[go: up one dir, main page]

JPS5612629A - Blade for exposure control - Google Patents

Blade for exposure control

Info

Publication number
JPS5612629A
JPS5612629A JP8911779A JP8911779A JPS5612629A JP S5612629 A JPS5612629 A JP S5612629A JP 8911779 A JP8911779 A JP 8911779A JP 8911779 A JP8911779 A JP 8911779A JP S5612629 A JPS5612629 A JP S5612629A
Authority
JP
Japan
Prior art keywords
blade
exposure control
edge
barrel
lens
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
JP8911779A
Other languages
Japanese (ja)
Inventor
Akiyasu Washimi
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 JP8911779A priority Critical patent/JPS5612629A/en
Publication of JPS5612629A publication Critical patent/JPS5612629A/en
Pending legal-status Critical Current

Links

Landscapes

  • Diaphragms For Cameras (AREA)
  • Shutters For Cameras (AREA)

Abstract

PURPOSE: To prevent the transmimitted and reflected light from a blade edge and obtain a lens-barrel of good performance by providing a tapered part on the end face of the blade for exposure control within the optical path of a photographing device.
CONSTITUTION: A blade 3 for exposure control is continuously formed to the blade 3 provided with a knife-edge 3a by blanking, chamfering, finishing and cutting of a thin metal plate. This eliminates the transmission and reflection from the blade edge 3a, makes possible the formation of an ideal aperture part and a shutter part, and nevertheless enebles the lens-barrel of prices equal to those of conventional ones and good performance to be obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP8911779A 1979-07-13 1979-07-13 Blade for exposure control Pending JPS5612629A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8911779A JPS5612629A (en) 1979-07-13 1979-07-13 Blade for exposure control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8911779A JPS5612629A (en) 1979-07-13 1979-07-13 Blade for exposure control

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP19507785A Division JPS6175328A (en) 1985-09-03 1985-09-03 Manufacture of blade for exposure control

Publications (1)

Publication Number Publication Date
JPS5612629A true JPS5612629A (en) 1981-02-07

Family

ID=13961941

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8911779A Pending JPS5612629A (en) 1979-07-13 1979-07-13 Blade for exposure control

Country Status (1)

Country Link
JP (1) JPS5612629A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6984078B2 (en) 2002-10-18 2006-01-10 Tamron Co., Ltd. Aperture diaphragm, imaging device, and method of manufacturing the aperture diaphragm
JP2007178823A (en) * 2005-12-28 2007-07-12 Canon Electronics Inc Optical member
JP2009079389A (en) * 2007-09-25 2009-04-16 Panasonic Electric Works Co Ltd Rainwater intake device
JP2011170391A (en) * 2011-06-08 2011-09-01 Canon Electronics Inc Optical member
JP2013222154A (en) * 2012-04-18 2013-10-28 Nisca Corp Diaphragm feather, light quantity adjustment apparatus, optical equipment and manufacturing method of diaphragm feather

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6984078B2 (en) 2002-10-18 2006-01-10 Tamron Co., Ltd. Aperture diaphragm, imaging device, and method of manufacturing the aperture diaphragm
JP2007178823A (en) * 2005-12-28 2007-07-12 Canon Electronics Inc Optical member
JP2009079389A (en) * 2007-09-25 2009-04-16 Panasonic Electric Works Co Ltd Rainwater intake device
JP2011170391A (en) * 2011-06-08 2011-09-01 Canon Electronics Inc Optical member
JP2013222154A (en) * 2012-04-18 2013-10-28 Nisca Corp Diaphragm feather, light quantity adjustment apparatus, optical equipment and manufacturing method of diaphragm feather
US8764321B2 (en) 2012-04-18 2014-07-01 Nisca Corporation Restricting blade, light quantity adjusting device, optical apparatus, and method for manufacturing restricting blade

Similar Documents

Publication Publication Date Title
JPS55155330A (en) Semiautomatic focus adjuster
JPS5612629A (en) Blade for exposure control
JPS5789731A (en) Focusing screen
JPS5342025A (en) Exposure indicator for single lens reflec camera of automatic exposure control type
JPS54126050A (en) Focusing method preventing variation of angle of view
JPS5652710A (en) Mark finder for camera
JPS51149004A (en) Optical apparatus
JPS5282264A (en) Range finder
JPS55166632A (en) Finder for single-lens reflex camera
JPS55164818A (en) Camera having split type focal plane shutter
JPS57132112A (en) Gaussian photographic lens
SE8500893D0 (en) MULTIPLE FUNCTION CAMERA
JPS5447632A (en) Camera for photographing data
JPS57161843A (en) Focusing glass
JPS5538520A (en) Reflection-refraction type telephoto lens
JPS54134424A (en) Automatic focusing device for single lens reflex camera
JPS54106206A (en) Optical recorder
JPS5479626A (en) Three-clolor separation optical device for color television camera
JPS52111736A (en) Scanning optical system with information beam take-out element
JPS5449153A (en) Light attenuator
JPS5627119A (en) Finder device of single lens reflex camera
JPS5617328A (en) Single-lens reflex camera
JPS55154609A (en) Automatic running control unit for construction machine
JPS556350A (en) Finder optical system of camera provided with automatic focus detector
JPS55108613A (en) Optical low-pass filter