Patent application number | Description | Published |
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 |
20090128903 | POLARIZING BEAM SPLITTER AND OPTICAL APPARATUS INCLUDING THE SAME - A polarizing beam splitter has a periodic structure including a plurality of structured portions periodically disposed in a first direction at intervals equal to or shorter than a used wavelength. The periodic structure satisfies a condition that, of an incident light flux, polarized light that vibrates in one direction is totally reflected. The polarizing beam splitter has an optical interference layer disposed adjacent to the periodic structure and including at least one thin film layer. | 05-21-2009 |
20090296214 | OPTICAL ELEMENT AND OPTICAL APPARATUS - An optical element including a first layer ( | 12-03-2009 |
20100053757 | OPTICAL ELEMENT AND OPTICAL APPARATUS - The optical element includes a base member, and a first layer which is formed on the base member and whose refractive index for a central use wavelength λ changes in a thickness direction of the first layer by 0.05 or more. The first layer has an anti-reflection function and satisfies n | 03-04-2010 |
20100053760 | OPTICAL ELEMENT AND OPTICAL SYSTEM - The optical element includes a base member configured to have an optical surface, a concave-convex structure configured to have an average pitch smaller than a shortest wavelength of a use wavelength range, and an intermediate layer formed between the optical surface and the concave-convex structure, made of a material different from that of the concave-convex structure, and having a refractive index between those of the base member and the material of the concave-convex structure. The optical surface is formed into a shape having a rotational symmetry axis. A thickness of the intermediate layer or each of thicknesses of the intermediate layer and the concave-convex structure varies so as to increase as a distance from the rotational symmetry axis increases. The optical element has good anti-reflection performance not only at a central part of the optical surface having a small curvature radius but also at a peripheral part thereof. | 03-04-2010 |
20100067111 | OPTICAL ELEMENT AND OPTICAL APPARATUS - An optical element includes an optical anisotropic medium | 03-18-2010 |
20100068536 | OPTICAL ELEMENT AND OPTICAL DEVICE INCLUDING THE SAME - In an optical element produced by being immersed in hot water at a temperature in the range of 60° C. to 85° C. for 10 minutes or more, the optical element includes a glass substrate, wherein water resistance and acid resistance of a material constituting the glass substrate satisfies a predetermined conditional expression. | 03-18-2010 |
20100091376 | OPTICAL ELEMENT AND OPTICAL APPARATUS - The optical element includes in order from a light-entering side, a first layer ( | 04-15-2010 |
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 |
20100296168 | OPTICAL ELEMENT, OPTICAL SYSTEM INCLUDING THE OPTICAL ELEMENT, AND OPTICAL APPARATUS INCLUDING THE OPTICAL SYSTEM - An optical element includes a substrate, and an antireflection film provided on a surface of the substrate. The antireflection film is a graded layer having a refractive index that is progressively decreased from the substrate side towards an outer surface of the antireflection film. The graded layer has a reflectivity characteristic occupying ⅔ of a usable wavelength range around the center of the usable wavelength range. Reflectivity of the graded layer at a maximum value of the reflectivity characteristic is a peak value equal to or less than 0.4% The graded layer does not have a maximal value not corresponding to the peak value. At least one of reflectivities at both ends of the usable wavelength range is equal to or less than half the reflectivity at the peak value. | 11-25-2010 |
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 |
20120257277 | OPTICAL ELEMENT AND OPTICAL APPARATUS - An optical element including a first layer ( | 10-11-2012 |
20120262794 | OPTICAL ELEMENT AND OPTICAL SYSTEM - The optical element includes a base member configured to have an optical surface, a concave-convex structure configured to have an average pitch smaller than a shortest wavelength of a use wavelength range, and an intermediate layer formed between the optical surface and the concave-convex structure, made of a material different from that of the concave-convex structure, and having a refractive index between those of the base member and the material of the concave-convex structure. The optical surface is formed into a shape having a rotational symmetry axis. A thickness of the intermediate layer or each of thicknesses of the intermediate layer and the concave-convex structure varies so as to increase as a distance from the rotational symmetry axis increases. The optical element has good anti-reflection performance not only at a central part of the optical surface having a small curvature radius but also at a peripheral part thereof. | 10-18-2012 |
20130135743 | OPTICAL ELEMENT AND OPTICAL APPARATUS - The optical element includes a base member, and a first layer which is formed on the base member and whose refractive index for a central use wavelength λ changes in a thickness direction of the first layer by 0.05 or more. The first layer has an anti-reflection function and satisfies n | 05-30-2013 |