JPS5648505A - Length measuring device - Google Patents

Length measuring device

Info

Publication number
JPS5648505A
JPS5648505A JP12663279A JP12663279A JPS5648505A JP S5648505 A JPS5648505 A JP S5648505A JP 12663279 A JP12663279 A JP 12663279A JP 12663279 A JP12663279 A JP 12663279A JP S5648505 A JPS5648505 A JP S5648505A
Authority
JP
Japan
Prior art keywords
mark
light
marking
zero
image pickup
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
JP12663279A
Other languages
Japanese (ja)
Inventor
Takashi Kobayashi
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP12663279A priority Critical patent/JPS5648505A/en
Publication of JPS5648505A publication Critical patent/JPS5648505A/en
Pending legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE: To realize an extremely high-accuracy measurement of length for the twisted line or the like, by reading the main point of the mark through the zero- cross system using the differential output between the two photoelectric transducers, projecting the light from the position right above the tangent line at the mark part and the installing the image pickup device in the vertical direction respectively.
CONSTITUTION: A marking of a sharp form is given to the travelling long-sized material 1 by the marking device 2 and with every distance nearly equivalent to the reference distance L. The marks put continuously onto the surface of the material 1 are detected by the mark detector 3, and the light is irradiated from the light source 9 through the area right above the marking part. This reflected light is put into the image pickup device 4 which is set horizontally and in a vertical direction to detect the one-preceding mark position. The fixed point of the mark formed through the lens system is read out by the two solar batteries S1 and S2 and in the zero- cross system for the detector 3. As the solar battery is covered with a cover having a slitlike aperture, the disturbance due to the diffused reflection can be avoided.
COPYRIGHT: (C)1981,JPO&Japio
JP12663279A 1979-09-28 1979-09-28 Length measuring device Pending JPS5648505A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12663279A JPS5648505A (en) 1979-09-28 1979-09-28 Length measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12663279A JPS5648505A (en) 1979-09-28 1979-09-28 Length measuring device

Publications (1)

Publication Number Publication Date
JPS5648505A true JPS5648505A (en) 1981-05-01

Family

ID=14939989

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12663279A Pending JPS5648505A (en) 1979-09-28 1979-09-28 Length measuring device

Country Status (1)

Country Link
JP (1) JPS5648505A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62115304A (en) * 1985-11-14 1987-05-27 Kanebo Ltd Joint detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62115304A (en) * 1985-11-14 1987-05-27 Kanebo Ltd Joint detector
JPH0418242B2 (en) * 1985-11-14 1992-03-27 Kanebo Ltd

Similar Documents

Publication Publication Date Title
JPS54126023A (en) Optical device
JPS561329A (en) Monolithicly molded plastic optical element
EP0094481A3 (en) Opto-electrical measuring-device
JPS55106361A (en) Optical contactless-type speed measuring device
JPS55119006A (en) Displacement measuring instrument
JPS5648505A (en) Length measuring device
JPS56148041A (en) Reflected light quantity detector
JPS5760243A (en) Measuring apparatus for fresnel lens
FR2425065A1 (en) Optical system for measuring surface reflectance properties - has optical elements aligned close to surface normal (OE 15.10.79)
JPS5648504A (en) Length measuring device
JPS5750606A (en) Solar sensor
JPS5593003A (en) Measuring method for plate thickness of plate-shape transparent body
JPS5550105A (en) Moving distance meter for movable body
JPS5342881A (en) Measuring apparatus of leaked flowing amount
JPS5572825A (en) Detecting method for liquid level position in container
JPS5324233A (en) Pattern examination system
JPS5530627A (en) Wire diameter meter
JPS54136888A (en) Surface defect detecting device
JPS5391772A (en) Measurement apparatus
JPS5316651A (en) Displacement detector
JPS5511606A (en) Photoelectric conversion device
JPS5337454A (en) Distance measuring device
JPS53107864A (en) Sag detector of linear objects
JPS57100304A (en) Angle detector
JPS56114705A (en) Gap measuring device