GB622107A - Improvements in or relating to prisms for optical instruments - Google Patents

Improvements in or relating to prisms for optical instruments

Info

Publication number
GB622107A
GB622107A GB7882/46A GB788246A GB622107A GB 622107 A GB622107 A GB 622107A GB 7882/46 A GB7882/46 A GB 7882/46A GB 788246 A GB788246 A GB 788246A GB 622107 A GB622107 A GB 622107A
Authority
GB
United Kingdom
Prior art keywords
face
light
prism
parallel
prisms
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
GB7882/46A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB622107A publication Critical patent/GB622107A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Viewfinders (AREA)

Abstract

622,107. Prisms. SORDOILLET, P. March 13, 1946, No. 7882. Convention date, March 13, 1945. [Class 97 (i)] A glass prism is inserted between the object lens 12 and the eyepiece 18 of an optical instrument, e.g. field glasses, so that the light passing through the object lens is incident normally on the face 3<SP>1</SP> of the prism. After passing through this face undeviated, the light is reflected at an inclined flat face 4 on to a surface 3<SP>2</SP>, parallel to surface 3<SP>1</SP>, and is then directed on to the silvered portion 9 of a face 2<SP>1</SP>, which is parallel to the optical axis of the instrument and which reflects the light onto the silvered portion 10 of the face 2<SP>2</SP>. Face 2<SP>2</SP> is parallel to the face 2<SP>1</SP> and reflects the light on to a roof-shaped face 6 whereby it is reflected through surface 3<SP>2</SP> on to the eyepiece 18. The light rays thus avoid the central part of the prism, which may have a central cavity 19 to reduce the weight of the prism and to allow the insertion therein of a fixing member.
GB7882/46A 1945-03-13 1946-03-13 Improvements in or relating to prisms for optical instruments Expired GB622107A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR622107X 1945-03-13

Publications (1)

Publication Number Publication Date
GB622107A true GB622107A (en) 1949-04-27

Family

ID=8985608

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7882/46A Expired GB622107A (en) 1945-03-13 1946-03-13 Improvements in or relating to prisms for optical instruments

Country Status (1)

Country Link
GB (1) GB622107A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988057A (en) * 1974-10-29 1976-10-26 Kaptron, Inc. Prism reflector for optical projector/reader

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988057A (en) * 1974-10-29 1976-10-26 Kaptron, Inc. Prism reflector for optical projector/reader

Similar Documents

Publication Publication Date Title
GB1127304A (en) Improvements in or relating to fibre-optical systems
GB1464951A (en) Compensating devices for sighting instruments notably levels
GB622107A (en) Improvements in or relating to prisms for optical instruments
GB350323A (en) Improvements in or relating to optical objectives
EP0055884A3 (en) Optical instrument for measuring the divergence of two approximately colinear optical axes
GB1499755A (en) Optical magnifiers
SU1615664A1 (en) Autocollimator eye-piece
US2393782A (en) Ocular
GB462332A (en) Improvements in refractometers
GB680167A (en) Interferometer for testing optical systems
GB778276A (en) Improvements in or relating to endoscopes
SU136935A1 (en) Sight device for objective pyrometers
GB580043A (en) Improvements in parallax measuring instruments such as rangefinders
GB810899A (en) Improvements in or relating to telescopes
JPS57198425A (en) Optical branching and coupling circuit
GB575871A (en) Improved apparatus for teaching optics
JPS57197404A (en) Measuring method of radius of curvature
GB605564A (en) Improvements in binocular observation instruments
SU78564A1 (en) Photometric prism
GB745529A (en) Artificial horizon
GB732445A (en) Improvements in or relating to optical devices for testing centering, coaxiality andalignment
GB595647A (en) Improvements in optical parallax measuring instruments having a base, such as rangefinders
GB589078A (en) Improvements in and relating to sextants and like angle-measuring instruments
GB485997A (en) Improvements in binocular viewing devices for stereophotogrammetric measuring instruments
GB574750A (en) Improved optical magnifier