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6775065 |
Diffraction element and optical pickup device
In a diffraction element, a diffraction grating is formed with a grating pitch having different diffraction angles in accordance with a wavelength of a laser light beam incident thereon. The...
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6775066 |
Diffractive optical element
The present invention provides a different optical element having superior optical characteristics. A polycrystalline substrate having crystal grains whose sizes are not more than 1 μm or an...
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6768589 |
Method and apparatus providing reduced polarization-dependent loss
A diffraction grating providing reduced polarization dependent loss. The elements of pixels of the diffraction grating are fixed or actuated such that some grating elements are actuated to...
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6765724 |
Diffraction grating-based wavelength selection unit having improved polarization dependent performance
An optical wavelength selection device containing an optical beam source, a device for collimating the optical beam to produce a collimated optical beam, a diffraction grating assembly for...
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6762880 |
Grating structures and methods of making the grating structures
New grating structures include a bonded transmission grating structure. The grating structure is encapsulated by two pieces that are bonded together. In addition, a new method of making grating...
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6762881 |
Optical arrangement, Littrow grating for use in an optical arrangement and also use of a Littrow grating
An optical arrangement has a light source which emits coherent light of a specific wavelength. Further provided is an optical Littrow grating, arranged at a specific Littrow angle θ L . It has a...
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6757105 |
Optical device having a wide field-of-view for multicolor images
A diffractive optical element for guiding a light having a color spectrum characterized by a plurality of wavelengths longer than a shortest wavelength, λ B , and shorter than a longest...
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6750998 |
Electro-mechanical grating device having a continuously controllable diffraction efficiency
An electro-mechanical grating device including: a base having a surface; a bottom conductive layer provided above said base; a spacer layer is provided and a longitudinal channel is formed in said...
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6747798 |
Polarization control of UV writing
A system and method are provided for writing refractive index structures, such as gratings, in an optical waveguide. There is no requirement for structures having interferometric stability of the...
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6734436 |
Optical microfluidic devices and methods
The invention relates to microfluidic devices and methods that employ electromagnetic radiation to move a droplet of fluid on a fluid-transporting surface of a substrate. Typically, radiation of a...
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6735362 |
Dispersive optical systems utilizing transmissive diffraction gratings
The linear dispersion of a dispersive optical system is increased by: (a) employing a transmissive diffraction grating ( 6 ) as a dispersive element; and (b) passing light through the grating...
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6731839 |
Bulk internal Bragg gratings and optical devices
The present invention provides photonic devices utilized in optical telecommunications. The photonic devices include photosensitive bulk glass bodies which contain Bragg gratings, particularly with...
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6728035 |
Optical device with diffraction grating having plural grating regions
An optical device includes a light-emitting element for irradiating light onto an information recording medium, a diffraction grating for splitting light emitted from said light-emitting element...
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6724533 |
Lamellar grating structure with polarization-independent diffraction efficiency
A lamellar volume grating operating in reflection and transmission and providing a substantially wavelength- and polarization-independent diffraction efficiency is disclosed. The lamellar grating...
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6724532 |
Dual-lens hybrid diffractive/refractive imaging system
The present invention discloses a dual-lens hybrid diffractive/refractive imaging system comprising: a first lens including a concave surface and a convex surface; and the second lens including a...
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6721097 |
Optical element, its manufacturing method and optical element manufacturing metal die
Systems and methods of the present invention are directed to an optical element that includes a diffraction grating, an inclined surface, good optical characteristics, and an optical element...
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6714705 |
Tunable chromatic dispersion and dispersion slope compensator utilizing a virtually imaged phased array and a rotating grating
A tunable chromatic dispersion and dispersion slope compensator that utilizes a Virtually Imaged Phased Array (VIPA), a rotating transmissive diffraction grating, and a mirror with different...
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6707602 |
Reflective spectral filtering of high power extreme ultra-violet radiation
In one embodiment of the invention, a grating structure etched on a mirror substrate has a grating period causing diffracting, out of an optical path, a first incident radiation within a first band...
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6700705 |
Structure arrangement having an optical-diffraction effect
In order to improve a structure arrangement comprising a plurality of portions having a relief structure with an optical-diffraction effect, in particular for visually identifiable optical security...
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6693745 |
Athermal and high throughput gratings
A light dispersing device for dispersing a polychromatic input beam into a plurality of narrow-band output beams such that the output beams are directed in a wavelength dependent manner and such...
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6689855 |
Diffraction devices and methods
Fluoropolymers consisting of alternating perfluorocyclobutane and aryl ether linkages possess suitable properties for optical waveguides and other devices using refractive properties of the...
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6687056 |
Optical head
A lens system includes a lens, a grating and a non-periodic phase structure. The lens system is a-thermalised by a compensation of the temperature-dependence of the spherical aberration of the lens...
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6681067 |
Method for selective erasing/apodization of the index of refraction of an optical waveguide and an optical waveguide modified by the method
A method for erasing some or all of at least some of the grating elements of a grating inscribed in an optical waveguide such as an optical fiber or a cane structure (a more rigid optical...
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6680799 |
Optical polarizing device and laser polarization device
The invention concerns a light reflecting element comprising a substrate ( 10 ), a multilayer mirror ( 20 ) and optical coupling means ( 32, 40 ) comprising a diffraction grating ( 40 ); whereby...
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6671031 |
Method for manufacturing polarization diffraction film
According to the present invention, a method is provided for manufacturing a polarization diffraction film, which comprises the steps of forming a film with a liquid crystal material containing a...
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6661580 |
High transmission optical inspection tools
Techniques for increasing the percentage of light that is transmitted through optical inspection systems that operate in or near the ultraviolet and deep ultraviolet electromagnetic spectrums are...
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6650477 |
Diffractive optical element and optical apparatus having the same
A diffractive optical element includes a diffraction optical part provided with a phase-type diffraction grating. The diffraction grating of the diffraction optical part has on the surface thereof...
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6643066 |
Tunable phase mask assembly
A tunable phase mask assembly for use in photoinducing an optical wavelength filter in an optical waveguide. The phase mask assembly includes a phase mask having a length extending between two...
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6639722 |
Stress tuned blazed grating light valve
A light modulator includes elongated elements arranged parallel to each other and suspended above a substrate. The light modulator operates in a first diffraction mode and in a second diffraction...
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6639721 |
Zoom lens system and optical apparatus using the same
There are provided A zoom lens system comprising, in order from an object side, a first lens unit of negative refractive power, a second lens unit of positive refractive power, a third lens unit of...
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6636666 |
Optical power equalizer
The methods and apparatus according to the invention equalize the power of at least one frequency in a multi-wavelength optical signal, or limit the power contained in a single or multi-frequency...
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6628462 |
Optical system and optical apparatus having the same
An optical system includes, in order from an object side to an image side, a first lens unit of positive optical power, and a second lens unit of negative refractive power, wherein focusing from an...
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6622392 |
Target with diffractive elements for use with laser beam generating devices
A target for use with a laser generating device is disclosed which diffracts a reference laser beam of light directed to the target along an optical axis of the target to provide a diffracted beam...
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6624941 |
Diffraction optical element
A diffraction optical element is configured such that a plurality of annular zones having minute steps extending in a direction of the optical axis therebetween are formed on a base element. The...
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6624940 |
Method for applying optical gradient forces and moving material
An apparatus and method for manipulating small dielectric particles. The apparatus and method involves use of a diffractive optical element which receives a laser beam and forms a plurality of...
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6621631 |
Microsystem module
The invention concerns a microsystem module, in particular for use in microoptical systems, the module consisting of a body on the surface of which at least one functional area and support areas...
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6611385 |
Wearable display system
A wearable display system including a display panel to display a signal processed in a predetermined way. The wearable display system includes a grating to diffract a signal output from the display...
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6611376 |
Diffractive optical element and method of manufacturing the same
The present invention discloses a diffractive optical element whose optical axis can be precisely positioned, and a method of manufacturing the diffractive optical element. The diffractive optical...
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6608720 |
Optical instrument and optical element thereof
An optical instrument is described in which a diffractive element is located at a focal or image plane of the instrument and the diffractive element is effective to produce an array of a plurality...
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6606195 |
Optical unit and optical instrument having the same
An optical unit includes an optical element for propagating incident light toward a predetermined direction, a barrel for supporting the optical element, and an attenuating device including a...
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6603600 |
Chirped pulse amplification method and apparatus
A method of delivering a seed-pulse to a regenerative amplifier includes generating an ultrashort optical pulse. The ultrashort optical pulse is delivered to a single-mode optical fiber configured...
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6600606 |
Projection optical system with diffractive optical element
An optical system includes an aperture stop and binary optics having a plurality of rings disposed adjacent to the aperture stop. The rings of the binary optics have different mutual intervals and...
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6600602 |
Diffraction grating and uses of a diffraction grating
A diffraction grating ( 1 ) has a multiplicity of parallel diffraction structures succeeding one another periodically. The latter are arranged on a support ( 2 ) and each incorporate a slat ( 3 )...
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6594042 |
Optical element, optical pickup, information recording and reproducing method, and polarizing hologram
An optical element that receives a first incident light and a second incident light through a main surface and allowing the first and second incident lights to be transmitted therethrough, the...
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6591039 |
Method and equipment for writing a Bragg grating in a waveguide
A method for writing a Bragg grating in a waveguide comprises the steps of placing the waveguide in a writing position in which the waveguide extends essentially along one axis; generating a beam...
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6590709 |
Diffractive optical element and method of manufacturing a mold
A diffractive optical element acts as a lens. The optical element has a diffraction grating. The diffractive grating is provided with a plurality of ridges. Each of the ridges has a transmissive...
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6587244 |
Optical communication system for survey instrument
The present invention provides an optical communication system, which comprises photodetection means for receiving communication light and optical means for forming an image from the communication...
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6587272 |
Diffractive optical element
A diffractive optical element is composed of a plurality of diffraction gratings which differ in dispersion from each other and are laminated while being spaced to enhance diffraction efficiency...
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6583932 |
Optical system for diffusing light
An improved optical system is provided for diffusing light uniformly over a wide angle, including, a diffractive element for diffracting light received by the system in multiple diffraction orders,...
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6570710 |
Subwavelength optical microstructure light collimating films
A light collimating film has a sheeting having a first side and a second side, wherein the first side includes a series of linear optical elements having a primary axis running the length of the...
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