Ahigh-resolution color film recorder was designed and developed that is capable of continuous tone color exposure of photographic positive and negative films in 8 in. x 10 in. single sheet formaL Exposure time for a full sheet is 10 minutes at a fixed resolution of 1000 pixels[mch. The film recorder employs small area light valves and a xenon arc light source along with the necessary optical and electrical components to provide the exposure control. The design of an exposure control system requires an understanding of the entire film recording system including ''well-defined'' performance requirements. A brief description of the film recorder will be given along with a more detailed discussion of the exposure control system design. The use of PLZT light valves in a continuous tone film writer presents many challenging electrical optical and mechanical problems. Special emphasis will be placed on the PLZT light valve geometry transfer characteristics (including nonlinearity hysteresis and drift) internal power dissipation and the associated control electronics needed to make this technology capable of meeting our performance requirements. 1.
James C. Erwin,
"Exposure control system for a color film recorder with PLZT modulators", Proc. SPIE 1254, Optical Hard Copy and Printing Systems, (1 August 1990); doi: 10.1117/12.19854; https://doi.org/10.1117/12.19854