Abstract

The ZAPP/PC system records interferograms through a video frame grabber. Its processing options include the ability to record binary files that contain video intensity data, fringe center locations, wavefront phase maps on a uniform grid or Zernike coefficients. A utility program, called ZA, was developed at SGT to allow additional data processing capabilities. ZA allows the user to access all the ZAPP/PC binary file types for processing on an IBM compatible personal computer that has EGA or VGA color graphics capability. ZAPP/PC software is not needed for this off-line processing. Video intensity files and phase map files can be displayed in false color on the computer monitor, including all file identification fields. An option is provided to store the phase map on disk as a video intensity file, with encoded peak to valley and contour step size graphics. This file can be displayed on the ZAPP/PC TV monitor, and hard copies are produced on the video thermal printer. Phase map data are processed to provide phase gradient statistics and plots. ZA is written in MICROSOFT QUICKBASIC 4.5.

© 1991 Optical Society of America