Shutter, in particular for an objective, and a CCD-camera
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United States of America Patent
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Aug 12, 2003
Grant Date -
N/A
app pub date -
Jun 10, 1999
filing date -
Jun 18, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A shutter for use as an objective for improving the depth of focus in a camera is disclosed. The shutter has, in a central area, a radially uniform transmission function averaged over the circumferential angle. The radial transmission function first drops off toward zero in a radial transition area which is a continuation of the central area and which has a quantity n of cutouts which extend toward the radial outside and are spaced apart from one another at equal angles 360.degree./n in the circumferential direction. The quantity n of cutouts has the value 5, 6 or 7.
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