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    • 2. 发明授权
    • Optical system with a window having a conicoidal inner surface, and testing of the optical system
    • 具有锥形内表面的窗口的光学系统和光学系统的测试
    • US06180938B2
    • 2001-01-30
    • US09187432
    • 1998-11-05
    • Blake G. CrowtherDean B. McKenneyScott W. SparroldJames B. Mills
    • Blake G. CrowtherDean B. McKenneyScott W. SparroldJames B. Mills
    • H01J314
    • F42B10/46F41G7/2253F41G7/2293
    • An optical system includes a window made of a curved piece of a transparent material having an inner surface and an outer surface. The inner surface has a nominal inner surface shape defined by a first conicoidal relationship, and the outer surface has a nominal general aspheric surface shape. The optical system also typically includes a sensor and an optical train on the side of the inner surface of the window. The accuracy of the shape of the inner surface is tested by directing a coherent light beam through a remote focus of the inner surface, reflecting the light beam from the inner surface toward an adjacent focus of the inner surface, reflecting the light beam from a spherical reflector at the adjacent focus of the inner surface and back toward the inner surface, reflecting the light beam from the inner surface back toward the remote focus, and interferometrically comparing the reflected beam arriving at the remote focus with a reference beam.
    • 光学系统包括由具有内表面和外表面的透明材料的弯曲件制成的窗户。 内表面具有由第一锥形关系限定的标称内表面形状,并且外表面具有标称的一般非球面表面形状。 光学系统通常还包括在窗的内表面一侧的传感器和光学系列。 通过将相干光束引导通过内表面的远焦点来测试内表面的形状的精度,将来自内表面的光束反射到内表面的相邻焦点,将来自球形的光束 反射器在内表面的相邻焦点处并且朝向内表面反射,将来自内表面的光束反射回远焦点,并且将到达远焦点的反射光束与参考光束进行干涉比较。