NL182985B - DEVICE FOR MEASURING MOVEMENTS USING TWO MOVABLE GRILLES. - Google Patents

DEVICE FOR MEASURING MOVEMENTS USING TWO MOVABLE GRILLES.

Info

Publication number
NL182985B
NL182985B NL7505650A NL7505650A NL182985B NL 182985 B NL182985 B NL 182985B NL 7505650 A NL7505650 A NL 7505650A NL 7505650 A NL7505650 A NL 7505650A NL 182985 B NL182985 B NL 182985B
Authority
NL
Netherlands
Prior art keywords
measuring movements
movable grilles
grilles
movable
movements
Prior art date
Application number
NL7505650A
Other languages
Dutch (nl)
Other versions
NL182985C (en
NL7505650A (en
Original Assignee
Leitz Ernst Gmbh
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 Leitz Ernst Gmbh filed Critical Leitz Ernst Gmbh
Publication of NL7505650A publication Critical patent/NL7505650A/en
Publication of NL182985B publication Critical patent/NL182985B/en
Application granted granted Critical
Publication of NL182985C publication Critical patent/NL182985C/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/4233—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive element [DOE] contributing to a non-imaging application
    • G02B27/4255—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive element [DOE] contributing to a non-imaging application for alignment or positioning purposes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Instruments For Measurement Of Length By Optical Means (AREA)
  • Optical Transform (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
NL7505650A 1974-06-06 1975-05-14 DEVICE FOR MEASURING MOVEMENTS USING TWO MOVABLE GRILLES. NL182985C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742427236 DE2427236C2 (en) 1974-06-06 1974-06-06 Diffraction of interfering light

Publications (3)

Publication Number Publication Date
NL7505650A NL7505650A (en) 1975-12-09
NL182985B true NL182985B (en) 1988-01-18
NL182985C NL182985C (en) 1988-06-16

Family

ID=5917422

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7505650A NL182985C (en) 1974-06-06 1975-05-14 DEVICE FOR MEASURING MOVEMENTS USING TWO MOVABLE GRILLES.

Country Status (6)

Country Link
JP (1) JPS5826002B2 (en)
CH (1) CH606988A5 (en)
DE (1) DE2427236C2 (en)
FR (1) FR2274056A1 (en)
GB (1) GB1504001A (en)
NL (1) NL182985C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE421568B (en) * 1980-05-28 1982-01-04 Optisk Forskning Inst DEVICE FOR DIVIDING A LIGHT BREAD INTO A MULTIPLE RADIATION OR vice versa
US4584484A (en) * 1983-10-03 1986-04-22 Hutchin Richard A Microscope for producing high resolution images without precision optics

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2003492A1 (en) * 1970-01-27 1971-08-12 Leitz Ernst Gmbh Measuring method for step encoders for measuring lengths or angles as well as arrangements for carrying out this measuring method
US3768911A (en) * 1971-08-17 1973-10-30 Keuffel & Esser Co Electro-optical incremental motion and position indicator

Also Published As

Publication number Publication date
DE2427236A1 (en) 1975-12-18
GB1504001A (en) 1978-03-15
JPS517945A (en) 1976-01-22
FR2274056B3 (en) 1978-12-29
DE2427236C2 (en) 1985-09-05
JPS5826002B2 (en) 1983-05-31
NL182985C (en) 1988-06-16
CH606988A5 (en) 1978-11-30
NL7505650A (en) 1975-12-09
FR2274056A1 (en) 1976-01-02

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Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
A85 Still pending on 85-01-01
TNT Modifications of names of proprietors of patents or applicants of examined patent applications

Owner name: ERNST LEITZ WETZLAR GMBH

V1 Lapsed because of non-payment of the annual fee