Patent application number | Description | Published |
20090099002 | OPTICAL GLASS, PREFORM FOR PRECISION PRESS MOLDING, METHOD FOR MANUFACTURING PREFORM FOR PRECISION PRESS MOLDING, OPTICAL ELEMENT, AND METHOD FOR MANUFACTURING OPTICAL ELEMENT - The present invention relates to an optical glass having optical constants in the form of a refractive index nd of 1.70 or higher and an Abbé number nud of 50 or higher, a preform for precision press molding comprised of this glass, an optical element comprised of this glass, and methods for manufacturing the preform and the optical element. | 04-16-2009 |
20090314033 | GLASS MATERIAL FOR MOLD PRESSING AND METHOD FOR MANUFACTURING OPTICAL GLASS ELEMENT - A glass material for mold pressing, comprising a core portion comprised of an optical glass with a degree of abrasion FA of 200 or higher and a covering portion comprised of a second glass covering at least a portion of the surface of said core portion. A method for manufacturing an optical glass element, wherein a glass material that has been preformed to a prescribed shape is heat softened and press molded with a pressing mold and the outer perimeter portion of the molded product obtained is removed by mechanical processing. The above-mentioned glass material for mold pressing is used as the glass material. To provide a means whereby an optical element does not bear scratches on optically functional surfaces through contact during handling after the press molding of press molded glass products despite being comprised of a glass material with a high degree of abrasion, and a means whereby even when scratched, the function of the optical element finally obtained is unaffected. | 12-24-2009 |
20100018252 | METHOD FOR MANUFACTURING OPTICAL GLASS ELEMENT - A method for manufacturing an optical glass element, comprising: annealing a press-molded product obtained by press molding into a lens shape a glass material comprised of a core portion comprised of an optical glass (first glass) with a transition temperature of 550° C. or higher and a covering portion comprised of a second glass covering the surface of said core portion; and then removing the covering layer from the surface of the press-molded product to obtain an optical glass element. To provide a method for manufacturing high-optical-performance mold-pressed lenses in which the defective external appearance of optical elements comprised of high-temperature glass materials with a Tg of 550° C. or higher is prevented. | 01-28-2010 |
20100292066 | GLASS MATERIAL FOR MOLD PRESSING, METHOD FOR MANUFACTURING SAME, AND METHOD FOR MANUFACTURING OPTICAL GLASS ELEMENT - A glass material for mold pressing, comprised of a core portion comprised of a multicomponent optical glass containing at least one readily reducible component selected from among W, Ti, Bi, and Nb, and a covering portion covering the surface of said core portion, comprised of a multicomponent glass containing none or a lower quantity of said readily reducible component than is contained in said core portion. A glass material for mold pressing comprising a core portion comprised of a fluorine-containing multicomponent optical glass and a covering portion covering the surface of said core portion, comprised of a multicomponent glass containing none or a lower quantity of fluorine than is contained in said core portion. A method for manufacturing an optical glass element comprising heat softening a glass material that has been preformed into a prescribed shape, and conducting press molding with a pressing mold, employing the above glass material of the invention. To provide a stable production of optical elements affording adequate optical performance by using optical glass containing readily reducible components or fluorine and inhibiting undesirable interface reactions during press molding. | 11-18-2010 |
20110143907 | OPTICAL GLASS, PREFORM FOR PRECISION PRESS MOLDING, AND OPTICAL ELEMENT - The present invention relates to an optical glass with a high refractive index and good precision press moldability, and a preform for precision press molding and an optical element that are comprised of the optical glass. The present invention further relates to a method of manufacturing an optical element, a lens unit being equipped with an optical element and an image pickup device being equipped with a lens unit. | 06-16-2011 |
20120142516 | OPTICAL GLASS, GLASS MATERIAL FOR PRESS-MOLDING, AND OPTICAL ELEMENT - The disclosed is an optical glass having ultrahigh refractive index and high dispersion characteristics in the form of a refractive index nd exceeding 2.05 and an Abbe number vd of 18.5 or lower and of permitting the stable production of high-quality glass from a glass melt; and a glass material for press molding and an optical element comprised of the optical glass. The optical glass is in the form of an oxide glass and comprises, denoted as cationic percentages,
| 06-07-2012 |
20120238433 | OPTICAL GLASS, GLASS MATERIAL FOR PRESS MOLDING, AND OPTICAL ELEMENT - An optical glass in the form of an oxide glass, characterized by comprising, denoted as cation percentages:
| 09-20-2012 |
20120272684 | METHOD FOR MANUFACTURING GLASS, METHOD FOR MANUFACTURING GLASS MATERIAL FOR PRESS MOLDING, AND METHOD FOR MANUFACTURING OPTICAL ELEMENT - A method for manufacturing glass containing a component(s) from Bi | 11-01-2012 |