The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 2006
Filed:
Jun. 29, 2001
Xuelu Zou, Akishima, JP;
Hiromasa Tawarayama, Fussa, JP;
Kazutaka Hayashi, Akishima, JP;
Hiroshi Kawazoe, Yokohama, JP;
Xuelu Zou, Akishima, JP;
Hiromasa Tawarayama, Fussa, JP;
Kazutaka Hayashi, Akishima, JP;
Hiroshi Kawazoe, Yokohama, JP;
Hoya Corporation, Tokyo, JP;
Abstract
An optical glass having a high refractive index and high dispersion characteristics suitable for application to precision press molding to precisely mold final products without requiring grinding or polishing. An optical glass can be prepared exhibiting a refractive index in the range of from 1.75 to 2.0, and an Abbé number in the range of from 20 to 28.5. Optical parts comprised of this glass; press-molding materials comprised of this glass; methods of manufacturing the same; and methods of manufacturing molded glass products employing these materials. A suitable optical glass is composed of the following in molar percent: 15–30% PO; 0.5–15% BO; 5–25% NbO; 6–40% WO; 4–45% of at least one of LiO, NaO or KO; 1–5% KO; 2–9% TiO; and 0–30% (excluding 30%) of at least one RO selected from among BaO, ZnO, and SrO; with the total content of the above-stated components being equal to or more than 95 percent.