We introduce a new system for single-lens single-image incoherent passive ranging. The only a priori object information this system requires is that the objects to be ranged must possess a low-pass spatial frequency spectrum. Physically, this system for passive ranging is a standard optical imaging system that is customized with a special-purpose optical mask or filter. Analytically, this optical mask customizes the transfer function of the optical system in such a way that objects form images that contain range-dependent information. This range-dependent information lies in the spatial spectrum nulls or zeros of the image.
© 1994 Optical Society of America
Original Manuscript: January 3, 1994
Revised Manuscript: April 14, 1994
Published: October 10, 1994
Edward R. Dowski and W. Thomas Cathey, "Single-lens single-image incoherent passive-ranging systems," Appl. Opt. 33, 6762-6773 (1994)