Invention Grant
- Patent Title: Highly refractive and highly transparent optical glass
- Patent Title (中): 高折射和高度透明的光学玻璃
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Application No.: US12958540Application Date: 2010-12-02
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Publication No.: US08476177B2Publication Date: 2013-07-02
- Inventor: Simone Ritter , Ute Woelfel , Stefanie Hansen
- Applicant: Simone Ritter , Ute Woelfel , Stefanie Hansen
- Applicant Address: DE Mainz
- Assignee: Schott AG
- Current Assignee: Schott AG
- Current Assignee Address: DE Mainz
- Agent Michael J. Striker
- Priority: DE102009047511 20091204
- Main IPC: C03C3/155
- IPC: C03C3/155 ; C03C3/15 ; C03C3/068
Abstract:
The optical glass has a refractive index nd of 1.945≦nd≦1.97, an Abbe number νd of 33≦νd≦36, and a composition with the following components in amounts expressed in % of their cations, with respect to the total number of cations in the composition: B3+, 35-46; La3+, 25-35; Ta5+, 6-14; W6+, 6-13; Zr4+, 1-7; Gd3+, 0-5; Nb5+, 0-4; Y+3, 0-4; Ba2+, 0-2; Σ alkaline earth metal cations, 0-2, Σ La3++Ta3++W6++Zr4++Gd3++Nb5++Y3+≧50; and at least one fining agent, 0-0.3. Also a ratio of B3+ to La+3 is 1.1 to 1.6 and a ratio of B3+ to Σ Si+4+B3+ is ≧0.5. The glass is free of lead, arsenic, Ti4+, Th4+, Zn2+, F−, and Hf+4.
Public/Granted literature
- US20110136652A1 HIGHLY REFRACTIVE AND HIGHLY TRANSPARENT OPTICAL GLASS Public/Granted day:2011-06-09
Information query
