GB557491A - Improvements in or relating to range finders - Google Patents

Improvements in or relating to range finders

Info

Publication number
GB557491A
GB557491A GB6814/42A GB681442A GB557491A GB 557491 A GB557491 A GB 557491A GB 6814/42 A GB6814/42 A GB 6814/42A GB 681442 A GB681442 A GB 681442A GB 557491 A GB557491 A GB 557491A
Authority
GB
United Kingdom
Prior art keywords
image
lens
eyepiece
producing
images
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
GB6814/42A
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.)
Kodak Ltd
Original Assignee
Kodak Ltd
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 Kodak Ltd filed Critical Kodak Ltd
Publication of GB557491A publication Critical patent/GB557491A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/10—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument
    • G01C3/12—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument with monocular observation at a single point, e.g. coincidence type

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Lenses (AREA)
  • Telescopes (AREA)

Abstract

557,491. Range-finders. KODAK, Ltd. May 19, 1942, No. 6814. Convention date, July 19, 1941. [Class 97 (i)] An eyepiece is arranged unsymmetrically with respect to the objectives of a coincidence rangefinder, images of the objective images, of equal size, being formed in a single field in the focal plane of the eyepiece by lens systems of different powers and by reflectors in at least one of the imaging systems. The Figure shows objectives 25, 26, producing equal images 34, 35, a lens 28 producing an erect image 36 of the image 34 in the focal plane of an eyepiece 27, and a lens 29, and mirrors 30, 31 producing an image, coincident with the image 36, of the image 35. The mirror 31 may be semi-transparent, or may cover only half the field to produce a split field. Coincidence may be produced by any means, for example by moving the lens 29 laterally, a pointer 40 on its mount indicating range on an adjacent scale 41.
GB6814/42A 1941-07-19 1942-05-19 Improvements in or relating to range finders Expired GB557491A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US557491XA 1941-07-19 1941-07-19

Publications (1)

Publication Number Publication Date
GB557491A true GB557491A (en) 1943-11-23

Family

ID=21999904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6814/42A Expired GB557491A (en) 1941-07-19 1942-05-19 Improvements in or relating to range finders

Country Status (1)

Country Link
GB (1) GB557491A (en)

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