Generation Of Moire Contours With Acousto Optic Cells

Joel H. Blatt; Huey-Chin Cheng Ho; Eddie H. Young

doi:10.1117/12.7977076

1 September 1989 Generation Of Moire Contours With Acousto Optic Cells

Joel H. Blatt, Huey-Chin Cheng Ho, Eddie H. Young

Author Affiliations +

Optical Engineering, Vol. 28, Issue 9, 289996 (September 1989). https://doi.org/10.1117/12.7977076

Abstract

Moire contours are seen on a curved surface viewed through a grating when the surface is illuminated with a matched grating. We have been able to replace both the projection and viewing physical gratings with gratings of variable spacing generated in acousto-optic (AO) cells and have been able to observe and record moire contours. The gratings are generated by amplitude modulating 70 MHz AO cells with a 1 to 10 MHz square wave. The gratings become visible on the curved object when the illuminating laser beam is strobed with 50 ns pulses by means of an AO modulator. We give data showing the variation in grating spacing with AO modulation frequency. Figures show the variation of the moire contour spacing with the AO modulation frequency and with target contour. The results for an angled flat plate target are compared with those in the literature.

Citation Download Citation

Joel H. Blatt, Huey-Chin Cheng Ho, and Eddie H. Young "Generation Of Moire Contours With Acousto Optic Cells," Optical Engineering 28(9), 289996 (1 September 1989). https://doi.org/10.1117/12.7977076

Published: 1 September 1989

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available