
Polarizer device adapted to polarized light
The invention provides a polarizer device. The polarizer device according to the invention is adapted to a polarized light having an electric field direction. In particular, the polarizer device...
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7391568 |
Luminous intensity distribution control device and display having the same
A liquid crystal display apparatus including: a liquid crystal display element having a liquid crystal layer; a backlight apparatus arranged at one side of the couple of substrates of the liquid...
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7375889 |
Apparatus and method for controlling polarization in an optical communications medium
A method for resetting a polarization controller includes determining that the phase magnitude is associated with a first range of phase angles and generating a first control signal having a first...
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7362505 |
Mirror with built-in display
A mirror display device which may be simultaneously used for display purposes, based on a display, wherein the display device during use provides light of a first (circular) polarization, with a...
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7324280 |
Apparatus for providing a pattern of polarization
A polarization pattern assembly produces a polarization pattern. In an embodiment, a polarization pattern assembly includes a frame that supports a polarization pane in a central region of the...
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7308171 |
Method and apparatus for optical isolation in high power fiber-optic systems
Methods and apparatus for optical isolation in high peak power fiber-optic systems prevent damage to a facet within a fiber-optic isolator caused by back-reflected light from, for example, an...
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7298940 |
Illumination system and display system employing same
A compact, light weight, efficient and cost-effective illumination system for optical displays is disclosed. The illumination system is capable of producing a self-luminous light beam of selected...
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7286289 |
Surveillance window
A surveillance window including at least one set of linear polarizer and quarter-waveplate and a reflecting surface. The surveillance window appears dull and opaque to a subject, while allowing a...
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7256937 |
Structured polarizer and method for making the same
A structured polarizer (linear polarizing filter) with side-by-side in a plane (lateral) regions having different polarization directions, complete extinction and complete transparency, is...
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7245431 |
Reflective polarizer assembly
An assembly that includes a first reflective polarizer substantially reflecting light having a first polarization state and substantially transmitting light having a second polarization state, a...
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7236301 |
Polarized light valve
A projection system for making an object appear and disappear to an observer on cue. The system remotely activates a reflective axis and a transmissive axis within a polarized window for making an...
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7230760 |
Polarizers and isolators and methods of manufacture
A passively aligned optical isolator includes laminated layers of material including two polarizing glass layers sandwiching a Faraday rotator layer. Each polarizing glass layer comprises a glass...
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7227686 |
Tunable PMD emulators and compensators
Tunable PMD emulators and compensators for producing different PMD profiles with an adjustable average DGD value.
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7196847 |
Device and method for an optical tunable polarization interface filter
The tuner has constituent component for constructing a tunable or switchable spectral filter, including single and multiple stage filters and fitters without intermediate polarizer, over a...
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7195356 |
Split-path color switching system and method
The present application describes a retarder stack color switch using a single polarization analyzer for reflective-mode projection displays. The single polarization analyzer permits additive mode...
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7184213 |
Rod integrators for light recycling
An integrating rod ( 200 ) for use with a multiple segment dynamic filter, such as a spiral dichroic color wheel having three or more narrow filters adjacent to the exit face ( 206 ) to enable the...
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7173763 |
Optical interleaver and filter cell design with enhanced clear aperture
An optical interleaver for use in a range of telecommunications applications including optical multiplexers/demultiplexers and optical routers. The optical device includes an optical processing...
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7170680 |
Privacy screen for a display
A privacy screen for a vertically polarized display (e.g., a LCD) that comprises a rotating film, a polarizing film and a birefringent film is described. The privacy screen transmits substantial...
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7169447 |
Achromatic quarter wave film
An achromatic quarter wave film (AQWF) comprising at least one quarter wave film (QWF) and at least one half wave film (HWF), each of said QWF and HWF comprising polymerized or vitrified...
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7154670 |
Methods and apparatus for polarization control
Methods and apparatus of performing polarization control for optical transmissions. The methods and apparatus enable polarization control devices to achieve a desired output state of polarization...
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7154668 |
Wavelength dependent optical attenuator and variable attenuation profile controller
The attenuation profile of an optical system, which defines the power variation as a function of wavelength is adjusted to alter the slope of its contour. The device is useful in a wavelength...
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7154573 |
Electro-optical device and electronic apparatus including the same
To provide an electro-optical device displaying high-contrast images in all directions due to the orthogonality of the polarization axes of the polarizers by improving the structure of the...
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7130123 |
Polarization conversion element and optical system containing such polarization conversion element
A polarization conversion element with four phase plates laminated on a substrate plate, in the order of first, second, third and fourth phase plates from a light incident side. The first and...
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7106509 |
Filter for enhancing vision and/or protecting the eyes and method of making a filter
The selective filtering of light by polarization interference may be used to enhance vision and/or protect eyes from harmful light rays. For example, such filtering may be used in sunglasses, color...
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7095559 |
Variable optical delay circuit
In a variable optical delay circuit to be used for compensation for polarization mode dispersion of an optical signal and for other purposes, there are provided a first birefringent member, a...
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7085052 |
Over-parameterized polarization controller
A controller, particularly for setting a desired or randomized polarization state of an output light beam derived from an input, has more than the minimum number of controllable optical elements...
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7068864 |
Waveguide-embedded optical circuit and optical functional element used therein
The present invention is to provide an arrayed waveguide-embedded optical circuit with reduced loss at a groove and an optical functional element using for the arrayed waveguide-embedded optical...
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7061680 |
Adjusting contrast in an optical system
An improved object projection system provides an observer with a surrounding background that has adjustable contrast levels relative to an object. A transmissive polarizer and a reflective...
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7057814 |
Illumination system for reflective displays
An illumination system for a reflective display is particularly useful for microdisplays that use reflective displays. The light source and the reflective image display unit are mounted in a...
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7038821 |
Scanning apparatus
A scanning apparatus comprises two rotatable bodies ( 1, 10 or 40 ) arranged to rotate in opposite directions. The first body being a polarizer ( 10 ) and the second being a mirror ( 1 ) or a...
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7027235 |
Optical system for providing a useful light beam influenced by polarization
An optical system for providing a useful light beam, having one or more optical components ( 3, 4, 5 ) which attenuate a useful light fraction with a first linear polarization state less strongly...
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7004599 |
Illuminated mirror employing cross and parallel polarization
The present invention relates to an illuminated personal hygiene mirror for viewing facial skin or other areas of the body. In each of the embodiments of the present invention, a hand-held frame...
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6992822 |
Projection display system using a diffuse reflecting polarizer
In one embodiment, a projection screen includes a diffuse reflecting polarizer that diffusively reflects light polarized in a first direction and transmits light polarized in a second direction....
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6987256 |
Polarized semi-active laser last pulse logic seeker using a staring focal plane array
An improvement in a semi-active laser last pulse logic missile seeker is disclosed and claimed. In one embodiment, the improvement includes a first polarizer disposed in the detection field of view...
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6986580 |
Latent effects projection system
Latent effects projection systems that allow a latent effects projector to be used in connection with various materials, such as wall pieces, floor tiles, signage, hangings, and the like; use...
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6934080 |
High efficiency viewing screen
A low-scatter polarization-preserving multilayer viewing screen. A substrate D, preferably a volume diffuser, for increasing the divergence of information-coded-light while preserving its...
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6927909 |
Integrated magneto-optical modulator with optical isolator, method of manufacturing the same and optical communication system using the same
The integrated magneto-optical modulator with optical isolator of the present invention comprises an optical isolator unit, a magneto-optical modulator unit, an impedance adjuster. The optical...
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6909544 |
Method for eliminating strong ambient light in aircraft cockpits
Light is polarized in perpendicular directions between a source of light and a users viewing of information on a display device. A first sheet of polarized material is placed at the source of the...
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