Spectra 5.0.5 that could have been downloaded from our website for free. You can install this PC program on Windows XP/Vista/7/8/10/11 32-bit. Commonly, this program's installer has the following filenames: CameraTest.exe, Editor.exe, Play.exe, SpcStart.exe and Spectra.exe etc. This software is an intellectual property of Micro Air Corp. The most popular versions of the Spectra are 5.0, 2.0 and 1.1. The program lies within Education Tools, more precisely Science Tools.
From the developer:
SPECTRA -- The program for computation and simulation of the spectral properties of a substance in a wide band of frequencies.
Copyright © by Sidorovich A.M.
You may want to check out more software, such as SpectR-Pro, Spectra Precision Survey Office or Time Mysteries: The Ancient Spectres Collector's Edition, which might be related to Spectra.