GB717480A - Improvements in or relating to telemeters - Google Patents

Improvements in or relating to telemeters

Info

Publication number
GB717480A
GB717480A GB32143/52A GB3214352A GB717480A GB 717480 A GB717480 A GB 717480A GB 32143/52 A GB32143/52 A GB 32143/52A GB 3214352 A GB3214352 A GB 3214352A GB 717480 A GB717480 A GB 717480A
Authority
GB
United Kingdom
Prior art keywords
plate
ocular
prisms
pivoted
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
GB32143/52A
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.)
Optique et Precision de Levallois SA
Original Assignee
Optique et Precision de Levallois SA
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 Optique et Precision de Levallois SA filed Critical Optique et Precision de Levallois SA
Publication of GB717480A publication Critical patent/GB717480A/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

Abstract

717,480. Rangefinders. OPTIQUE ET PRECISION DE LAVALLOIS. Dec. 18, 1952 [Feb. 4, 1952], No. 32143/52. Class 97(1) A short home base range-finder comprises an outer envelope, a supporting plate resiliently mounted therein, the image deviating means being pivoted to the plate and the non-adjustable optical elements being cemented directly to the plate or to parts cemented to the plate, reading means co-operating with the deviating means and, supported by the envelope, an ocular or oculars. A coincidence rangefinder is shown in plan in Fig. 1 and in transverse section in Fig. 3. The ocular 8 is mounted in the casing 20 containing the resiliently mounted supporting plate 1. The renectors 2. 3 are mounted directly on the plate and the objectives 4 5 are mounted in V-blocks 12. Superposed prisms 6, 7 direct the light beams respectively to prisms 9, 10 (Fig. 3) each containing two reflecting surfaces at right angles and mounted on a member 13 secured to the plate 1. The vertex 11 is in the focal plane of the ocular and provides a boundary between the two images. If one of the two images is required inverted the angle between the reflecting faces of the prism 9 is changed to provide an additional reflection at a vertical face. The adjusting member 14 is pivoted at 16 and actuated through a lever 15, by a slidable cam 17 with a scale 18 reading against an index 19. The same method of construction, using a modified ocular and prism system, may be applied to a stereoscopic rangefinder.
GB32143/52A 1952-02-04 1952-12-18 Improvements in or relating to telemeters Expired GB717480A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR717480X 1952-02-04

Publications (1)

Publication Number Publication Date
GB717480A true GB717480A (en) 1954-10-27

Family

ID=9090075

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32143/52A Expired GB717480A (en) 1952-02-04 1952-12-18 Improvements in or relating to telemeters

Country Status (1)

Country Link
GB (1) GB717480A (en)

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