发明授权
- 专利标题: Visible transmitting and infrared reflecting filter
- 专利标题(中): 可见透射和红外反射滤光片
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申请号: US944136申请日: 1978-09-20
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公开(公告)号: US4229066A公开(公告)日: 1980-10-21
- 发明人: James D. Rancourt , William T. Beauchamp
- 申请人: James D. Rancourt , William T. Beauchamp
- 申请人地址: CA Santa Rosa
- 专利权人: Optical Coating Laboratory, Inc.
- 当前专利权人: Optical Coating Laboratory, Inc.
- 当前专利权人地址: CA Santa Rosa
- 主分类号: C03C17/34
- IPC分类号: C03C17/34 ; G02B5/28
摘要:
Visible transmitting and infrared reflecting filter having a substrate formed of a material capable of transmitting visible light or absorbing visible light and having a surface and a coating carried by the surface of the substrate. The coating comprises at least one period of a multilayer stack which is reflecting in the infrared and transmitting at shorter wavelengths. The period is formed of a plurality of layers of high and low index materials with alternate layers being formed of materials having a high index of refraction and the other layers being formed of materials having a low index of refraction. At least one anti-reflection layer is disposed between adjacent layers of the period for matching the layers of the period to each other in the visible so that the transmission of the filter is relatively high over a relatively wide wavelength band at shorter wavelengths while maintaining high reflection and low absorption at the longer wavelengths.
公开/授权文献
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