Focus detection apparatus of camera
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 18, 1990
Grant Date -
N/A
app pub date -
Nov 16, 1987
filing date -
Nov 20, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the present apparatus, a field mask is arranged at the predetermined focal plane of a photographic lens of a camera. This mask is formed with central rectangular opening horizontally and a pair of side rectangular openings vertically extending. Light bundles passed through these rectangular openings are subjected to condensation by passing through respective condenser lenses. At a downstream, there is provided a re-imaging plate which is formed with corresponding three pairs of re-imaging lenses. All these re-imaging lenses are made into plano-convex shape having one and the same radius of curvature and molded solid with the substrate board of said re-imaging plate into a solid one piece.
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