US2119543A - Prism - Google Patents

Prism Download PDF

Info

Publication number
US2119543A
US2119543A US132354A US13235437A US2119543A US 2119543 A US2119543 A US 2119543A US 132354 A US132354 A US 132354A US 13235437 A US13235437 A US 13235437A US 2119543 A US2119543 A US 2119543A
Authority
US
United States
Prior art keywords
face
prism
angle
rays
reflecting
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 - Lifetime
Application number
US132354A
Inventor
Otto K Kaspereit
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
Priority to US132354A priority Critical patent/US2119543A/en
Application granted granted Critical
Publication of US2119543A publication Critical patent/US2119543A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms

Definitions

  • This invention relates to a prism.
  • the purpose of the invention is to provide a one-piece prism designed to deviate the line of sight through an angle of 90 in the horizontal plane and through an angle of 60 in the vetrical plane and to invert and revert the image.
  • Fig. 1 is a plan view.
  • Fig. 2 is a view in rear elevation.
  • Fig. 3 is an end view.
  • angles alpha are equal to 60 and the angle beta is equal to 45.
  • the prisms consist of a single block having parallel front and rear faces respectively 5 and 6. Only a portion of the front face is employed as an entrant face 5 and opposite this portion is a reflecting face 1 making an angle of 45 therewith.
  • the left end portion of the prism therefor constitutes a right-angle reflecting prism whose bottom face 8 is disposed horizontally.
  • the prism has an inclined reflecting face 9 disposed in the path of the rays reflected by the face 1 and at an angle of 60 to the vertical line of the prism as indicated by the angle of alpha in Fig. 2.
  • the right end of the prism forms an emergent face ll! at an angle of 60 to the reflecting face 9 and perpendicular to the path of rays reflected by the face 9.
  • the upper face ll of the prism is a plane continuous surface.
  • the rays of light entering the prism at the face 5 are deviated by the reflecting face 1 through an angle of 90 in the horizontal plane and are directed onto the face 9 which deviates them through an angle of 60 in the vertical plane.
  • a single prism for inverting and reverting an image embodying an entrant face for rays of light a first reflecting face disposed at an angle of to the entrant face for deviating the rays of light through 90 a second reflecting face making an angle of with a plane perpendicular to the path of the rays deviated by the first reflecting face and receiving the rays of light from the first reflecting face and deviating them through an angle of 60 to the plane perpendicular to the path of the reflected rays and an emergent face making an angle of 60 with the second reflecting face.

Description

UFICH bl! HUUIH June 7, 1 938.
0. K. KASPEREIT PRISM Filed March 22, 1937 c vlall BYIIE.
Inventor Elttcl K- 5pereit Hy M/EWK Attnr-ne Patented June 7, 1938 UNITED STATES PATENT OFFICE 1 Claim.
(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 O. G. 757) The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.
This invention relates to a prism.
The purpose of the invention is to provide a one-piece prism designed to deviate the line of sight through an angle of 90 in the horizontal plane and through an angle of 60 in the vetrical plane and to invert and revert the image.
A practical embodiment of the invention is illustrated in the accompanying drawing, in which,
Fig. 1 is a plan view.
Fig. 2 is a view in rear elevation.
Fig. 3 is an end view.
Referring to the drawing by characters of reference, the angles alpha are equal to 60 and the angle beta is equal to 45.
The prisms consist of a single block having parallel front and rear faces respectively 5 and 6. Only a portion of the front face is employed as an entrant face 5 and opposite this portion is a reflecting face 1 making an angle of 45 therewith. The left end portion of the prism therefor constitutes a right-angle reflecting prism whose bottom face 8 is disposed horizontally. The prism has an inclined reflecting face 9 disposed in the path of the rays reflected by the face 1 and at an angle of 60 to the vertical line of the prism as indicated by the angle of alpha in Fig. 2. The right end of the prism forms an emergent face ll! at an angle of 60 to the reflecting face 9 and perpendicular to the path of rays reflected by the face 9. The upper face ll of the prism is a plane continuous surface.
The rays of light entering the prism at the face 5 are deviated by the reflecting face 1 through an angle of 90 in the horizontal plane and are directed onto the face 9 which deviates them through an angle of 60 in the vertical plane. An inspection of the horizontal rays a, b, c, and the vertical rays a, d, e, shows that the image will appear inverted and reverted in the emergent face I0.
I claim:
A single prism for inverting and reverting an image embodying an entrant face for rays of light. a first reflecting face disposed at an angle of to the entrant face for deviating the rays of light through 90 a second reflecting face making an angle of with a plane perpendicular to the path of the rays deviated by the first reflecting face and receiving the rays of light from the first reflecting face and deviating them through an angle of 60 to the plane perpendicular to the path of the reflected rays and an emergent face making an angle of 60 with the second reflecting face.
O'ITO K. KASPEREIT.
US132354A 1937-03-22 1937-03-22 Prism Expired - Lifetime US2119543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US132354A US2119543A (en) 1937-03-22 1937-03-22 Prism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US132354A US2119543A (en) 1937-03-22 1937-03-22 Prism

Publications (1)

Publication Number Publication Date
US2119543A true US2119543A (en) 1938-06-07

Family

ID=22453632

Family Applications (1)

Application Number Title Priority Date Filing Date
US132354A Expired - Lifetime US2119543A (en) 1937-03-22 1937-03-22 Prism

Country Status (1)

Country Link
US (1) US2119543A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044344A (en) * 1960-04-15 1962-07-17 Joel T Hartmeister Range finding device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044344A (en) * 1960-04-15 1962-07-17 Joel T Hartmeister Range finding device

Similar Documents

Publication Publication Date Title
GB1412822A (en) Polarization device
US1404004A (en) Searchlight window
US2119542A (en) Prism
US2119543A (en) Prism
GB425552A (en) Improvements relating to the decomposition and composition of pictures particularly in television
US2119544A (en) Prism
US2119545A (en) Prism
US1358413A (en) Polarizing-prism
US2173106A (en) Periscope
US2251177A (en) Optical system for photography and projection
US2085026A (en) Prism
US2360768A (en) Gun sight
US2085025A (en) Reflecting prism
GB1406569A (en) Liquid crystal digital reticle
GB416509A (en) Means for controlling undesired reflections in optical apparatus
GB271963A (en) Improvements in or relating to cameras and like optical projection devices
GB619360A (en) Improvements in or relating to semi-transparent reflectors
GB1340347A (en) Optical system
GB1412939A (en) Optical viewing systems
GB398647A (en) Optical reflecting device
GB251027A (en) Improvements in and relating to optical systems for three-colour photographic cameras
US2740319A (en) Interferometer for wind tunnels
GB503222A (en) Improvements in light-dividing prism systems for colour photography or the like
US1459864A (en) Erecting prism for telescopes and other optical instruments
SU61498A1 (en) Compensation difference switch for interference devices