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GB858171A - Improvements in and relating to optical apparatus - Google Patents

Improvements in and relating to optical apparatus

Info

Publication number
GB858171A
GB858171A GB161556A GB161556A GB858171A GB 858171 A GB858171 A GB 858171A GB 161556 A GB161556 A GB 161556A GB 161556 A GB161556 A GB 161556A GB 858171 A GB858171 A GB 858171A
Authority
GB
United Kingdom
Prior art keywords
ray
pairs
pair
beams
distance
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
GB161556A
Inventor
Kenneth Walter Brittan
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.)
NAT RES DEV
National Research Development Corp UK
Original Assignee
NAT RES DEV
National Research Development Corp UK
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 NAT RES DEV, National Research Development Corp UK filed Critical NAT RES DEV
Priority to GB161556A priority Critical patent/GB858171A/en
Publication of GB858171A publication Critical patent/GB858171A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2861—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using fibre optic delay lines and optical elements associated with them, e.g. for use in signal processing, e.g. filtering

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Astronomy & Astrophysics (AREA)
  • Instruments For Measurement Of Length By Optical Means (AREA)

Abstract

858,171. Optical apparatus. NATIONAL RESEARCH DEVELOPMENT CORPORATION. April 17, 1957 [Jan. 17, 1956], No. 1615/56. Class 97(1) A device by which the optical path of a ray or narrow beam of light may be increased to a multiple of the physical length of the device. Comprises two pairs of inwardly facing plane reflectors set with the reflecting faces of one pair facing the reflecting faces of the other pair and with the planes perpendicular to the line of intersection of each pair parallel or approximately so, the relative disposition of the pairs and the direction of entry of the ray or narrow beam being such that the ray is reflected at least six times and thus has its path increased by at least three times the distance between the pairs before escaping from the svstem. As shown in Fig. 1 the system may be formed of two isosceles rightangled prisms 11, 12 with their hypotenuse faces parallel and the planes bisecting the angle between their included surfaces being relatively displaced by a distance d, the ray r suffering twelve reflections before emergence. The device may be used in a telescope or, as in Fig. 5, adapted to a Jamin interferometer by the provision of two devices 41a, 42a and 41b, 42b disposed as shown and relatively displaced the incident beam 44 being divided by a plate 43 into beams 44a, 44b, respectively dissected by a prism 45 into the prism systems 41a, 42a and 41b, 42b. After multiple reflection the beams are combined by a plate 46 to produce interference effects.
GB161556A 1956-01-17 1956-01-17 Improvements in and relating to optical apparatus Expired GB858171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB161556A GB858171A (en) 1956-01-17 1956-01-17 Improvements in and relating to optical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB161556A GB858171A (en) 1956-01-17 1956-01-17 Improvements in and relating to optical apparatus

Publications (1)

Publication Number Publication Date
GB858171A true GB858171A (en) 1961-01-11

Family

ID=9725010

Family Applications (1)

Application Number Title Priority Date Filing Date
GB161556A Expired GB858171A (en) 1956-01-17 1956-01-17 Improvements in and relating to optical apparatus

Country Status (1)

Country Link
GB (1) GB858171A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3409343A (en) * 1965-10-23 1968-11-05 Zapp Walter Magnifying viewing device
GB2116745A (en) * 1982-03-17 1983-09-28 Magyar Optikai Muevek Level instrument with telescope
GB2253493A (en) * 1991-01-29 1992-09-09 Clark Instrumentation Inc Method and apparatus relating to an optical delay line
US5715057A (en) * 1995-06-20 1998-02-03 Carl Zeiss Jena Gmbh Reference interferometer with variable wavelength and folded measurement beam path
US7742172B2 (en) 2002-09-18 2010-06-22 Teraview Limited Apparatus for varying the path length of a beam of radiation
EP3719556A1 (en) * 2019-04-05 2020-10-07 Optos PLC Optical system, optical delay line and oct apparatus
CN113031191A (en) * 2019-12-25 2021-06-25 吉佳科技股份有限公司 Optical focusing device with shake compensation

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3409343A (en) * 1965-10-23 1968-11-05 Zapp Walter Magnifying viewing device
GB2116745A (en) * 1982-03-17 1983-09-28 Magyar Optikai Muevek Level instrument with telescope
GB2253493A (en) * 1991-01-29 1992-09-09 Clark Instrumentation Inc Method and apparatus relating to an optical delay line
US5715057A (en) * 1995-06-20 1998-02-03 Carl Zeiss Jena Gmbh Reference interferometer with variable wavelength and folded measurement beam path
US7742172B2 (en) 2002-09-18 2010-06-22 Teraview Limited Apparatus for varying the path length of a beam of radiation
EP3719556A1 (en) * 2019-04-05 2020-10-07 Optos PLC Optical system, optical delay line and oct apparatus
CN113031191A (en) * 2019-12-25 2021-06-25 吉佳科技股份有限公司 Optical focusing device with shake compensation
CN113031191B (en) * 2019-12-25 2023-06-02 吉佳科技股份有限公司 Optical focusing device with shake compensation

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