发明申请
- 专利标题: Attenuating filter for ultraviolet light
- 专利标题(中): 紫外线衰减滤光片
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申请号: US10998050申请日: 2004-11-29
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公开(公告)号: US20050179996A1公开(公告)日: 2005-08-18
- 发明人: Bernhard Weigl , Hans-Jochen Paul , Eric Eva
- 申请人: Bernhard Weigl , Hans-Jochen Paul , Eric Eva
- 专利权人: CARL ZEISS SMT AG
- 当前专利权人: CARL ZEISS SMT AG
- 优先权: DE10127225.1 20010522
- 主分类号: G02B5/22
- IPC分类号: G02B5/22 ; C03C17/34 ; G02B1/11 ; G02B5/20 ; G02B5/08
摘要:
An attenuating filter provides a prescribed attenuation of the intensity of transmitted, short-wavelength, ultraviolet light, in particular, at wavelengths below 200 nm, that is governed by a predefinable spatial distribution of its spectral transmittance. The filter has a transparent substrate (3), e.g. fabricated from crystalline calcium fluoride. A filter coating (5) fabricated from a dielectric material that absorbs over a predefined wavelength range is applied to at least one surface (4) of the substrate. In the case of operating wavelengths of about 193 nm, the filter coating consists largely of tantalum pentoxide. Filters of the type, which may be inexpensively fabricated with high yields, are noted for their high abilities to withstand laser radiation and may be effectively antireflection coated employing simply designed antireflection coatings.
公开/授权文献
- US07196842B2 Attenuating filter for ultraviolet light 公开/授权日:2007-03-27
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