JPS55141605A - Measuring apparatus of laser beam diameter - Google Patents
Measuring apparatus of laser beam diameterInfo
- Publication number
- JPS55141605A JPS55141605A JP4994479A JP4994479A JPS55141605A JP S55141605 A JPS55141605 A JP S55141605A JP 4994479 A JP4994479 A JP 4994479A JP 4994479 A JP4994479 A JP 4994479A JP S55141605 A JPS55141605 A JP S55141605A
- Authority
- JP
- Japan
- Prior art keywords
- laser beam
- counter
- level
- output
- comparator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To enable direct reading of laser diameter by means of a counter, by supplementing the points of two or more levels set on the basis of the maximum power level, and measuring the beam diameter from the interval of these points.
CONSTITUTION: An opening 16 is formed in part of a disc form rotating body 15, and a knife edge 2 is provided on each side, and the rotating body 15 is rotated at a constant speed V, so that a laser beam 1 may cross the knife edges 2. Since the point of pulse Sp is the point where the knife edges 2 do not cut off the laser beam 1, the output signal of an amplifier 4 is a voltage V corresponding to the maximum power level of the laser beam, and this voltage V is held. The output of this sample holding circuit 8 is set, for instance, to 0.9V level by means of a variable resistor 10, and to 0.1V level by means of a variable resistor 11. The counting of a counter 12 is started by an output pulse P9 from a comparator 6, and the number of pulses Pc from an oscillator 13 is counted, and the counting of the counter 12 is stopped by the output pulse P1 from a comparator 7. Then, this counted value is displayed on a display unit 14.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4994479A JPS55141605A (en) | 1979-04-23 | 1979-04-23 | Measuring apparatus of laser beam diameter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4994479A JPS55141605A (en) | 1979-04-23 | 1979-04-23 | Measuring apparatus of laser beam diameter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55141605A true JPS55141605A (en) | 1980-11-05 |
Family
ID=12845126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4994479A Pending JPS55141605A (en) | 1979-04-23 | 1979-04-23 | Measuring apparatus of laser beam diameter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55141605A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5100231A (en) * | 1989-04-27 | 1992-03-31 | Coherent, Inc. | Apparatus for measuring the mode quality of a laser beam |
US5909274A (en) * | 1997-03-07 | 1999-06-01 | Cise S.P.A. | Device for the characterization of laser beams |
-
1979
- 1979-04-23 JP JP4994479A patent/JPS55141605A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5100231A (en) * | 1989-04-27 | 1992-03-31 | Coherent, Inc. | Apparatus for measuring the mode quality of a laser beam |
US5909274A (en) * | 1997-03-07 | 1999-06-01 | Cise S.P.A. | Device for the characterization of laser beams |
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