Patent application number | Description | Published |
20090046371 | COLOR SEPARATION/COMBINATION PRISM AND IMAGE-PROJECTION APPARATUS - A color separation/combination prism is disclosed which has an optical film arrangement capable of performing color separation, light analysis and color combination. The prism includes four prism members and at least five optical surfaces as outer surfaces thereof. Each of the prism members has at least three optical surfaces including two optical surfaces which intersect orthogonally with each other at a first side thereof. The four prism members are joined together such that the first sides of the prism members are adjacent to or contact each other. Joining portions of the four prism members are provided with wavelength-selective polarizing films. | 02-19-2009 |
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 |
20100053559 | IMAGE PROJECTION APPARATUS AND IMAGE DISPLAY SYSTEM - An image projection apparatus includes light sources | 03-04-2010 |
20100066892 | IMAGE PICKUP APPARATUS - An image pickup apparatus includes an image pickup optical system and an image pickup unit configured to receive an image formed by the image pickup optical system. The image pickup optical system includes an optical element having optical incident and optical emergent surfaces disposed between an aperture stop and an object and a fine textured structure having a mean pitch shorter than a wavelength of visible light and formed on at least one of the optical incident and optical emergent surfaces. The conditions 3.503-18-2010 | |
20100290133 | OPTICAL SYSTEM AND OPTICAL EQUIPMENT INCLUDING THE SAME - Provided is an optical system with an excellent anti-reflection effect and ghost suppression effect including an aspherical lens having at least one of an incident surface and an exiting surface of an optical glass formed of an aspherical surface, in which: the aspherical surface includes an anti-reflection structure formed thereon, the anti-reflection structure having an anti-reflection function and including multiple inorganic structural parts finer than a used wavelength; and the aspherical surface has a point that satisfies the following expression: |(1/Rm−1/Rs)/Rm|>5.0×10 | 11-18-2010 |
20110242662 | ANTI-REFLECTION STRUCTURE AND OPTICAL APPARATUS - The anti-reflection structure includes a graded refractive index layer that is disposed on a substrate and whose refractive index decreases as a distance from the substrate increases, and a homogeneous layer that is disposed on the graded refractive index layer and whose refractive index is homogeneous. The structure satisfies a condition of nb−na>0.10 where na represents the refractive index of the homogenous layer, and nb represents a homogenous layer side effective refractive index of the graded index refractive index layer. | 10-06-2011 |
20120062995 | OPTICAL ELEMENT WITH ANTIREFLECTION FUNCTION AND OPTICAL APPARATUS INCLUDING THE SAME - An optical element having antireflection function includes a substrate including a first relief structure on a surface, the first relief structure including at least a convex shape and a concave shape being arrayed with a pitch of at most a half of a wavelength λ, and a thin film layer including a thin film of at least one layer on the first relief structure, wherein the thin film layer has a refractive index lower than the refractive index of the substrate, and when the thin film layer includes at least two thin films more, the thin film layer are arranged in order of decreasing the refractive index from a side of the substrate toward a side of air, and the following conditional expression is satisfied: | 03-15-2012 |
20120293703 | IMAGE PICKUP APPARATUS - An image pickup apparatus includes an image pickup optical system and an image pickup unit configured to receive an image formed by the image pickup optical system. The image pickup optical system includes an optical element having optical incident and optical emergent surfaces disposed between an aperture stop and an object and a fine textured structure having a mean pitch shorter than a wavelength of visible light and formed on at least one of the optical incident and optical emergent surfaces. The conditions 3.511-22-2012 | |
20130034711 | OPTICAL ELEMENT, AND OPTICAL SYSTEM AND OPTICAL APPARATUS USING SAME - The optical element of the present invention has an anti-reflection film formed on a substrate. The anti-reflection film comprises a low refractive index layer that is formed by mutually binding hollow fine particles, each of which has a vacancy therein, using a binder, and the low refractive index layer consists of a first layer serving as an outermost layer and a second layer which is adjacent to the first layer and is located on the substrate side. Here, the filling ratio of the binder to the first layer is lower than the filling ratio of the binder to the second layer, the refractive index of the first layer is 1.1 or more but not more than 1.25 and the refractive index of the second layer is 1.26 or more but not more than 1.35 | 02-07-2013 |
20140133032 | OPTICAL ELEMENT HAVING ANTIREFLECTIVE FILM, OPTICAL SYSTEM, AND OPTICAL APPARATUS - An optical element includes a substrate that is transparent, and an antireflective film laminated on the substrate. The antireflective film includes, in order from the substrate, a first layer, a second layer, and a third layer. The substrate has a refractive index of 1.80 to 2.05 for the d-line. The first layer is an inorganic oxide film having a refractive index of 1.43 to 1.47 for the d-line and a physical film thickness of 29.0 to 40.0 nm and containing silica as a main component. The second layer is an inorganic oxide film having a refractive index of 2.00 to 2.20 for the d-line and a physical film thickness of 12.0 to 41.0 nm. The third layer is a film having a refractive index of 1.23 to 1.26 for the d-line and a physical film thickness of 110.0 to 130.0 nm and containing silica nanoparticles. | 05-15-2014 |
20140377531 | OPTICAL ELEMENT, OPTICAL SYSTEM, AND OPTICAL APPARATUS - An optical element includes a substrate, and an antireflection film laminated on the substrate. The antireflection film includes, in order from the substrate side, a first layer including a plurality of dielectric thin films, a second layer including hollow particles bound by a dielectric material, and a third layer laminated on the second layer and made of a homogeneous dielectric. The hollow particles have an average particle diameter of 60 nm or less. A filling rate of the hollow particles in the second layer is 65% or higher. | 12-25-2014 |