Title:
OPTICAL INFORMATION PROCESSING DEVICE
Document Type and Number:
Japanese Patent JP3690888
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To extract the sectional image information of the part existing at the optional depth of a three dimensional object by high space resolving power.
SOLUTION: A laser beam whose wave length varies with the passage of time is emitted from a semiconductor laser 24, and branched into a measured object 36 and the side of the whole reflection mirror 34 by a beam splitter 30. The interference light image of a light path length decided by the characteristics of variation of the wave length of a laser beam is formed of the reflection beam of the measured subject 36 and light phase modulated by a phase modulater 32 on the beam splitter 30. After the interference light image is converted into an electric charge distribution through a space light modulating tube 44, light read out from an other laser generating device 48 is irradiated onto the space light modulating tube 44 to read out the interference light image corresponding to the electric charge distribution for photographing it by a video camera 58. The characteristics of variation of the wave length of the laser beam is varied to change the light path length for extracting the sectional image information of the optional part in the direction of depth of the measured object 36.
Inventors:
Kazuo Hotate
What origin
Toru Okugawa
Naohisa Kousaka
What origin
Toru Okugawa
Naohisa Kousaka
Application Number:
JP29213996A
Publication Date:
August 31, 2005
Filing Date:
November 01, 1996
Export Citation:
Assignee:
Hamamatsu Photonics Co., Ltd.
International Classes:
G01B11/24; (IPC1-7): G01B11/24
Domestic Patent References:
| JP5118816A | ||||
| JP277604A |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Tatsuya Shioda
Shiro Terasaki
Kazuo Yoshii
Tatsuya Shioda
Shiro Terasaki
Kazuo Yoshii