JPS5550201A - Lens driving device - Google Patents

Lens driving device

Info

Publication number
JPS5550201A
JPS5550201A JP12364378A JP12364378A JPS5550201A JP S5550201 A JPS5550201 A JP S5550201A JP 12364378 A JP12364378 A JP 12364378A JP 12364378 A JP12364378 A JP 12364378A JP S5550201 A JPS5550201 A JP S5550201A
Authority
JP
Japan
Prior art keywords
speed command
lens
movement
lens driving
speed
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
JP12364378A
Other languages
Japanese (ja)
Other versions
JPS6129481B2 (en
Inventor
Takashi Onuma
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 JP12364378A priority Critical patent/JPS5550201A/en
Publication of JPS5550201A publication Critical patent/JPS5550201A/en
Publication of JPS6129481B2 publication Critical patent/JPS6129481B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Lens Barrels (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE: To let the relations between the movement quantity and focal length of the lens or the subject distance become directly proportional by modulating a fixed speed command signal by the driving position of the lens thereby changing the speed command.
CONSTITUTION: In the lens driving device which is so arranged that the movement of the lens is defined by a lens driving member and that the lens driving member is made rotation-drivable by a servo motor based on speed command signal, a servo motor 12 is not driven at a fixed speed and its moving speed is increased at the wide end to increase the movement quantity per unit time and conversely its moving speed is lowered to decrease the movement quantity per unit time on the telephoto side by forming the speed command output MSI having focal length-moving speed characteristics with a speed command control circuit 15 and modulating the fixed speed command signal SI by the position detection signal. Thereby, the image plane may be changed by natural movement.
COPYRIGHT: (C)1980,JPO&Japio
JP12364378A 1978-10-09 1978-10-09 Lens driving device Granted JPS5550201A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12364378A JPS5550201A (en) 1978-10-09 1978-10-09 Lens driving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12364378A JPS5550201A (en) 1978-10-09 1978-10-09 Lens driving device

Publications (2)

Publication Number Publication Date
JPS5550201A true JPS5550201A (en) 1980-04-11
JPS6129481B2 JPS6129481B2 (en) 1986-07-07

Family

ID=14865663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12364378A Granted JPS5550201A (en) 1978-10-09 1978-10-09 Lens driving device

Country Status (1)

Country Link
JP (1) JPS5550201A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59192214A (en) * 1983-04-15 1984-10-31 Matsushita Electric Ind Co Ltd Lens moving device
JPS60108814A (en) * 1983-11-18 1985-06-14 Matsushita Electric Ind Co Ltd lens moving device
JPS63167336A (en) * 1986-12-27 1988-07-11 Victor Co Of Japan Ltd Zooming system
JPH02163712A (en) * 1988-12-16 1990-06-25 Matsushita Electric Ind Co Ltd Zoom lens system and zoom drive method
WO2012148354A1 (en) * 2011-04-29 2012-11-01 Razer (Asia-Pacific) Pte Ltd A cam mechanism

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5020721A (en) * 1973-06-21 1975-03-05
JPS50140119A (en) * 1974-04-30 1975-11-10

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5020721A (en) * 1973-06-21 1975-03-05
JPS50140119A (en) * 1974-04-30 1975-11-10

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59192214A (en) * 1983-04-15 1984-10-31 Matsushita Electric Ind Co Ltd Lens moving device
JPS60108814A (en) * 1983-11-18 1985-06-14 Matsushita Electric Ind Co Ltd lens moving device
JPS63167336A (en) * 1986-12-27 1988-07-11 Victor Co Of Japan Ltd Zooming system
JPH02163712A (en) * 1988-12-16 1990-06-25 Matsushita Electric Ind Co Ltd Zoom lens system and zoom drive method
WO2012148354A1 (en) * 2011-04-29 2012-11-01 Razer (Asia-Pacific) Pte Ltd A cam mechanism
CN103597251A (en) * 2011-04-29 2014-02-19 雷蛇(亚太)私人有限公司 A cam mechanism
US20140174249A1 (en) * 2011-04-29 2014-06-26 Ming Li Cam Mechanism
US9388887B2 (en) * 2011-04-29 2016-07-12 Razer (Asia-Pacific) Pte Ltd. Cam mechanism
TWI547656B (en) * 2011-04-29 2016-09-01 雷蛇（亞太）私人有限公司 A cam mechanism

Also Published As

Publication number Publication date
JPS6129481B2 (en) 1986-07-07

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