LIGHT-PROJECTION DEVICE AND RANGE FINDING APPARATUS THAT USES LIGHT-PROJECTION UNIT
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United States of America Patent
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Issued Date -
Feb 15, 2024
app pub date -
Oct 23, 2023
filing date -
Apr 26, 2021
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Abstract
Disclosed is a light-projection device that is used for a range finding apparatus that computes a distance to an object that has reflected light, by measuring a time difference between a time when light is emitted and a time when reflected light is detected. The light-projection device comprises a light source array in which a plurality of light-emitting elements are two-dimensionally arranged and a light-projection lens that adjusts a light projection range of light emitted from the light source array. The light projection device further comprises a driving device that changes relative positions between the light source array and the light-projection lens and a light source control unit that switches on the light source array under conditions where the light source array is in different positions.
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