Optical glass

Details Optical glass Optical glass

2004-10-26

2008-05-06

Group, Karl E (Department: 1793)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S079000

Reexamination Certificate

active

07368404

ABSTRACT:
An optical glass having a refractive index (nd) and Abbe number (νd) within a range enclosed with a border line consisting of straight lines connecting point A (nd being 1.75 and νd being 50.0), point B (nd being 1.80 and νd being 46.0), point C (nd being 1.80 and νd being 50.0) and point D (nd being 1.75 and νd being 56.0) in the order of the point A, the point B, the point C, the point D and the point A in x-y rectangular coordinates in which x coordinate represents Abbe number (νd) and y coordinate represents refractive index (nd), including refractive index (nd) and Abbe number (νd) on the border line except for the straight line connecting the point A with the point D and the straight line connecting the point B with the point C, containing, as essential components, SiO2, B2O3, La2O3, Gd2O3, Li2O and F, and being substantially free of As2O3.

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EPO Search Report, Mar. 24, 2005.

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