Design of light path structure for movable quantum cascade laser-terahertz digital holographic imager
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摘要: 为了满足移动式量子级联激光器太赫兹（QCL-THz）全息成像仪大视场高空间分辨率的技术需求，设计了预放大同轴数字全息光路结构，显微物镜数值孔径为0.707或0.8，放大倍数为6倍，最佳工作距离为15 mm。采用波长为96.8 m的QCL光源，该光路结构能实现10 mm的视场，优于100 m的空间分辨率。Abstract: The light path of digital holographic microscope in line is designed to meet the requirements of high spatial resolution and big field of view which are the key parameters of the movable quantum cascade laser-terahertz (QCL-THz) digital holography imager. The numerical aperture of the microscope objective is 0.707 or 0.8, the amplification times is 6 and the optimal working distance is 15 mm. It can be achieved that the field of view is 10 mm and the spatial resolution is 100 micron in this light path using terahertz source whose wavelength is 96.8 microns.
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Key words:
- quantum cascade laser /
- THz /
- digital holography /
- light path structure
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