发明名称 |
Optical reflector, illumination optical system, light source system and illumination optical apparatus |
摘要 |
An optical illumination system according to the present invention is provided with an optical reflector for illuminating a surface to be illuminated in the shape of arc or annulus. A reflective plane of the optical reflector is shaped in a special curved surface. Specifically, an arbitrary parabola with a first axis passing through the vertex and the focus of the parabola is rotated about a second axis passing through a point located on the opposite side of the directrix of the parabola with respect to the focus and being parallel to the directrix. The rotation of the parabola yields a parabolic toric surface. The reflective plane of the optical reflector has the curved surface constituting at least a part of the parabolic toric surface. The reflective plane so shaped reflects a light source image emitted from a light source system to illuminate the surface to be illuminated in the shape of arc or annulus.
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申请公布号 |
US5640284(A) |
申请公布日期 |
1997.06.17 |
申请号 |
US19940330393 |
申请日期 |
1994.10.27 |
申请人 |
NIKON CORPORATION |
发明人 |
TANITSU, OSAMU;MORI, TAKASHI;HIROSE, HIDEO |
分类号 |
G02B5/10;G03F7/20;(IPC1-7):G02B5/10;G02B27/02;G02B17/00;G02B21/06 |
主分类号 |
G02B5/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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