G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 7/02 (2006.01) G02B 7/08 (2006.01) G03B 27/34 (2006.01) G03B 27/46 (2006.01) G03B 27/52 (2006.01) G03B 27/53 (2006.01) G03B 27/54 (2006.01) G03F 7/20 (2006.01)
Patent
CA 2151754
A photographic printing apparatus for printing an image projected from a film on to a photosensitive material is disclosed. The apparatus has a lens system for forming the image of the film located at an exposing position on the photosensitive material, a lens-system drive mechanism for supporting and moving the lens system along an optical axis thereof, a temperature sensor for detecting an ambient temperature around the lens-system drive mechanism, and a control device connected with the temperature sensor and the lens-system drive mechanism. The control device has a memory for storing position correction information for the lens system at each possible temperature and a driver for outputting a correction operation signal obtained based on the correction information to the lens-system drive mechanism. Depending on an operation condition of the photographic printing apparatus, a timing of outputting the correction operation signal from the driver to the lens-system drive mechanism is determined.
Marks & Clerk
Noritsu Koki Co. Ltd.
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