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Proceedings Paper

New design of the illuminating system for transmission film copy
Author(s): Ales A. Pesl
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Paper Abstract

There are a number of illuminating system for film copy based on the well known dichroic mirrors and electromagnetic slits -- valves. Light of a lamp illuminator is reflected separately on two mirrors (red and blue) and thus the third green channel is subtracted. Intensity of light in each channel is controlled by electromagnetic valve and then the final color is formed in the exit slit behind a tappered lightguide by mixing of the three principal colors. The new design of an illuminator working in a pulse mode being introduced in this paper is maintained with no mechanically moving parts. Principal part of the new illuminator is a cube-formed electro- optic modulator. The new illuminator operates at higher frequency of color modulation, with higher energy transmission (by 50% over the classical illuminator), and with the setting of greater number of color modes (73 intensity levels of each principal color). Moreover there is more compact design of the illuminating module over the one with mirrors and the new module can be easily connected with a computer control.

Paper Details

Date Published: 1 June 1991
PDF: 7 pages
Proc. SPIE 1448, Camera and Input Scanner Systems, (1 June 1991); doi: 10.1117/12.45360
Show Author Affiliations
Ales A. Pesl, Krizik Co. (Czech Republic)


Published in SPIE Proceedings Vol. 1448:
Camera and Input Scanner Systems
Winchyi Chang; James R. Milch, Editor(s)

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