Reticle for use in a guidance seeker for a spinning projectile
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United States of America Patent
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Mar 19, 2002
Issued Date -
N/A
app pub date -
May 1, 2000
filing date -
Jan 2, 1997
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Expired
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Abstract
A reticle for a guidance seeker for spinning projectiles comprises a substrate; a pattern of a plurality of alternating light modulating structures, such as opaque and light transmitting, or light absorbing and light reflecting areas on the substrate such that an image of a target moving on the substrate will generate a plurality of pulses corresponding to the number of lines crossed by the image, the number of pulses increasing as the image moves outwardly from the center of the reticle; and a distinguishable, unambiguous, and singly periodic feature of the pattern, which is readily detectable every time the target image moves circumferentially, completing a full circle around the center of the reticle.
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