Optical design of a color film recorder with PLZT modulators

John F. Carson

doi:10.1117/12.19853

1 August 1990 Optical design of a color film recorder with PLZT modulators

John F. Carson

Proceedings Volume 1254, Optical Hard Copy and Printing Systems; (1990) https://doi.org/10.1117/12.19853
Event: Electronic Imaging: Advanced Devices and Systems, 1990, Santa Clara, CA, United States

Abstract

A continuous tone colour film recorder was constructed that exposes 8 x 10 inch ISO 100 daylight-balanced sheet film in ten minutes at a resolution of 1000 pixels/inch. A rotating drum is used for line scan and a leadscrew driven by a stepper motor for page scan. Film loading and unloading is automatic. Light from a stationary xenon arc lamp is split into red green and blue channel components and conducted to a translating optical system by multimode optical fiber cables. Each colour component is then modulated by a small-area PLZT light valve. An annular portion of the modulated light beam is reflected to a photodetector whose signal is used for closed-loop modulator control. The central transmitted portion of the modulated beam is combined with the other colour components into a single beam. This beam illuminates an aperture that is imaged onto the film. An overview of the mechanical electrical and optical concepts will be presented with emphasis on the optical design. 1.

Citation Download Citation

John F. Carson "Optical design of a color film recorder with PLZT modulators", Proc. SPIE 1254, Optical Hard Copy and Printing Systems, (1 August 1990); https://doi.org/10.1117/12.19853

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