Linear shutter and method to achieve uniform density of...

Details Linear shutter and method to achieve uniform density of... Linear shutter and method to achieve uniform density of...

G - Physics

03

B

95/51

G03B 35/14 (2006.01) G03B 27/00 (2006.01) G03B 35/04 (2006.01)

Patent

CA 2023482

A method and apparatus for achieving uniform density of image elements of a 3-D photograph by using a 3-D printer with a linear motion blade shutter which travels at varying speeds during printing a negative view to control the duration of exposure across the 3-D photograph. The scanning speed of the linear shutter is varied during the exposure of each of the 2-D negative views and is based upon the position of the 2-D negative view in relation to the field of illumination of the enlarging lens in order to compensate for the non-uniformity of illumination due to the vignetting effect.

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