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2. 发明授权

US5444250A Optical warm stop with fresnel type reflective surface 失效
标题翻译：具有菲涅耳型反光面的光学保温
公开(公告)号：US5444250A
公开(公告)日：1995-08-22
申请号：US290314
申请日：1994-08-15
申请人： Dietmar Hanke
发明人： Dietmar Hanke
IPC分类号： F41G1/36 , G01J5/06 , G02B5/00 , G02B5/08 , H01L31/02 , G01J5/08
CPC分类号： G01J5/08 , G01J5/06 , G01J5/0806 , G01J5/0809 , G01J5/0856 , G01J5/047
摘要： An infrared imaging system (10) has a detector assembly (12) positioned for viewing infrared radiation from a subject (20), and a housing (18) enclosing the detector assembly for maintaining the detector assembly at a temperature lower than a temperature of an environment outside the housing, the housing having a window (42) for transmission of radiation from the subject to the detector assembly. A cold stop (46) is located within the housing and a warm stop (48) is located outside the housing for transmitting radiation via their respective apertures (50, 52) from the subject to the detector assembly. The warm stop has a planar retroreflective surface (62) for reflecting rays from the detector assembly back to the detector assembly, thereby to minimize thermal noise. The retroreflective surface is profiled with grooves (66) arranged in a configuration for directing the rays of radiation back to the detector assembly, the configuration of grooves being a Fresnel configuration (62) or a kinoform configuration (62A) or a binary configuration (62B). Any desired location of the warm stop may be employed, even within a lens assembly (26), and any desired configuration of the shape of the aperture may be employed such as a rectangular or square shaped aperture.
摘要翻译：红外成像系统（10）具有定位成用于观察来自对象（20）的红外辐射的检测器组件（12），以及封闭检测器组件的壳体（18），用于将检测器组件保持在低于壳体外部具有用于将辐射从受试者传输到检测器组件的窗口（42）。冷却止挡（46）位于壳体内，并且温室（48）位于壳体外部，用于将辐射通过其相应的孔（50,52）从受试者传送到检测器组件。暖挡具有用于将来自检测器组件的光线反射回检测器组件的平面回射表面（62），从而最小化热噪声。逆反射表面具有凹槽（66），凹槽（66）布置成用于将辐射射线引导回到检测器组件的构造，凹槽的构造是菲涅尔配置（62）或者kinoform配置（62A）或二元配置（62B））。即使在透镜组件（26）内也可以使用温热止挡件的任何期望的位置，并且可以采用孔的形状的任何期望的构造，例如矩形或方形孔。

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