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    • 1. 发明申请
    • Lens correction element, system and method
    • 镜头校正元件,系统和方法
    • US20060245071A1
    • 2006-11-02
    • US11119471
    • 2005-04-29
    • David GeorgeWilliam SchluchterRobert Belt
    • David GeorgeWilliam SchluchterRobert Belt
    • G02B3/12
    • G02B3/12
    • A lens assembly is provided that has an index-of-refraction invariant structure. In one embodiment, a void between two lenses or lens elements in a lens assembly is filled with a desired gas, liquid or vacuum, the gas, liquid or vacuum having a pre-determined index of refraction. Once the void has been filled with the desired gas or liquid or been drawn down to a complete vacuum, the void is sealed by any of numerous appropriate means to render it leaktight. The lens assembly may then be tested or calibrated to ensure an appropriate level of optical performance prior to subsequent deployment under actual field conditions. Because the vacuum or filled void disposed in the lens assembly provides optical performance that is index-of-refraction invariant, the lens assembly may be employed successfully under widely varying atmospheric conditions and yet still provide the same high quality results.
    • 提供了具有折射不变结构的透镜组件。 在一个实施例中,透镜组件中的两个透镜或透镜元件之间的空隙填充有期望的气体,液体或真空,气体,液体或真空具有预定的折射率。 一旦空隙填充了所需的气体或液体或被抽出到完全的真空状态,空隙就被许多适当的方法中的任何一种密封,以使其密封。 然后可以对透镜组件进行测试或校准,以确保在实际现场条件下随后部署之前适当水平的光学性能。 因为设置在透镜组件中的真空或填充的空隙提供作为折射率不变量的光学性能,所以可以在广泛变化的大气条件下成功地使用透镜组件,但仍然提供相同的高质量结果。
    • 4. 发明申请
    • Interferometer for measuring perpendicular translations
    • 用于测量垂直平移的干涉仪
    • US20070041022A1
    • 2007-02-22
    • US11205368
    • 2005-08-16
    • William Schluchter
    • William Schluchter
    • G01B9/02G01B11/02
    • G01B9/02016G01B9/02003G01B2290/70G03F7/70775
    • An interferometer provides a large dynamic range for perpendicular displacement measurements. In operation, a measurement reflector on an object reflects a measurement beam to an overlying Porro prism, and a reference reflector on the object returns a reference beam to the interferometer. A second Porro prism in the interferometer can return the reference beam for a second pass to the reference reflector, while the measurement beam complete only one pass. Reductions in beam walk-off result from retroreflections in the Porro prisms and the matching effects that some object rotations have on measurement and reference beams. Perpendicular motion of the object relative to the first Porro prism causes a Doppler shift only in the measurement beam. Accordingly, a beat frequency found when combining the measurement and reference beams can indicate a residual Doppler shift associated with the motion in the perpendicular direction.
    • 干涉仪为垂直位移测量提供了大的动态范围。 在操作中,物体上的测量反射器将测量光束反射到覆盖的波罗棱镜上,并且物体上的参考反射器将参考光束返回到干涉仪。 干涉仪中的第二个波罗棱镜可以将参考光束返回给参考反射器,而测量光束只能完成一次通过。 波罗的光束偏移减少导致波罗棱镜中的反射和一些物体旋转对测量和参考光束的匹配效应。 物体相对于第一波罗棱镜的垂直运动仅在测量光束中产生多普勒偏移。 因此,当组合测量和参考光束时发现的拍频可以指示与垂直方向上的运动相关联的残余多普勒频移。