GB853721A - Improvements in binocular telescopes - Google Patents

Improvements in binocular telescopes

Info

Publication number
GB853721A
GB853721A GB789/58A GB78958A GB853721A GB 853721 A GB853721 A GB 853721A GB 789/58 A GB789/58 A GB 789/58A GB 78958 A GB78958 A GB 78958A GB 853721 A GB853721 A GB 853721A
Authority
GB
United Kingdom
Prior art keywords
telescopes
lens
eyepiece
centimeters
jan
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
GB789/58A
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.)
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 GB853721A publication Critical patent/GB853721A/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
    • G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
    • G02B23/08—Periscopes

Landscapes

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

Abstract

853,721. Binocular telescopes. DE MONTREMY, J. Jan. 8, 1958 [Jan. 9, 1957], No. 789/58. Class 97(1) A binocular telescope comprises two identical parallel monocular telescopes disposed side by side and each including an objective, an eyepiece, an erector lens element therebetween and a diverging lens to locate the exit pupil at a considerable distance behind the eyepiece, at least the objectives having diameters of from 4 to 6 centimeters and the exit pupils diameters of from 3 to 5 centimeters and located behind the corresponding eyepieces at from 15 to 30 centimeters, the distance between the telescopes being equal to the average distance between the eyes of normal persons. By this arrangement location of the eyes of an observer is rendered less critical. The periscopic form shown comprises objective 1, field lens 3, erector lens 4, negative lens 5 and eyepiece 2. Numerical data are given for one example of such a system. 10, 101 indicate pellets of a substance intended to absorb moisture.
GB789/58A 1957-01-09 1958-01-08 Improvements in binocular telescopes Expired GB853721A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR853721X 1957-01-09

Publications (1)

Publication Number Publication Date
GB853721A true GB853721A (en) 1960-11-09

Family

ID=9327192

Family Applications (1)

Application Number Title Priority Date Filing Date
GB789/58A Expired GB853721A (en) 1957-01-09 1958-01-08 Improvements in binocular telescopes

Country Status (1)

Country Link
GB (1) GB853721A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4275639A (en) * 1978-10-23 1981-06-30 Fmc Corporation Periscopic sight with a unitary lens system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4275639A (en) * 1978-10-23 1981-06-30 Fmc Corporation Periscopic sight with a unitary lens system

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