JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
Online ISSN : 1349-838X
Print ISSN : 0019-2341
ISSN-L : 0019-2341
A New Double-Reticle Method for Optical Target-Coordinator
Masaru TsudagawaHisao YamadaSuteo Tsutsumi
Author information
JOURNALS FREE ACCESS

1983 Volume 67 Issue 2 Pages 100-105

Details
Abstract

The optical target-coordinator is the important element in automatic infrared tracking systems for moving target. In this paper, we propose a method for optical-coordinator which is possible to determine the coordinates of the target with its surrounding background noise. This system has two kinds of optical modulating discs aligned with cascade on co-optical-axis and rotated in one direction with different velocity.
One of them is an involute reticle reported previouslly by the authors, which has excellent characteristics for suppression of background noise. And the other is used for determination of the target location, named “coordinate reticle” here.
Usually, the problem in such a double reticle system is a false signal causd by projection from the front reticle to the rear ond. This is, however, avoidable by means of separating each main path-band of spatial transfer function of two reticles. Validity of this approch is proved theoretically and experimentally. And effectiveness for the coordinator is confirmed through some experimental results.

Information related to the author
© The Illuminating Engineering Institute of Japan
Previous article
feedback
Top