Measuring Aperture Camera
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-03
This article describes and illustrates improvements to aperture cameras which reduce the time required to create apertures for use with artwork generators by simplifying some steps in the current process. An aperture camera is used to reduce by a factor of 10 an image master and place the reduced image on an aperture blank. Alignment of the master and blank is extremely important. The present camera design has a fixed aperture blank holding station. It occurs with some frequency that the master to be reduced is not easily rotationally alignable with the optical axis of the camera because of some defect in the master. Further, with the present design the user must expose a test blank and process it completely before measuring on a separate device for correct size alignment and rotation.