We present designs of 1.65 NA visible imaging lens with 1.75 mm field size and 20X magnification. Small obscuration is enabled using semi-transparent annular surface or novel multi reflections optical element.
© 2014 OSA
T. T. Elazhary, N. Masatsugu, M. Miyawaki, and J. M. Sasian, "Hyper NA Catadioptric Imaging Lens," in Classical Optics 2014, OSA Technical Digest (online) (Optical Society of America, 2014), paper IM3B.1.
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