Title:
EXPOSED PICTURE SWITCHING DEVICE
Document Type and Number:
Japanese Patent JP3152784
Kind Code:
B2
Abstract:
PURPOSE: To prevent the erroneous detection of a frame size in the current photographic printing system.
CONSTITUTION: In this camera, a photographic film 14a is set on a photographic film 'supporting surface curved so that the rear side projects in a film feeding direction to correct the image surface distortion of a photographic lens 23. Two mask plates 50 and 51 for switching a picture exposed on the photographic film 14a to two sizes of a different aspect ratio are provided to freely enter and come out from a photographic optical path. The two mask plates 50 and 51 are formed into a curved shape along the curved shape of the photographic film supporting surface, so that when the masks plates 50 and 51 enter the photographic optical path, gaps between their edges and the surface of the photographic film 14a are made constant in all areas and a line 63 along the film feeding direction of A in the contour of an exposed surface 62 is exposed with a straight line.
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Inventors:
Hisashi Tasaka
Application Number:
JP4019893A
Publication Date:
April 03, 2001
Filing Date:
March 01, 1993
Export Citation:
Assignee:
Fuji Photo Film Co., Ltd.
International Classes:
G03B17/28; (IPC1-7): G03B17/28
Domestic Patent References:
| JP6301105A |
Attorney, Agent or Firm:
Kazunori Kobayashi