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首页> 外文会议>Conference on Optical Design and Engineering; Sep 30-Oct 3, 2003; St.Etienne, France >Simulation of focus invariant optical systems
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Simulation of focus invariant optical systems

机译：聚焦不变光学系统的仿真

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Normally depth of focus and resolution of an optical system are complementary parameters. According to an established technique known as wavefront coding the depth of focus can be enhanced by inserting a phaseplate with a cubic surface function into the exit pupil plane of an optical system. Although contrast is reduced the image quality can be restored very efficiently by inverse filtering because the modulation transfer function (MTF) almost does not change when the system is defocused. In addition the MTF has no zero crossings. Therefore inverse filtering has no singularities. Thus, three dimensional objects can be imaged with microscopes with a large depth of focus. The waveoptical performance of a commercial microscope equipped with a cubic phase plate has been simulated. The simulation results are discussed and compared with experimental data. The system has been analyzed both regarding effects specifically related to the phase plate design and regarding effects related to the optical properties which result from the combination of the phase plate with the microscope system. A variable phase plate design is also presented which can be adapted to specific objects and optical systems.
机译：通常，聚焦深度和光学系统的分辨率是互补参数。根据已知的称为波前编码的技术，可以通过将具有立方表面功能的相位板插入光学系统的出射光瞳平面中来增强焦点深度。尽管降低了对比度，但是通过逆滤波可以非常有效地恢复图像质量，因为当系统散焦时，调制传递函数（MTF）几乎不会改变。另外，MTF没有零交叉。因此，逆滤波没有奇异之处。因此，可以用具有大焦点深度的显微镜对三维物体成像。已经模拟了配备有立方相板的商用显微镜的波光学性能。对仿真结果进行了讨论，并与实验数据进行了比较。已经分析了该系统的有关与相板设计特别相关的效果以及与由相板与显微镜系统结合产生的光学特性相关的效果。还提出了一种可变相板设计，可以适用于特定的物体和光学系统。

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