Apodizers with relatively high transmittance over an annular region of the exit pupil can reduce the sensitivity to defocusing and to spherical aberration [
Opt. Lett. 11,
1986)]. Here, we analyze the imaging properties (pupil functions, point spread functions, optical transfer functions, and Strehl ratios) of the Bessel type of annular apodizers. We also show some computer-simulated images, obtained with and without this kind of annular apodizer.
© 1987 Optical Society of America
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