GB541651A - Improvements in or relating to optical systems - Google Patents

Improvements in or relating to optical systems

Info

Publication number
GB541651A
GB541651A GB789040A GB789040A GB541651A GB 541651 A GB541651 A GB 541651A GB 789040 A GB789040 A GB 789040A GB 789040 A GB789040 A GB 789040A GB 541651 A GB541651 A GB 541651A
Authority
GB
United Kingdom
Prior art keywords
spheroidal
spherical
objective
reflecting
occulating
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
GB789040A
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.)
Taylor Taylor and Hobson Ltd
Original Assignee
Taylor Taylor and Hobson 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 Taylor Taylor and Hobson Ltd filed Critical Taylor Taylor and Hobson Ltd
Priority to GB789040A priority Critical patent/GB541651A/en
Publication of GB541651A publication Critical patent/GB541651A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0852—Catadioptric systems having a field corrector only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/02—Catoptric systems, e.g. image erecting and reversing system
    • G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
    • G02B17/0626—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror using three curved mirrors
    • G02B17/0631—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror using three curved mirrors on-axis systems with at least one of the mirrors having a central aperture
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0836—Catadioptric systems using more than three curved mirrors
    • G02B17/084—Catadioptric systems using more than three curved mirrors on-axis systems with at least one of the mirrors having a central aperture

Abstract

541,651. Optical systems. TAYLOR, TAYLOR & HOBSON, Ltd., and WARMISHAM, A. May 2, 1940, No. 7890. [ Class 97 (i)] An objective comprises two or more spherical or spheroidal reflecting surfaces of which at least one is spheroidal, the generating curve of each spheroidal surface being, in polar co-ordinates, of the form r=r 0 +A#<SP>4</SP>-f-B#<SP>6</SP>+ ... higher powers of # where r 0 is the radius of curvature of the occulating sphere at the vertex and the coefficients AB ... are such that the deformation of such surface from the occulating sphere corrects, at least to the first order, for spherical aberration, coma, and astigmatism of one or more of the other surfaces; the vertex of each spheroidal surface is disposed substantially at the centre of curvature of the surface to be corrected or at the image of such centre formed by paraxial imagery by intervening elements. Fig. 1 shows an anastigmatic photographic objective having spherical reflecting surfaces R2, R3, a spheroidal reflecting surface R1, and an afocal correcting reflecting surface R4. Modifications are described comprising two spheroidal and one spherical surfaces, and a symmetrical arrangement of four surfaces, two spherical and two spheroidal, and capable of use as an erector between the objective and eyepiece of a telescope. Complete data for six examples are set out. Specification 541,650 is referred to.
GB789040A 1940-05-02 1940-05-02 Improvements in or relating to optical systems Expired GB541651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB789040A GB541651A (en) 1940-05-02 1940-05-02 Improvements in or relating to optical systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB789040A GB541651A (en) 1940-05-02 1940-05-02 Improvements in or relating to optical systems

Publications (1)

Publication Number Publication Date
GB541651A true GB541651A (en) 1941-12-05

Family

ID=9841767

Family Applications (1)

Application Number Title Priority Date Filing Date
GB789040A Expired GB541651A (en) 1940-05-02 1940-05-02 Improvements in or relating to optical systems

Country Status (1)

Country Link
GB (1) GB541651A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2585009A (en) * 1945-08-02 1952-02-12 Farnsworth Res Corp Concentric optical system
GB2173608A (en) * 1985-03-25 1986-10-15 Richard George Bingham Imaging system having three curved and one aspherical mirror
CN102981255A (en) * 2011-09-07 2013-03-20 上海微电子装备有限公司 Large view field projection objective lens

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2585009A (en) * 1945-08-02 1952-02-12 Farnsworth Res Corp Concentric optical system
GB2173608A (en) * 1985-03-25 1986-10-15 Richard George Bingham Imaging system having three curved and one aspherical mirror
CN102981255A (en) * 2011-09-07 2013-03-20 上海微电子装备有限公司 Large view field projection objective lens
CN102981255B (en) * 2011-09-07 2016-04-20 上海微电子装备有限公司 A kind of Large visual angle projection objective

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