Abstract

A new method of obtaining amplitude modulation (AM) for determining target location with spinning reticles is presented. The method is based on the use of graded transmission capabilities. The AM spinning reticles previously presented were functions of three parameters: amplitude vs angle, amplitude vs radius, and phase. This paper presents these parameters along with their capabilities and limitations and shows that multiple parameters can be integrated into a single reticle. It is also shown that AM parameters can be combined with FM parameters in a single reticle. Also, a general equation is developed that relates the AM parameters to a reticle transmission equation.

© 1991 Optical Society of America

Parameters of spinning FM reticles

Ronald G. Driggers, Carl E. Halford, Glenn D. Boreman, Douglas Lattman, and Kevin F. Williams
Appl. Opt. 30(7) 887-895 (1991)

Comparison of AM and FM Reticle Systems

Robert O’B. Carpenter
Appl. Opt. 2(3) 229-236 (1963)

Effect of phasing-sector angular extent in FM reticles

Ronald G. Driggers, Carl E. Halford, Martin M. Meads, and Glenn D. Boreman
Appl. Opt. 31(22) 4578-4581 (1992)

Comparison of continuous and discrete frequency-versus-radius frequency-modulated reticles

James S. Taylor, Ronald G. Driggers, Carl E. Halford, Jeffrey S. Sanders, Steven T. Griffin, and Michael Wellfare
Appl. Opt. 31(10) 1638-1640 (1992)

Analysis of Error Response of Amplitude Modulated Reticles*

Paul E. Mengers and Kathryn B. O’Brien
J. Opt. Soc. Am. 54(5) 668-671 (1964)