JPH01164432U

JPH01164432U -

Info

Publication number: JPH01164432U
Application number: JP5876288U
Authority: JP
Priority date: 1988-04-30
Filing date: 1988-04-30
Publication date: 1989-11-16

Description

[Brief explanation of the drawing]

第１図は本考案の１実施例に係る閉鎖状態のプ
ログラムシヤツタを撮影レンズ側から見た正面図
、第２図は第１図に示すプログラムシヤツタの全
開状態の正面図、第３図は光センサの１例を示す
断面図、第４図は第１図及び第２図に示す光セン
サの出力パルスを示すタイムチヤート、第５図及
び第６図は第１図及び第２図に示すプログラムシ
ヤツタの変形例を示す正面図、第７図は本考案の
他の実施例に係る全開状態のプログラムシヤツタ
を撮影レンズ側から見た正面図。１…シヤツタ地板、２・３…シヤツタ羽根、４
・５…検出マーク列、６・７…光センサ、８…光
センサ、１２・１３…シヤツタ羽根、１７・１８
…検出マーク列、１９・２０…光センサ。 FIG. 1 is a front view of a program shutter in a closed state according to an embodiment of the present invention as seen from the photographing lens side, FIG. 2 is a front view of the program shutter shown in FIG. 1 in a fully open state, and FIG. is a cross-sectional view showing one example of the optical sensor, FIG. 4 is a time chart showing the output pulses of the optical sensor shown in FIGS. 1 and 2, and FIGS. 5 and 6 are the same as in FIGS. FIG. 7 is a front view showing a modified example of the program shutter shown in FIG. 7, and FIG. 7 is a front view of the program shutter in a fully open state according to another embodiment of the present invention, as seen from the photographic lens side. 1...Shutter base plate, 2.3...Shutter blade, 4
・5...Detection mark row, 6.7...Photo sensor, 8...Photo sensor, 12.13...Shutter blade, 17.18
...Detection mark row, 19/20... Optical sensor.

Claims

[Claims for Utility Model Registration] (1) A reflection type or transmission type detection mark array is provided along the traveling motion line of the blade, and the detection mark array is detected by an optical sensor disposed on a passing line of the detection mark array. A blade position detection device that detects a blade position by detecting detection marks constituting a blade, characterized in that a plurality of detection mark rows are provided complementary to each other along a traveling motion line of the blade. Device. (2) In the blade position detection device according to claim 1 of the utility model registration, each detection mark constituting the plurality of detection mark rows is detected by a single optical sensor that includes the plurality of motion lines in its field of view. A blade position detection device designed to detect. (3) The blade position detection device according to claim 1, wherein an optical sensor is provided for each of the plurality of detection mark rows.