CODED RETICLE HAVING A SHIFTED PSEUDO RANDOM SEQUENCE

Optical radiant energy encoding and correlating apparatus for eliminating correlation residues including a movable reticle with a plurality of continuous loop tracks each having the same pseudo random code formed thereon for encoding incident radiation and means for correlating the encoded data with...

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Bibliographic Details
Main Authors STARK E,US, MCCARTHY S,US, ROTH I,US
Format Patent
LanguageEnglish
Published 03.07.1973
Subjects
ANALOGOUS ARRANGEMENTS USING OTHER WAVES
CALCULATING
COMPUTING
COUNTING
DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES
HANDLING RECORD CARRIERS
LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES
MEASURING
OPTICAL COMPUTING DEVICES
PHYSICS
PRESENTATION OF DATA
RADIO DIRECTION-FINDING
RADIO NAVIGATION
RECOGNITION OF DATA
RECORD CARRIERS
TESTING
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Summary:Optical radiant energy encoding and correlating apparatus for eliminating correlation residues including a movable reticle with a plurality of continuous loop tracks each having the same pseudo random code formed thereon for encoding incident radiation and means for correlating the encoded data with a plurality of phase shifted replicas of the pseudo random code, the code in each reticle track being shifted relative to the adjacent tracks by an amount equal to the width of the field focussed on the reticle and a sufficient number of tracks being provided so that the periphery of the field encompasses a complete code.
Bibliography:Application Number: USD3743390