Focusing type distance measurement apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 22, 2004
Grant Date -
May 8, 2003
app pub date -
Aug 5, 2002
filing date -
Aug 6, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
By providing a diffusing plate between a laser diode and an objective lens, a measurement light flux emitted from the laser diode is irradiated on a corner cube in a defocused state via the objective lens. The light flux having been reflected at corner cube sustains the defocused state. The reflected light flux having been reflected at and having exited the corner cube becomes condensed onto an avalanche photodiode through the objective lens. Even when a vibration occurs at the corner cube, the reflected light flux is received at the avalanche photodiode as long as the light flux having been reflected at and having exited the corner cube is within the predetermined range.
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