JPS5646219A - Optical device of variable magnification - Google Patents

Optical device of variable magnification

Info

Publication number
JPS5646219A
JPS5646219A JP12181879A JP12181879A JPS5646219A JP S5646219 A JPS5646219 A JP S5646219A JP 12181879 A JP12181879 A JP 12181879A JP 12181879 A JP12181879 A JP 12181879A JP S5646219 A JPS5646219 A JP S5646219A
Authority
JP
Japan
Prior art keywords
disk
projection
projection lens
lenses
point symmetry
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.)
Granted
Application number
JP12181879A
Other languages
Japanese (ja)
Other versions
JPS5847682B2 (en
Inventor
Ikuo Mori
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.)
Tokyo Optical Co Ltd
Original Assignee
Tokyo Optical Co Ltd
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 Tokyo Optical Co Ltd filed Critical Tokyo Optical Co Ltd
Priority to JP12181879A priority Critical patent/JPS5847682B2/en
Publication of JPS5646219A publication Critical patent/JPS5646219A/en
Publication of JPS5847682B2 publication Critical patent/JPS5847682B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Lens Barrels (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Lenses (AREA)

Abstract

PURPOSE:To obtain an optical device of variable magnificaion that is easily operated and durable and further provides smooth operation, by varying the magnification by rotating a reversibly usable projection lens around a center position of point symmetry before or after the displacement of the projection lens by about 180 deg.. CONSTITUTION:Projection lenses 1 and 1' show states before and after a change in magnification and projection lens 1 is at about 180 deg. to projection lens 1'. Then, lens 1 is fitted to disk is rotary motion around centers of point symmetry of lenses 1 and 1'. Photographic paper is supplied onto the face that includes image points 4 and 4' of object point 3 off the optical axis. Then, disk 5 is pivoted on center 6 of point symmetry of main body 10 and teeth 7 of gear 9 are provided to its outer circumference. Motor 8 is engaged with disk 5 via gear 9. Adjustment screw 11 fitted in main body 10 is engaged with projection 12 of disk 5 to make fine adjustments of positions and directions of projection lenses 1 and 1'. Because of this constitution, the structure is simple and its operation is pivot motion, providing smoothness.
JP12181879A 1979-09-21 1979-09-21 variable magnification optical device Expired JPS5847682B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12181879A JPS5847682B2 (en) 1979-09-21 1979-09-21 variable magnification optical device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12181879A JPS5847682B2 (en) 1979-09-21 1979-09-21 variable magnification optical device

Publications (2)

Publication Number Publication Date
JPS5646219A true JPS5646219A (en) 1981-04-27
JPS5847682B2 JPS5847682B2 (en) 1983-10-24

Family

ID=14820684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12181879A Expired JPS5847682B2 (en) 1979-09-21 1979-09-21 variable magnification optical device

Country Status (1)

Country Link
JP (1) JPS5847682B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6097316A (en) * 1983-10-31 1985-05-31 Mita Ind Co Ltd Variable power optical system and power varying method using this system
JPS62150213A (en) * 1985-12-24 1987-07-04 Asahi Optical Co Ltd Photographing lens mechanism
JPS63138331A (en) * 1986-12-01 1988-06-10 Fuji Photo Film Co Ltd Mask device for photographic printing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6097316A (en) * 1983-10-31 1985-05-31 Mita Ind Co Ltd Variable power optical system and power varying method using this system
JPS62150213A (en) * 1985-12-24 1987-07-04 Asahi Optical Co Ltd Photographing lens mechanism
JPS63138331A (en) * 1986-12-01 1988-06-10 Fuji Photo Film Co Ltd Mask device for photographic printing

Also Published As

Publication number Publication date
JPS5847682B2 (en) 1983-10-24

Similar Documents

Publication Publication Date Title
JPS54143629A (en) Copying apparatus having opticlal system for high speed copying
JPS5646219A (en) Optical device of variable magnification
JPS5521052A (en) Variable power copying machine
US3151205A (en) Viewing instruments with rotatably adjustable optical elements
US2988974A (en) Control devices for optical objectives of variable focal length
JPS55120006A (en) Focus adjsutment operating force balance mechanism in photographic lens
JPS5662469A (en) Adjusting mechanism for optical image read-in element
US2912914A (en) Photographic shutter and diaphragm adjusting mechanism
JPS6131286Y2 (en)
JPS541045A (en) Rotary type optical guide switching device
JPS6480935A (en) Zoom lens barrel
JPS559532A (en) Position adjuster of cylindrical lens
GB909038A (en) Improvements relating to the counting of the number of markings on the surface of a member
GB2001431A (en) Torsion meter
JP2573219Y2 (en) Camera focusing mechanism
US2926588A (en) Depth of field indicator for photographic cameras
JPS6048036A (en) Optical device of copying machine
JPH023003A (en) Focusing mechanism for lens-barrel of lens
JPS569711A (en) Zoom control mechanism of binoculars
JPS568168A (en) Position adjusting device of optical system in copying machine
JPH01321415A (en) Estimated photographic distance setting device for lens barrel
JPS57173861A (en) Lens moving device of copier
JPS5528063A (en) Observation device in reflecting telescope
JPS6180211A (en) Zooming mechanism of zoom lens
JPS5652775A (en) Magnification changing device for copying machine