GB692743A - Improvements in or relating to optical objectives - Google Patents

Improvements in or relating to optical objectives

Info

Publication number
GB692743A
GB692743A GB574251A GB574251A GB692743A GB 692743 A GB692743 A GB 692743A GB 574251 A GB574251 A GB 574251A GB 574251 A GB574251 A GB 574251A GB 692743 A GB692743 A GB 692743A
Authority
GB
United Kingdom
Prior art keywords
objective
rear surface
aspherical
taylor
march
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
GB574251A
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 GB574251A priority Critical patent/GB692743A/en
Publication of GB692743A publication Critical patent/GB692743A/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
    • G02B17/0856—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors
    • G02B17/086—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors wherein the system is made of a single block of optical material, e.g. solid catadioptric systems
    • 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
    • G02B17/0804—Catadioptric systems using two curved mirrors
    • G02B17/0808—Catadioptric systems using two 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
    • G02B17/0884—Catadioptric systems having a pupil corrector

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

692,743. Optical objectives. WREATHALL, W. M., and TAYLOR, TAYLOR, & HOBSON, Ltd. March 4, 1952 [March 9, 1951], No. 5742/51. Class 97 (i). A corrected objective comprises a front refracting member air-spaced from a meniscus rear member having its spherical outer surfaces concave to the front and its front surface centrally coated and rear surface annularly coated so as to be reflecting, so that light entering the objective through the front member will be refracted at the curved outer zone of the front surface of the rear member, reflected successively by the said annular and control reflecting portions and will emerge by refraction at the curved central zone of the rear surface. Numerical data are given for one example of the objective shown in which all the surfaces of the front member are spherical, for one example in which the surface R<SP>1</SP> is aspherical and of the form x = a 2 y<SP>2</SP> + a 4 y<SP>4</SP> + ... , and for one example in which the two elements of the front member are cemented together, the rear surface of this doublet being aspherical. Specifications 541,650 and 541,652 are referred to.
GB574251A 1951-03-09 1951-03-09 Improvements in or relating to optical objectives Expired GB692743A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB574251A GB692743A (en) 1951-03-09 1951-03-09 Improvements in or relating to optical objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB574251A GB692743A (en) 1951-03-09 1951-03-09 Improvements in or relating to optical objectives

Publications (1)

Publication Number Publication Date
GB692743A true GB692743A (en) 1953-06-10

Family

ID=9801801

Family Applications (1)

Application Number Title Priority Date Filing Date
GB574251A Expired GB692743A (en) 1951-03-09 1951-03-09 Improvements in or relating to optical objectives

Country Status (1)

Country Link
GB (1) GB692743A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2852798A1 (en) * 1977-12-07 1979-07-05 Canon Kk OPTICAL SCANNING DEVICE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2852798A1 (en) * 1977-12-07 1979-07-05 Canon Kk OPTICAL SCANNING DEVICE

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