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PATENT ABSTRACTS OF JAPAN
(11)Publication number : 2000-055616
(43)Date of publication of application : 25.02.2000
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(51)Int.Cl. G01B 11/00
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(21)Application number : 10-241113 (71)Applicant : FUJI XEROX CO LTD
(22)Date of filing : 12.08.1998 (72)Inventor : TOKAI KEN
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(54) THREE-DIMENSIONAL IMAGE PICKUP METHOD AND DEVICE
(57)Abstract:
PROBLEM TO BE SOLVED: To precisely perform the range finding of a wide range with a simple light source by projecting a projecting light changing with time to a subject to be measured, and decoding the reflected light from the subject to be measured according to the time change of the projecting light.
SOLUTION: A projecting light 2 changing with time projected from a stroboscopic light source 1 is diffusively reflected by the surface of a subject 9 to be measured, and a reflected light 3 reaches a light receiving optical system 41. The reflected light 3 passes an intensity modulator 42 arranged on the imaging surface of the light receiving optical system 41 and reaches a light receiver 43. The intensity modulator 42 decodes the reflected light 3 with an intensity modulation based on the signal from a phase shifter 6. Namely, the reflected light 3 is decoded according to the time change of the projecting light 2. The decoded light is received by the light receiver 43, converted into an electric signal and accumulated for a fixed time. The distance information and luminance information are calculated from the decoded and accumulated signals by an unknown variable calculating processor 7 and stored in a three- dimensional image memory 8. |
