Optical leverage telecentric scanning apparatus

Optical leverage telecentric scanning apparatus for scanning a large format film transparency for optical power spectrum analysis, comprising

• (a) means supporting the transparency at a given location;
• (b) means supplying a collimated laser beam;
• (c) refraction means for laterally translating said collimated beam across the transparency;
• (d) optical leverage means for magnifying said collimated beam, said optical leverage means including
• (1) a first lens arranged between said laser beam supply means and said refraction means, and
• (2) a concave parabolic mirror arranged between said refraction means of magnification afforded by said first lens and said mirror being equal to the ratio of the focal lengths of said mirror to said first lens, respectively;
• (e) detector means arranged on the opposite side of the transparency from said refraction means for detecting the scan pattern produced by the laser beam which is passed through the transparency, whereby said refraction means and said optical leverage means produce a magnified scan pattern for optical power spectrum analysis of said transparency;
• and a transform concave parabolic mirror arranged between the transparency and said detector means for focusing said scan pattern from the transparency on said detector means.