JPH05646B2 - - Google Patents

Info

Publication number
JPH05646B2
JPH05646B2 JP24672787A JP24672787A JPH05646B2 JP H05646 B2 JPH05646 B2 JP H05646B2 JP 24672787 A JP24672787 A JP 24672787A JP 24672787 A JP24672787 A JP 24672787A JP H05646 B2 JPH05646 B2 JP H05646B2
Authority
JP
Japan
Prior art keywords
light
scale
spot position
light source
position detection
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.)
Expired - Lifetime
Application number
JP24672787A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6488314A (en
Inventor
Keiji Matsui
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.)
OOKUMA KK
Original Assignee
OOKUMA KK
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 OOKUMA KK filed Critical OOKUMA KK
Priority to JP24672787A priority Critical patent/JPS6488314A/ja
Priority to DE3833115A priority patent/DE3833115A1/de
Priority to GB8823120A priority patent/GB2210525B/en
Priority to DE3844705A priority patent/DE3844705C2/de
Priority to DE3844704A priority patent/DE3844704C2/de
Priority to US07/251,089 priority patent/US4950891A/en
Publication of JPS6488314A publication Critical patent/JPS6488314A/ja
Priority to US07/374,918 priority patent/US4948968A/en
Priority to US07/374,922 priority patent/US4956553A/en
Publication of JPH05646B2 publication Critical patent/JPH05646B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Optical Transform (AREA)
JP24672787A 1987-09-30 1987-09-30 Optical encoder Granted JPS6488314A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP24672787A JPS6488314A (en) 1987-09-30 1987-09-30 Optical encoder
DE3833115A DE3833115A1 (de) 1987-09-30 1988-09-29 Optischer codierer
GB8823120A GB2210525B (en) 1987-09-30 1988-09-29 Optical encoder
DE3844705A DE3844705C2 (cs) 1987-09-30 1988-09-29
DE3844704A DE3844704C2 (cs) 1987-09-30 1988-09-29
US07/251,089 US4950891A (en) 1987-09-30 1988-09-29 High resolution optical encoder having a long detection stroke
US07/374,918 US4948968A (en) 1987-09-30 1989-07-03 High resolution optical encoder having a long detection stroke
US07/374,922 US4956553A (en) 1987-09-30 1989-07-03 Optical encoder with varying grating pitch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24672787A JPS6488314A (en) 1987-09-30 1987-09-30 Optical encoder

Publications (2)

Publication Number Publication Date
JPS6488314A JPS6488314A (en) 1989-04-03
JPH05646B2 true JPH05646B2 (cs) 1993-01-06

Family

ID=17152747

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24672787A Granted JPS6488314A (en) 1987-09-30 1987-09-30 Optical encoder

Country Status (1)

Country Link
JP (1) JPS6488314A (cs)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5652426A (en) * 1993-04-19 1997-07-29 Ricoh Company, Ltd. Optical encoder having high resolution

Also Published As

Publication number Publication date
JPS6488314A (en) 1989-04-03

Similar Documents

Publication Publication Date Title
US4956553A (en) Optical encoder with varying grating pitch
US5260568A (en) Absolute position detector with diffraction grating windows and spot position detection
EP0679870B1 (en) Optical displacement sensor
US6617572B2 (en) Displacement information detection apparatus
CN103759749B (zh) 一种单码道绝对式位置编码器
SU1450761A3 (ru) Устройство дл измерени относительных перемещений двух объектов
US4933673A (en) Encoder
JPH0697171B2 (ja) 変位測定装置
RU2471289C1 (ru) Оптический кодер
JPH0131127B2 (cs)
JPH0132450B2 (cs)
US5825023A (en) Auto focus laser encoder having three light beams and a reflective grating
JP2560513B2 (ja) 回析干渉型エンコーダ
US7808649B2 (en) Fixed-point detector and displacement-measuring apparatus
JPH05647B2 (cs)
JPH05646B2 (cs)
JPH06174424A (ja) 測長または測角装置
JPH07151566A (ja) 測長または測角装置
JPH07280591A (ja) 光学式エンコーダ
JP2503561B2 (ja) レ―ザ―干渉式エンコ―ダ
JP2575931B2 (ja) 絶対位置エンコーダ
JPH054615B2 (cs)
JPH0810145B2 (ja) 光学式エンコーダ及びその光学スケール
JP2670457B2 (ja) 零点位置検出装置
KR100555875B1 (ko) 인코더 조립체