Patent application number | Description | Published |
20080198333 | POLARIZATION BEAM SPLITTER AND PROJECTION APPARATUS HAVING THE SAME - The present invention provides a polarization beam splitter including a multilayer film formed by laminating a first layer having a refractive index in a first range, a second layer having a refractive index in a second range which does not overlap the first range, and a third layer having a refractive index in a third range which does not overlap the first or second range in the order of the first layer, the second layer, the first layer, and the third layer in succession, wherein the transmittance of s-polarized light is 60% or more higher than the transmittance of p-polarized light in a first wavelength region, the transmittance of p-polarized light is equal to or higher than 70% in a second wavelength region different from the first wavelength region, and each of the first wavelength region and the second wavelength region has a bandwidth equal to or larger than 30 nm. | 08-21-2008 |
20080239493 | DIFFRACTIVE OPTICAL ELEMENT AND OPTICAL SYSTEM USING THE SAME - A diffractive optical element includes stacked first and second diffraction gratings made of different materials. The materials of the first and second diffraction gratings are glass. The first and second diffraction gratings have grating surfaces contacted to each other. The materials satisfy a predetermined condition when Tg | 10-02-2008 |
20090067053 | OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS HAVING SAME - An optical system includes an optical element formed of resin. On at least one of optical surfaces on the light incidence side of the optical element formed of resin, a plurality of depressions or protrusions of a size not larger than the wavelengths of visible light is formed without a periodic structure or in a random arrangement. | 03-12-2009 |
20090231712 | DIFFRACTIVE OPTICAL ELEMENT, OPTICAL SYSTEM, AND OPTICAL APPARATUS - The diffractive optical element includes a first diffraction grating and a second diffraction grating, which are formed of materials different from each other, the first diffraction grating and the second diffraction grating are stacked so as not to provide any air layer therebetween. The diffractive optical element satisfies conditions of nd109-17-2009 | |
20100053559 | IMAGE PROJECTION APPARATUS AND IMAGE DISPLAY SYSTEM - An image projection apparatus includes light sources | 03-04-2010 |
20100252942 | DIFFRACTIVE OPTICAL ELEMENT AND OPTICAL SYSTEM USING THE SAME - A diffractive optical element includes stacked first and second diffraction gratings made of different materials. The materials of the first and second diffraction gratings are glass. The first and second diffraction gratings have grating surfaces contacted to each other. The materials satisfy a predetermined condition when Tg | 10-07-2010 |
20110013284 | DIFFRACTIVE OPTICAL ELEMENT CONTAINING GRATING SURFACE AND GRATING WALL SURFACE, AND OPTICAL SYSTEM HAVING THE SAME - A diffractive optical element has higher diffraction efficiency of diffracted light of a designed order in a visible wavelength range. The diffractive optical element includes a diffraction grating part provided on a lens surface of an optical system and constituted by laminating first and second diffraction gratings made of two different materials. Each of the first and second diffraction gratings includes a grating surface and a grating wall surface. The grating surfaces of the first and second diffraction gratings are in contact with each other. The diffraction grating part has the designed order of at least +2nd order and has a grating height of at least 6 μm. | 01-20-2011 |
20110304915 | DIFFRACTIVE OPTICAL ELEMENT, OPTICAL SYSTEM, AND OPTICAL APPARATUS - A diffractive optical element includes a first diffraction grating and a second diffraction grating, and a thin film which is arranged at least part of an interface between the first diffraction grating and the second diffraction grating, includes a single layer or multiple layers made of a material different from that of each of the first and second diffraction gratings, and is transparent to light of a working wavelength range. nd | 12-15-2011 |
20110304916 | DIFFRACTIVE OPTICAL ELEMENT, OPTICAL SYSTEM, AND OPTICAL APPARATUS - A diffractive optical element includes a first diffractive grating including a first grating surface and a first grating wall surface, a light shielding member disposed on the first grating wall surface, and a second diffractive grating including a second grating surface and a second grating wall surface, disposed so that the second grating surface contacts the first grating surface and the second grating wall surface contacts the light shielding member. An extinction coefficient k of a material that constitutes the light shielding member meets the expression of 0.00112-15-2011 | |
20110304917 | DIFFRACTIVE OPTICAL ELEMENT, OPTICAL SYSTEM, AND OPTICAL APPARATUS - A diffractive optical element used as a lens of an optical system includes a first diffractive grating that includes a first grating surface and a first grating wall surface, a reflective member disposed on the first grating wall surface, and a second diffractive grating that includes a second grating surface and a second grating wall surface, and that is disposed so that the second grating surface contacts the first grating surface and the second grating wall surface contacts the reflective member. When off-screen light having an incident angle larger than that of off-axis light flux enters the diffractive optical element at a predetermined incident angle, an emission angle of light having the maximum intensity emitted from the first or second grating wall surface is appropriately set. The maximum width of the reflective member and a grating pitch of each of the first and second diffractive gratings are appropriately set. | 12-15-2011 |
20110304918 | DIFFRACTIVE OPTICAL ELEMENT, OPTICAL SYSTEM, AND OPTICAL APPARATUS - A diffractive optical element includes a first diffraction grating and a second diffraction grating which are made of materials different from each other and are stacked in an optical axis direction, and a thin film which is arranged at least part of an interface between the first diffraction grating and the second diffraction grating, includes a single layer or multiple layers made of a material different from that of each of the first and second diffraction gratings, and is transparent to light of a working wavelength range. nd112-15-2011 | |
20120008209 | DIFFRACTIVE OPTICAL ELEMENT AND OPTICAL SYSTEM INCLUDING THE SAME - A diffractive optical element includes a diffraction grating portion including a first diffraction grating and a second diffraction grating, the first diffraction grating and the second diffraction grating being formed of different materials and being stacked so that grating surfaces thereof are in contact with each other, in which the first diffraction grating is formed of a first grating material having at least three kinds of materials mixed therein, and the following conditions are satisfied: nd101-12-2012 | |
20120087008 | DIFFRACTIVE OPTICAL ELEMENT, OPTICAL SYSTEM, AND OPTICAL APPARATUS - A diffractive optical element includes first and second diffraction gratings. A grating wall surface of the second diffractive grating is located on a surface extending a grating wall surface of the first diffractive grating or on a low refractive index region side of the first diffractive grating with respect to the surface extending the grating wall surface of the first diffractive grating. + | 04-12-2012 |
20120262788 | DIFFRACTIVE OPTICAL ELEMENT, OPTICAL SYSTEM AND OPTICAL APPARATUS - A diffractive optical element is made by layering first and second diffractive gratings. A difference of an extinction coefficient to d-line between the two materials of each of the first and second diffractive grating is larger than 0.0002 and smaller than 0.002. The following conditional expressions are satisfied 0.05<|Δnd | 10-18-2012 |
20130094073 | VARIABLE TRANSMITTANCE ELEMENT, OPTICAL SYSTEM, AND OPTICAL APPARATUS UTILIZING ELECTROCHROMIC MATERIAL - A variable transmittance element includes two substrates, two transparent electrode layers held between the two substrates, an electrochromic layer held between the two transparent electrode layers and having transmittance that is reversibly changed by electric control, and a first dielectric layer provided between one of the two substrates and one of the two transparent electrode layers closest to the one of the two substrates and configured to reduce reflections. The first dielectric layer is a multilayer film made by alternately laminating two or more layers each having a high refractive index and two or more layers each having a low refractive index, a refractive index difference for a wavelength of 550 nm between the layer having the high refractive index and the layer having the low refractive index being 0.2 or more. | 04-18-2013 |
20130155514 | DIFFRACTIVE OPTICAL ELEMENT, OPTICAL SYSTEM, AND OPTICAL APPARATUS - A diffractive optical element made by adhering a first diffractive grating and a second diffractive grating to each other, each of which has a blazed structure. At least one of the first and second diffractive gratings is made of a material having a refractive index distribution in a plane normal direction, and the predetermined expressions are satisfied for a wavelength λ in a visible wavelength range. | 06-20-2013 |
Patent application number | Description | Published |
20120077448 | ANTENNA WITH BUILT-IN FILTER AND ELECTRONIC DEVICE - Disclosed is an antenna with a built-in filter, the antenna being implemented in an electronic device, comprising: an antenna element; and a circuit board unit connected to the antenna element, wherein the circuit board unit includes: a filter circuit that filters input and output signals of the antenna element; and a matching circuit that performs impedance matching of the antenna element. | 03-29-2012 |
20120165081 | MOBILE DEVICE - A mobile device of the present invention having an upper case, a lower case arranged under the upper case, and a middle case arranged inside the upper case and the lower case, includes a first engaging section which is provided in the peripheral edge portion of the undersurface of the upper case, a second engaging section which is provided in the peripheral edge portion of the top surface of the middle case and engages with the first engaging section, a third engaging section which is provided in the peripheral edge portion of the undersurface of the middle case, and a fourth engaging section which is provided in the peripheral edge portion of the top surface of the lower case and engages with the third engaging section. | 06-28-2012 |
20130194733 | ELECTRONIC DEVICE - An electronic device of the present invention is provided with a cover which is rotatably attached to a device case in an openable/closable manner and conceals a storage section provided in the device case; an operating member which is rotatably attached to the device case and exposed outside of the device case; and a lock member which locks the cover in a state where the cover conceals the storage section, and lifts the cover upward in an opening direction when the lock on the cover is released by a rotation operation of the operating member. | 08-01-2013 |