GB438682A - Improvements in or relating to eyepieces of optical instruments - Google Patents

Improvements in or relating to eyepieces of optical instruments

Info

Publication number
GB438682A
GB438682A GB3111534A GB3111534A GB438682A GB 438682 A GB438682 A GB 438682A GB 3111534 A GB3111534 A GB 3111534A GB 3111534 A GB3111534 A GB 3111534A GB 438682 A GB438682 A GB 438682A
Authority
GB
United Kingdom
Prior art keywords
indicator
optical instruments
scale
sleeve
focusing
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
GB3111534A
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.)
Ottway & Co Ltd W
WILLIAM ROBERT OTTWAY
Original Assignee
Ottway & Co Ltd W
WILLIAM ROBERT OTTWAY
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 Ottway & Co Ltd W, WILLIAM ROBERT OTTWAY filed Critical Ottway & Co Ltd W
Priority to GB3111534A priority Critical patent/GB438682A/en
Publication of GB438682A publication Critical patent/GB438682A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses
    • G02B25/001—Eyepieces

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Telescopes (AREA)

Abstract

438,682. Optical instruments. OTTWAY & CO., Ltd., W., and OTTWAY, W. R., Orion Works, Ealing, London. Oct. 30, 1934, No. 31115. [Class 97 (i)] In optical instruments such as telescopes, binoculars &c., in which focusing is effected by adjustment of the eyepiece and an indicator is provided by which the adjustment can be read, the indicator is arranged within the instrument so as to be visible on looking through the eyepiece. As shown, the eye lens 4 is mounted in a sleeve 1 screwed on to the tube 2 so that rotation of the sleeve varies the distance between the lens 4 and field lens 5 for focusing. An index 8 associated with a fixed focusing scale 10 graduated in diopters is connected by a pin 9 to the sleeve 1 so as to rotate therewith without moving axially. The scale 10 is located around the outer edge of the field so as not to obtrude in the normal line of vision. A lamp 12 may be provided to illuminate the scale and indicator.
GB3111534A 1934-10-30 1934-10-30 Improvements in or relating to eyepieces of optical instruments Expired GB438682A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3111534A GB438682A (en) 1934-10-30 1934-10-30 Improvements in or relating to eyepieces of optical instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3111534A GB438682A (en) 1934-10-30 1934-10-30 Improvements in or relating to eyepieces of optical instruments

Publications (1)

Publication Number Publication Date
GB438682A true GB438682A (en) 1935-11-21

Family

ID=10318194

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3111534A Expired GB438682A (en) 1934-10-30 1934-10-30 Improvements in or relating to eyepieces of optical instruments

Country Status (1)

Country Link
GB (1) GB438682A (en)

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