Title:
LASER POWER DETECTION DEVICE
Document Type and Number:
Japanese Patent JP2003294526
Kind Code:
A
Abstract:
To measure a power accurately over long hours just after reception of a laser beam in a laser power detection device for measuring the power of the laser beam mainly in an infrared region or of several W or more.
This device is equipped with an operation means 5 for calculating the laser power based on the difference between the output of a first temperature detection means 2 and the output of a second temperature detection means 3 for detecting the temperatures of two points on a light receiving plate 1 in a noncontact way, to thereby compensate the influence of fluctuation of an ambient temperature.
Inventors:
SHIMADA TAKUO
CHO YOSHITERU
SUGATA FUMIO
SHIBATA YASUO
CHO YOSHITERU
SUGATA FUMIO
SHIBATA YASUO
Application Number:
JP2002098371A
Publication Date:
October 15, 2003
Filing Date:
April 01, 2002
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G01J1/02; G01J1/42; G01J5/02; G01J5/12; G01J5/14; (IPC1-7): G01J1/02; G01J1/42; G01J5/02
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)
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