Shutter control device
AssigneeNikon Corporation
InventorKosho Miura
Life of this patent
Estimating the term…
Abstract
A shutter control device comprises an exposing unit for effecting an exposure, a signal generator for generating a release signal, a mirror for reflecting the light of a subject toward a view optical system, a mirror driver for shifting the mirror between a first position on a photographing light path and a second position off the photographing light path, a position detector for detecting that the mirror is present in the vicinity of the second position and generating a position signal, a timer for measuring a predetermined time on receiving the release signal and generating a time measurement end signal when the predetermined time elapses; and a controller means for actuating the exposing unit when receiving the time measurement end signal and the position signal.
Claims12
A shutter control device comprising:
- a shutter having a leading curtain and a trailing curtain;
- a release signal generator;
- a mirror for reflecting light of a subject toward a viewing optical system;
- a mirror driving member for shifting said mirror from a first position on a photographing light path to a second position off said photographing light path;
- a position detector disposed to detect that said mirror reaches the vicinity of said second position, and generating a position signal;
- a timer which starts measuring a predetermined time substantially upon generation of said release signal by said release signal generator and which generates a time measurement end signal when said predetermined time elapses;
- and
- a controller which actuates said leading curtain in response to receiving both of said time measurement end signal and said position signal.
A shutter control device comprising:
- an exposing device having a leading curtain and a trailing curtain;
- a release signal generator;
- a mirror shiftable to a first position on a photographing light path and to a second position off said photographing light path;
- a position detector disposed to detect that said mirror reaches the vicinity of said second position and generating a position signal;
- a timer which starts measuring a predetermined time substantially upon generation of said release signal by said release signal generator and which generates a time measurement end signal when said predetermined time elapses;
- and
- a controller which actuates said leading curtain in response to receipt of said position signal if a detection time from the generation of said release signal to the detection by said position detector is longer than said predetermined time, and in response to receipt of said time measurement end signal if said detection time is shorter than said predetermined time.
Dependencies are inferred from the claim text.