CH557545A - OPTICAL INSTRUMENT WITH A LIQUID LEVEL. - Google Patents

OPTICAL INSTRUMENT WITH A LIQUID LEVEL.

Info

Publication number
CH557545A
CH557545A CH759273A CH759273A CH557545A CH 557545 A CH557545 A CH 557545A CH 759273 A CH759273 A CH 759273A CH 759273 A CH759273 A CH 759273A CH 557545 A CH557545 A CH 557545A
Authority
CH
Switzerland
Prior art keywords
liquid level
optical instrument
instrument
optical
liquid
Prior art date
Application number
CH759273A
Other languages
German (de)
Original Assignee
Rank Organisation 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 Rank Organisation Ltd filed Critical Rank Organisation Ltd
Publication of CH557545A publication Critical patent/CH557545A/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
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • G02B27/648—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake for automatically maintaining a reference alignment, e.g. in self-levelling surveying instruments
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Measurement Of Optical Distance (AREA)
CH759273A 1972-05-26 1973-05-25 OPTICAL INSTRUMENT WITH A LIQUID LEVEL. CH557545A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2496172 1972-05-26
GB246373A GB1394453A (en) 1972-05-26 1973-01-17 Optical instruments

Publications (1)

Publication Number Publication Date
CH557545A true CH557545A (en) 1974-12-31

Family

ID=26237534

Family Applications (1)

Application Number Title Priority Date Filing Date
CH759273A CH557545A (en) 1972-05-26 1973-05-25 OPTICAL INSTRUMENT WITH A LIQUID LEVEL.

Country Status (5)

Country Link
JP (1) JPS4951975A (en)
CH (1) CH557545A (en)
DE (1) DE2327157A1 (en)
FR (1) FR2189760B1 (en)
GB (1) GB1394453A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH673707A5 (en) * 1987-07-24 1990-03-30 Kern & Co Ag
CN106679629B (en) * 2017-01-13 2021-03-23 西南交通大学 Ruler type level meter based on grating diffraction and method for measuring inclined plane inclination angle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR874021A (en) * 1940-07-31 1942-07-27 Topographic level with automatic horizontal line of sight
US2857804A (en) * 1955-03-04 1958-10-28 Zeiss Carl Interferometer

Also Published As

Publication number Publication date
FR2189760A1 (en) 1974-01-25
JPS4951975A (en) 1974-05-20
GB1394453A (en) 1975-05-14
DE2327157A1 (en) 1973-12-06
FR2189760B1 (en) 1976-04-23

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Legal Events

Date Code Title Description
PL Patent ceased