1 December 1991 Off-axis spherical element telescope with binary optic corrector
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Teledyne Brown Engineering designed, fabricated and tested an infrared telescope using only spherical mirror elements. Aberrations were corrected with a binary optic pattern etched onto a germanium lens. The telescope is an F/3, off-axis Gregorian design with no obscuration. The field-of-view (FOV) is 4x8 degrees and it operates in the 8 to 12 micron waveband, with an entrance pupil of 5 cm. The telescope demonstrates that a single binary optical element can correct a significant amount of both pupil- and field-dependent aberrations introduced by tilted spherical mirrors, while maintaining a broad wavelength band of operation. The line spread functions, measured at 10 microns on the telescope, coincided very well with theoretical line spread functions generated by a commercial lens design code.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Daniel M. Brown, Daniel M. Brown, Alan D. Kathman, Alan D. Kathman, "Off-axis spherical element telescope with binary optic corrector", Proc. SPIE 1555, Computer and Optically Generated Holographic Optics; 4th in a Series, (1 December 1991); doi: 10.1117/12.50627; https://doi.org/10.1117/12.50627


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