GB247606A - Improvements in or relating to optical instruments for measuring distances - Google Patents

Improvements in or relating to optical instruments for measuring distances

Info

Publication number
GB247606A
GB247606A GB4311/26A GB431126A GB247606A GB 247606 A GB247606 A GB 247606A GB 4311/26 A GB4311/26 A GB 4311/26A GB 431126 A GB431126 A GB 431126A GB 247606 A GB247606 A GB 247606A
Authority
GB
United Kingdom
Prior art keywords
prisms
distance
vernier
field
difference
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
GB4311/26A
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.)
STEPHEN ELEK
Original Assignee
STEPHEN ELEK
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 STEPHEN ELEK filed Critical STEPHEN ELEK
Publication of GB247606A publication Critical patent/GB247606A/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
    • 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
    • G01C3/02—Details

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Optical Distance (AREA)
  • Telescopes (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

247,606. Elek, S. Feb. 14, 1925, [Convention date]. Tacheometers.-In order to utilize the telescope of a surveying instrument for distance measuring, two prisms lenses or mirrors are arranged in front of the eye-piece and at an angle to one another so as to divide the field of vision into right and left hand portions, having optical axes with a given difference of level. By this means the distance of the stadia rod from the instrument can be read directly by observing the apparent position of the vernier in one half of the field with reference to the zero position of stadia rod in the other half of the field. In the example utilizing reflecting prisms a, b the rays o from the object glass are reflected from the relatively inclined surfaces, T1, T2, t1, t2 so that they emerge from the two prisms with a difference of level amounting, e.g. to one-hundredth of the focal length of the objective g. In this case, the distance is one hundred times the apparent difference of position of the vernier and zero of the rod. An initial adjustment of the vernier enables the distance to be calculated to the centre of the observing instrument. In other examples, refracting prisms and portions of concave lenses are used to produce the same result.
GB4311/26A 1925-02-14 1926-02-15 Improvements in or relating to optical instruments for measuring distances Expired GB247606A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU247606X 1925-02-14

Publications (1)

Publication Number Publication Date
GB247606A true GB247606A (en) 1926-07-22

Family

ID=10978549

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4311/26A Expired GB247606A (en) 1925-02-14 1926-02-15 Improvements in or relating to optical instruments for measuring distances

Country Status (1)

Country Link
GB (1) GB247606A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434172A (en) * 1945-05-02 1948-01-06 Eastman Kodak Co Inexpensive monobloc range finder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434172A (en) * 1945-05-02 1948-01-06 Eastman Kodak Co Inexpensive monobloc range finder

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