Photon Engineering FRED, Digitizer

Digitizer

Very often vendors supply users with data in graphical form. This data might be transmission/reflection data from a coating measurement, emission spectra data from a source measurement, dispersion data, part drawings, etc. Converting this graphical data into numerical data with a ruler and calculator is tedious, error-prone, and time consuming at best.

In order to make this task less laborious, FRED has a built-in digitizer with which the user can retrieve the numerical data in a more direct fashion. From various places within FRED, the user opens a digitizer dialog, selects the graphic file (bmp, jpg, pcx, tga, and tif file formats are supported), marks the fiducials, and then interrogates/digitizes the graphic. (Once the fiducials are marked, FRED indicates the cursor coordinates in both graphic and pixel formats.) Data captured by the digitizer can be exported back into FRED or written to a disk file for later use in FRED or other application.

Digitizing a Transmission Plot

FRED ’s digitizer may be used to digitize

•	Refractive index plots
•	Wavelength apodization plots
•	Reflection/transmission plots
•	Geometry as represented by segmented curves