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MTF performance verification of an athermalized large-aperture IR optical system for space environment

机译:用于太空环境的无热大孔径红外光学系统的MTF性能验证

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We develop an athermalized IR optical system operating in the temperature range of 10 degrees C-30 degrees C in vacuum. As large defocus errors can occur in IR optical systems in such an environment, we estimate the amount of defocus induced by the thermoelastic effect, thermo-optic effect, and air-to-vacuum transition. Furthermore, we measure the modulation transfer function (MTF) performance of our IR optical system in a thermal vacuum chamber. Our athermal system design and accurate estimation of the air-to-vacuum transition effect enable the realization of a stable IR optical system for a space environment, which exhibits an MTF value greater than 18%. (C) 2016 Optical Society of America
机译:我们开发了一种在真空中在10摄氏度至30摄氏度的温度范围内运行的无热红外光学系统。由于在这种环境下红外光学系统中可能会出现较大的散焦误差,因此我们估计了由热弹性效应,热光效应和空气-真空跃迁引起的散焦量。此外,我们在热真空室内测量红外光学系统的调制传递函数(MTF)性能。我们的无热系统设计和对空气到真空过渡效应的精确估计,使得能够为空间环境实现稳定的IR光学系统,该系统的MTF值大于18%。 (C)2016美国眼镜学会

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