GB215673A - Improvements in optical instruments - Google Patents

Improvements in optical instruments

Info

Publication number
GB215673A
GB215673A GB3002223A GB3002223A GB215673A GB 215673 A GB215673 A GB 215673A GB 3002223 A GB3002223 A GB 3002223A GB 3002223 A GB3002223 A GB 3002223A GB 215673 A GB215673 A GB 215673A
Authority
GB
United Kingdom
Prior art keywords
lens
collective
measuring marks
lenses
situated
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
GB3002223A
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.)
EDWARD WILFRED TAYLOR
Original Assignee
EDWARD WILFRED TAYLOR
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 EDWARD WILFRED TAYLOR filed Critical EDWARD WILFRED TAYLOR
Priority to GB3002223A priority Critical patent/GB215673A/en
Publication of GB215673A publication Critical patent/GB215673A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
    • G02B15/04—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by changing a part

Abstract

215,673. Taylor, A., and Taylor, E. W. Nov. 29, 1923. Telescope systems.-In tacheometric telescopes in which the object-glass B and the measuring marks H are relatively fixed, the effect of a variable power collective lens situated at a predetermined point on the axis, is produced by a combination of two lenses, one of which is fixed, and the other is movable longitudinally, the lenses being situated between the predetermined point C and the measuring marks H. One of the lenses D is collective and may be a simple or compound lens, and the other lens is dispersive and of equal power to that of the collective lens. In the example given the lens D is fixed and the negative lens is movable and consists of a dispersive lens E and a collective lens F mounted in a sleeve L to slide between the lens D and the measuring marks H. This arrangement is optically equivalent to a variable power collective lens situated at the first principal point of the lens combination D, E, F and ensures that the object is always viewed so that its image in the plane of the measuring marks is always proportional to its distance from the object-glass. Numerical data of the optical system are given in the Specification and Specification 25622/10 is referred to.
GB3002223A 1923-11-29 1923-11-29 Improvements in optical instruments Expired GB215673A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3002223A GB215673A (en) 1923-11-29 1923-11-29 Improvements in optical instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3002223A GB215673A (en) 1923-11-29 1923-11-29 Improvements in optical instruments

Publications (1)

Publication Number Publication Date
GB215673A true GB215673A (en) 1924-05-15

Family

ID=10300991

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3002223A Expired GB215673A (en) 1923-11-29 1923-11-29 Improvements in optical instruments

Country Status (1)

Country Link
GB (1) GB215673A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5316553A (en) * 1988-06-30 1994-05-31 Sandoz Ltd. Dyestuffs for the dyeing of synthetic polyamides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5316553A (en) * 1988-06-30 1994-05-31 Sandoz Ltd. Dyestuffs for the dyeing of synthetic polyamides

Similar Documents

Publication Publication Date Title
GB750550A (en) Improvements in and relating to optical devices
GB830713A (en) A photographic objective
GB215673A (en) Improvements in optical instruments
US2015527A (en) Eye-piece having optical members that consist of a lens system and a prism system
US3471213A (en) Long range varifocal optical systems
GB592144A (en) Improvements in and relating to objectives suitable for photographic purposes
US2621564A (en) Optical eyepiece, particularly for wide angles
GB322460A (en) Improvements relating to optical viewing or sighting apparatus
GB1084437A (en) Improvements in or relating to optical systems of variable focal lengths
GB530506A (en) Improvements in or connected with eye-pieces for optical instruments
GB449434A (en) Improvements in photographic and like objectives
GB747228A (en) Improvements in or relating to anamorphotic optical systems
GB668125A (en) Improvements in and relating to auxiliary optical devices
FR948654A (en) Improvements in optical instruments, such as glasses, binoculars, etc.
GB767827A (en) Improvements in or relating to eye-pieces for microscopes, telescopes and other optical instruments
GB820590A (en) Optical system of variable focal length
GB425383A (en) Improvements in optical apparatus suitable for telescopic sighting devices
GB602813A (en) Improvements in or relating to photographic objectives
US3113992A (en) Focussing telescope lens system
GB688819A (en) Improvements in or relating to electroscopes
GB343228A (en) Improvements in or relating to telescopes or other optical instruments
GB309749A (en) Improvements in and relating to telescopes, sighting devices and so forth
GB605463A (en) Binocular eyepiece
GB784596A (en) Prism binocular
GB619678A (en) Improvements in or relating to variable power telescopes