Tokyo, Japan
Tokyo, Japan

Hoya Corporation is a Japanese company manufacturing optical products such as photomasks, photomask blanks and glass magnetic-memory disks, contact lenses and eyeglass lenses using wavefront technology for the health-care market, medical photonics,lasers, photographic filters, and software. The headquarters are in 2-7-5 Naka-Ochiai, Shinjuku, Tokyo. Hoya Corporation is one of the Forbes Global 2000 Leading Companies and Industry Week 1000 Company.Hoya acquired the camera company Pentax in 2007, for the price of US$1 billion, about 10% more than Pentax was valued at the time. In June 2010 the grandson of the corporation's founder Yutaka Yamanaka proposed changes to the Board of Directors to prevent what he called such "mistakes" from happening again.On October 1, 2011, Hoya sold its Pentax camera business to Ricoh. Wikipedia.

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Patent
Hoya Corporation | Date: 2017-01-31

A magnetic-disk glass substrate according to the present invention is a doughnut-shaped magnetic-disk glass substrate having a circular hole provided in the center, a pair of main surfaces, and an outer circumferential end surface and an inner circumferential end surface each including a side wall surface and a chamfered surface that is formed between each main surface and the side wall surface. A measurement point is provided on the outer circumferential end surface every 30 degrees in the circumferential direction with reference to a center of the glass substrate, and when a curvature radius of a shape of a portion between the side wall surface and the chamfered surface is determined at each measurement point, the difference in the curvature radius between neighboring measurement points is 0.01 mm or less.


Patent
Osaka University and Hoya Corporation | Date: 2017-01-25

A therapeutic instrument (20), includes: a support member (25) having a tongue-shaped supporting portion (50) for supporting a sheet-like therapeutic agent; a nozzle member (23) having a cylindrical portion (30) in which the supporting portion (50) supporting the therapeutic agent can be housed, and having an opening (34) through which the supporting portion (50) can be loaded and unloaded in/from a tip of the cylindrical portion (30); a syringe unit (22) that acts a positive pressure in the cylindrical portion (30) for pushing-out the therapeutic agent housed in the cylindrical portion (30) together with the supporting portion (50) to outside the cylindrical portion (30) through the opening (34); and a water flow forming part including a plurality of protrusions (53) formed on a surface of the supporting portion (50) so as to form a water flow at a place where the supporting portion (50) and the therapeutic agent are faced each other, when a medical water is fed into the cylindrical portion (30) in a state in which the therapeutic agent is housed in the cylindrical portion together with the supporting portion (50).


Patent
Hoya Corporation | Date: 2017-01-25

An intraocular lens injector (1) includes: a hollow body having an injector body (5) provided with a lens placement portion (11) on which an intraocular lens is placed, and a screw member (8) with a first threaded portion (8b) formed thereon and connected to a rear end portion of the injector body (5), and rotatable around an axis of the injector body (5) without moving in an axial direction of the injector body; and a moving member (9, 10) having a second threaded portion (9c) that engages with the first threaded portion (8b) from an initial state before use, and configured to release the intraocular lens from a tip of an injection tube 7 by moving in an axial direction of the injector body (5) independently from the screw member (8) due to an engagement of the first threaded portion (8b) and the second threaded portion (9c), during a rotating operation of the screw member (8).


Patent
Hoya Corporation | Date: 2017-01-18

The present invention relates to a method of manufacturing an eyeglass lens comprising a multilayer vapor deposition film directly or indirectly on a lens substrate, which comprises preparing the multilayer vapor deposition film by: forming a first, a second, a third, a fourth, a fifth, a sixth, and a seventh layer each by vapor deposition with a vapor deposition source comprising a main component in the form of SiO_(2), Ta_(2)O_(5) or ZrO_(2), SiO_(2), Ta_(2)O_(5) or ZrO_(2), SiO_(2), Ta_(2)O_(5) or ZrO_(2), and SiO_(2), respectively, wherein the multilayer vapor deposition film sequentially comprises, from the lens substrate side, the first to the seventh layer, the eyeglass lens comprises the multilayer vapor deposition film on both an object-side surface and an eyeball-side surface of the lens substrate, and a reflectance relative to all light rays within 420 to 450 nm wavelength range on an object-side surface and on an eyeball-side surface of the eyeglass lens ranges from 3 to 8 percent.


Patent
Hoya Corporation | Date: 2017-02-15

An image processing device is constituted by a means for, for each pixel in an effective pixel region of an imaging element that cyclically images a subject in a predetermined imaging period, calculating a difference value between a pixel signal of a current imaging period output by the imaging element and a pixel signal of one imaging period earlier; a means for detecting motion of the subject, with the entire effective pixel region as a range; a means for successively setting each of the pixels in the effective pixel region as a pixel of interest; a means for detecting motion of the subject, with a local pixel region that includes the successively set pixel of interest as a range; a means for, for each of the pixels of interest, determining a mixing ratio for the pixel signal of the current imaging period and the pixel signal of one imaging period earlier based on the two detection result; and a means for, for each of the pixels of interest, correcting the pixel signal of the current imaging period based on the determined mixing ratio.


According the present invention, there is provided a glass for use in substrate for information recording medium, which comprises SiO_(2); Al_(2)O_(3); one or more alkali metal oxides selected from the group consisting of Li_(2)O, Na_(2)O and K_(2)O; one or more alkaline earth metal oxides selected from the group consisting of MgO, CaO, SrO and BaO; and one or more oxides selected from the group consisting of ZrO_(2), HfO_(2), Nb_(2)O_(5), Ta_(2)O_(5), La_(2)O_(3), Y_(2)O_(3) and TiO_(2); wherein the contents of various components, in molar percent, are as follows: SiO_(2) : 50, Al_(2)O_(3) : 3, SiO_(2) + Al_(2)O_(3) : 70 to 85; Li_(2)O : 4.3, Na_(2)O : 5, Li_(2)O + Na_(2)O : 24; alkali metal oxides + alkaline earth meal oxides : > 8; MgO : < 3, CaO : 4; and the molar ratios of various components are as follows: ((ZrO_(2) + HfO_(2) + Nb_(2)O_(5) + Ta_(2)O_(5) + La_(2)O_(3) + Y_(2)O_(3) + TiO_(2))/(Li_(2)O + Na_(2)O + K_(2)O + MgO + CaO + SrO + BaO)) : 0.035; (MgO/CaO) : 0.130 to 0.700. Further provided are a substrate for information recording medium, an information recording medium and their manufacturing methods.


Patent
Hoya Corporation | Date: 2017-02-28

A magnetic-disk glass substrate capable of suppressing turbulence of air flow in a vicinity of an outer circumferential side edge portion of the magnetic disk and suppressing disk flutter is provided. This magnetic-disk glass substrate includes a pair of main surfaces, a side wall surface formed on an outer circumferential side edge surface, and chamfered surfaces interposed between the side wall surface and the main surfaces, respectively. The side wall surface has a roundness of 1.5 m or less. A difference in radius between an inscribed circle and a circumcircle of a plurality of outlines of the side wall surface at a plurality of positions that include a central position of the magnetic-disk glass substrate in a thickness direction and are different from each other in the thickness direction is 5 m or less.


An object of the present invention is to provide a mask blank substrate and the like that enables critical defects to be reliably detected as a result of reducing the number of detected defects, including pseudo defects, even when using highly sensitive defect inspection apparatuses that use light of various wavelengths. The present invention relates to a mask blank substrate that is used in lithography, wherein the power spectral density at a spatial frequency of 110^(2 )m^(1 )to 1 m^(1), obtained by measuring a 0.14 mm0.1 mm region on a main surface of the mask blank substrate on the side of which a transfer pattern is formed at 640480 pixels with a white-light interferometer, is not more than 410^(6 )nm^(4), and the power spectral density at a spatial frequency of not less than 1 m^(1), obtained by measuring a 1 m1 m region on the main surface with an atomic force microscope, is not more than 10 nm^(4).


[Problem to be solved] To provide an ultraviolet absorbing paint for forming a coating film that ensures the outstanding durability while markedly inhibiting the generation of stray light in the state of a thin film. [Problem solving means] An ultraviolet absorbing paint characterized by including an oxide precursor of at least one transition metal selected from Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn and Ce, suitably an ultraviolet absorbing paint wherein the oxide precursor of the transition metal is a metal salt, a metal acid salt, or an organic metal compound of at least one transition metal selected from Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn and Ce.


Patent
Hoya Corporation | Date: 2017-04-12

An endoscope, provided with a raising base, is provided, which can securely lock a guidewire using the raising base. In the raising base, which is provided with a treatment-tool support groove and a pair of raising-base side walls on the left and right sides thereof, a inner-to-outer communicably-connected groove which communicably connects the inner side of the treatment-tool support groove with the outer side thereof is formed in at least one of the pair of raising-base side walls; and when the raising base is positioned at the raised position, the guidewire externally projects through the inner-to-outer communicably-connected groove from the treatment-tool support groove to lock-engage with the raising base.

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