Abstract

Through an analysis using the transfer function of a pinhole camera, the multiple imaging characteristics of photographic diffusers described by Grover and Tremblay [ Appl. Opt. 21, 4500 ( 1982)] is studied. It is found that only one pinhole diameter satisfies the optimum imaging condition for best contrast transfer at any desired spatial frequency. A simple method of generating random pinhole arrays with a controlled pinhole diameter is described. These pinhole arrays are later used to generate high frequency sinusoidal gratings from a coarse grid. The contrast in the final gratings is found to be reasonably high.

© 1987 Optical Society of America

Observation of a phase object using a multipinhole camera

A. G. Apostolidis and E. D. Vanidhis
Appl. Opt. 25(23) 4321-4324 (1986)

Optical image subtraction using multiple-imaging effect of photographic diffusers

C. P. Grover
J. Opt. Soc. Am. A 1(2) 145-148 (1984)

Imaging with photographic diffusers

C. P. Grover and R. Tremblay
Appl. Opt. 21(24) 4500-4504 (1982)

Multiple imaging and multichannel optical processing with split lenses

A. Senthil Kumar and R. M. Vasu
Appl. Opt. 26(24) 5345-5349 (1987)

Acquisition of 3-D data by focus sensing utilizing the moire effect of CCD cameras

Kai Engelhardt
Appl. Opt. 30(11) 1401-1407 (1991)