Measuring device for laser beam

Abstract

Abstract PURPOSE:To enable simple and direct measurement of the shape of the laser beam by transferring a pin hole at a right angle to the laser beam and receiving the output of the passed laser beam by a photodetector. CONSTITUTION:The incident beam 1 is limited to a part of the cross section of the beam by the pin hole fitted to a movable mechanism plate 8 and enters the photodetector 3, while the output thereof is given to an amplifier 5 as the voltage of load resistance 4 between both ends and further is inputted in the Y axis of an X-Y recorder 6. When a transverse transfer dial 10 is turned for moving the plate 8, the sliding part (c) of a transfer amount detecting resistance 11 is turned and thereby the voltage between (a) and (c). This voltage between (a) and (c) is given to the X axis of the recorder 6. When the dial 10 is turned, a gear 9 is rotated and the plate 8 moves perpendicularly to the beam 1, moving the pin hole 2 as well. Next, by moving a dial gage 7, the transfer amount is measured. By calibration of the transfer amount of the pin hole 2 and the amount of deflection of the X axis of the recorder, the distribution of strength of the beam is obtained.

Inventors

• 👤 Norio Takahashi

Bibliographic Details