JPS55141605A - Measuring apparatus of laser beam diameter - Google Patents

Measuring apparatus of laser beam diameter

Info

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
Application number
JP4994479A
Other languages
Japanese (ja)
Inventor
Takashi Otobe
Chiaki Kojima
Yutaka Oki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP4994479A priority Critical patent/JPS55141605A/en
Publication of JPS55141605A publication Critical patent/JPS55141605A/en
Pending legal-status Critical Current

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
JP4994479A 1979-04-23 1979-04-23 Measuring apparatus of laser beam diameter Pending JPS55141605A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
SE7609263L (en) PROCEDURE FOR DETERMINING THE QUANTITY OF CERTAIN IN A BIOLOGICAL LIQUID SOLUBLE COMPONENT, AND APPARATUS FOR EXERCISING THE PROCEDURE
JPS5693079A (en) Measurement of time duration
JPS6445050A (en) Mass spectrometer for secondary ion
JPS55141605A (en) Measuring apparatus of laser beam diameter
JPS55144575A (en) Background compensation type plutonium air monitor
JPS5714983A (en) Control device for starting position of picture recording
JPS5661064A (en) Recording device using disc shape recording medium
JPS5647976A (en) Recording position detection system
JPS5682413A (en) Counter circuit of digital measuring instrument
JPS5494083A (en) Speed sygnal detector
JPS5478184A (en) Frequency analytical apparatus
SU949409A1 (en) Device for checking cutting tool bluntness degree
JPS5683875A (en) Tape residual quantity display circuit
SU631909A1 (en) Differentiator
GB1325583A (en) Apparatus for sensing a quantity
JPS5687859A (en) Speed alarming device for automobile
JPS5722525A (en) Rotary body balancing device
JPS56157844A (en) Humidity detector
JPS54108614A (en) Count display system
JPS55138619A (en) Measuring apparatus of laser beam diameter
JPS5682464A (en) Partial discharge measuring method of power cable
JPS5661065A (en) Record player
JPS55140157A (en) Detector for number of revolution
JPS5334503A (en) Record player
JPS5560862A (en) Automatically-balanced measuring instrument