JPS6488313A - Optical encoder - Google Patents

Optical encoder

Info

Publication number
JPS6488313A
JPS6488313A JP62246726A JP24672687A JPS6488313A JP S6488313 A JPS6488313 A JP S6488313A JP 62246726 A JP62246726 A JP 62246726A JP 24672687 A JP24672687 A JP 24672687A JP S6488313 A JPS6488313 A JP S6488313A
Authority
JP
Japan
Prior art keywords
scale
varies
opening rate
ratio
track
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
JP62246726A
Other languages
English (en)
Japanese (ja)
Other versions
JPH054615B2 (enrdf_load_stackoverflow
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.)
Okuma Corp
Original Assignee
Okuma Machinery Works 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 Okuma Machinery Works Ltd filed Critical Okuma Machinery Works Ltd
Priority to JP62246726A priority Critical patent/JPS6488313A/ja
Priority to DE3833115A priority patent/DE3833115A1/de
Priority to DE3844705A priority patent/DE3844705C2/de
Priority to GB8823120A priority patent/GB2210525B/en
Priority to DE3844704A priority patent/DE3844704C2/de
Priority to US07/251,089 priority patent/US4950891A/en
Publication of JPS6488313A publication Critical patent/JPS6488313A/ja
Priority to US07/374,922 priority patent/US4956553A/en
Priority to US07/374,918 priority patent/US4948968A/en
Publication of JPH054615B2 publication Critical patent/JPH054615B2/ja
Granted legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Optical Transform (AREA)
JP62246726A 1987-09-30 1987-09-30 Optical encoder Granted JPS6488313A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP62246726A JPS6488313A (en) 1987-09-30 1987-09-30 Optical encoder
DE3833115A DE3833115A1 (de) 1987-09-30 1988-09-29 Optischer codierer
DE3844705A DE3844705C2 (enrdf_load_stackoverflow) 1987-09-30 1988-09-29
GB8823120A GB2210525B (en) 1987-09-30 1988-09-29 Optical encoder
DE3844704A DE3844704C2 (enrdf_load_stackoverflow) 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
US07/374,922 US4956553A (en) 1987-09-30 1989-07-03 Optical encoder with varying grating pitch
US07/374,918 US4948968A (en) 1987-09-30 1989-07-03 High resolution optical encoder having a long detection stroke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62246726A JPS6488313A (en) 1987-09-30 1987-09-30 Optical encoder

Publications (2)

Publication Number Publication Date
JPS6488313A true JPS6488313A (en) 1989-04-03
JPH054615B2 JPH054615B2 (enrdf_load_stackoverflow) 1993-01-20

Family

ID=17152731

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62246726A Granted JPS6488313A (en) 1987-09-30 1987-09-30 Optical encoder

Country Status (1)

Country Link
JP (1) JPS6488313A (enrdf_load_stackoverflow)

Cited By (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

Cited By (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
JPH054615B2 (enrdf_load_stackoverflow) 1993-01-20

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