JPS5654429A - Measuring device of dynamic characteristic of diaphragm mechanism of interchangeable lens - Google Patents

Measuring device of dynamic characteristic of diaphragm mechanism of interchangeable lens

Info

Publication number
JPS5654429A
JPS5654429A JP13113179A JP13113179A JPS5654429A JP S5654429 A JPS5654429 A JP S5654429A JP 13113179 A JP13113179 A JP 13113179A JP 13113179 A JP13113179 A JP 13113179A JP S5654429 A JPS5654429 A JP S5654429A
Authority
JP
Japan
Prior art keywords
lever
pin
weight
interchangeable lens
detained
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13113179A
Other languages
Japanese (ja)
Inventor
Toshio Iwafune
Ichiro Okumura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP13113179A priority Critical patent/JPS5654429A/en
Publication of JPS5654429A publication Critical patent/JPS5654429A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To make possible easy and accurate characteristic measurement with simple constitution by measuring even the friction torque of a freely turnable measuring lever by means of the negative load moving force applied at one end and the interchangeable lens presetting force applied at the other end.
CONSTITUTION: When a pin 6 is temporarily withdrawn by way of a solenoid 9, it is turned clockwise by a weight 2, and a lever 3 which is energized with the counterclockwise driving force by the spring 10 of a disphragm ring 4 of an intergengeable lens abutting on the other end stops because the lever 8 in one piece with said lever abuts on the outer side of the pin 6 and is thereby detained. Thence, when the pins 6, 7 are withdrawn, the lever 3 turns counterclockwise and the rotating speed of the lever 3 corresponding to the diaphragm mechanism characteristics is measured by means of a slit plate 5 and photocouplers 11, 12. On the other hand, the weight of a weight 2 is so adjusted that the friction torque by the turning speed detection becomes constant, by turning the lever 3 clockwise from the state that it is detained by the outer side of the pin 7 and is held stopped, in the state that the ring 4 is not engaged.
COPYRIGHT: (C)1981,JPO&Japio
JP13113179A 1979-10-11 1979-10-11 Measuring device of dynamic characteristic of diaphragm mechanism of interchangeable lens Pending JPS5654429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13113179A JPS5654429A (en) 1979-10-11 1979-10-11 Measuring device of dynamic characteristic of diaphragm mechanism of interchangeable lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13113179A JPS5654429A (en) 1979-10-11 1979-10-11 Measuring device of dynamic characteristic of diaphragm mechanism of interchangeable lens

Publications (1)

Publication Number Publication Date
JPS5654429A true JPS5654429A (en) 1981-05-14

Family

ID=15050701

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13113179A Pending JPS5654429A (en) 1979-10-11 1979-10-11 Measuring device of dynamic characteristic of diaphragm mechanism of interchangeable lens

Country Status (1)

Country Link
JP (1) JPS5654429A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6294661A (en) * 1985-10-21 1987-05-01 株式会社　坂戸工作所 Method and apparatus for disassembling chimney
JP2007316041A (en) * 2006-05-23 2007-12-06 Sakata Denki Liquid level position detector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6294661A (en) * 1985-10-21 1987-05-01 株式会社　坂戸工作所 Method and apparatus for disassembling chimney
JPH0463946B2 (en) * 1985-10-21 1992-10-13 Sakato Kosakusho Kk
JP2007316041A (en) * 2006-05-23 2007-12-06 Sakata Denki Liquid level position detector

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