GB869617A - Improvements in and relating to optical reflection instruments - Google Patents

Improvements in and relating to optical reflection instruments

Info

Publication number
GB869617A
GB869617A GB12433/58A GB1243358A GB869617A GB 869617 A GB869617 A GB 869617A GB 12433/58 A GB12433/58 A GB 12433/58A GB 1243358 A GB1243358 A GB 1243358A GB 869617 A GB869617 A GB 869617A
Authority
GB
United Kingdom
Prior art keywords
instrument
prism
light
reflecting surface
reticule
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
Application number
GB12433/58A
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.)
MARIE PIERRE POITEVIN DE FONTGUYON
Original Assignee
MARIE PIERRE POITEVIN DE FONTGUYON
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 MARIE PIERRE POITEVIN DE FONTGUYON filed Critical MARIE PIERRE POITEVIN DE FONTGUYON
Publication of GB869617A publication Critical patent/GB869617A/en
Expired legal-status Critical Current

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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Telescopes (AREA)

Abstract

869,617. Optical reflection instrument; levels. DE FONTGUYON, M. P. P. April 18, 1958 [April 19, 1957], No. 12433/58. Classes 97(1) and 97(2) An optical device with a reflecting surface, for attachment to an optical observation instrument comprises, in the path of the light beam, a deformable transparent medium forming a prism of variable angle, one face of which is bounded in part by the instrument, said prism consisting of a material of a predetermined refractive index so that variation of angle between the emergent beam and the reflecting surface caused by angular displacements of the instrument relative to the reflecting surface may be amplified, reduced or cancelled as desired. In the automatic level shown in Fig. 2 an image of a reticule 38 is formed in the principal plane 37 of the objective eye-piece system 35, 36. Light from the reticule 38 passes through a deformable prism formed by a fluid 32 and bounded by a reflecting mercury bath 30 at which the light is reflected and a plate 31. The instrument can be reduced in size by having the surface of the plate 31 (64) which bounds the prism bent as at 68, 69 in Fig. 6. In another embodiment (Fig. 7, not shown) the size of the instrument is decreased by placing multiple additional transparent media in the light path.
GB12433/58A 1957-04-19 1958-04-18 Improvements in and relating to optical reflection instruments Expired GB869617A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR869617X 1957-04-19

Publications (1)

Publication Number Publication Date
GB869617A true GB869617A (en) 1961-05-31

Family

ID=9346556

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12433/58A Expired GB869617A (en) 1957-04-19 1958-04-18 Improvements in and relating to optical reflection instruments

Country Status (1)

Country Link
GB (1) GB869617A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3475073A (en) * 1966-11-07 1969-10-28 Optical Res & Dev Corp Accidental-motion compensation by triple reflection
US3583814A (en) * 1968-12-18 1971-06-08 Shumway Optical Instr Corp Optical level

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3475073A (en) * 1966-11-07 1969-10-28 Optical Res & Dev Corp Accidental-motion compensation by triple reflection
US3583814A (en) * 1968-12-18 1971-06-08 Shumway Optical Instr Corp Optical level

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