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:
Jun. 06, 2006
Filed:
Oct. 26, 2001
Applicant:
Mikio Okamoto, Yokohama, JP;
Inventor:
Mikio Okamoto, Yokohama, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/28 (2006.01); G02B 5/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical glass for polarizing optical system having a photoelastic constant C in the range of −0.2 to +0.5 [10cm/N] with respect to a wavelength of 633 nm, the optical glass having the following composition (1): composition (1): when represented in terms of wt. % of oxides:SiO: 17.0–27.0% (35.5–57.0 mol %)LiO+NaO+KO: 0.5–5.0% (0.7–20.0 mol %)PbO: 72.0–75.0% (39.1–45.0 mol %)AsO+SbO: 0.1–3.0% (0.1–2.0 mol %).