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:
Oct. 22, 2002
Filed:
Jul. 17, 2001
Applicant:
Inventors:
Yoshio Mori, Sagamihara, JP;
Muneo Nakahara, Sagamihara, JP;
Assignee:
Kabushiki Kaisha Ohara, Sagamihara, US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/07 ;
U.S. Cl.
CPC ...
C03C 3/07 ;
Abstract
An optical glass comprises the following composition in mass percent of: SiO 18-29%; PbO 68-78%; and TeO 0.1-3.5%; wherein the glass has optical constants which are a refractive index (nd) having a range of 1.75 to 1.87 and an Abbe number (&ngr;b) having a range of 21 to 28; and a wavelength of a light transmitted through the glass having a thickness of 10±0.1 mm at a transmittance of 80% by including a reflection loss, is not more than 420 nm.