GB482874A - Improvements in photographic objectives - Google Patents

Improvements in photographic objectives

Info

Publication number
GB482874A
GB482874A GB30311/37A GB3031137A GB482874A GB 482874 A GB482874 A GB 482874A GB 30311/37 A GB30311/37 A GB 30311/37A GB 3031137 A GB3031137 A GB 3031137A GB 482874 A GB482874 A GB 482874A
Authority
GB
United Kingdom
Prior art keywords
mirror lens
objective
divergent member
nov
divergent
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
GB30311/37A
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
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 Carl Zeiss AG filed Critical Carl Zeiss AG
Publication of GB482874A publication Critical patent/GB482874A/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
    • G02B17/0884—Catadioptric systems having a pupil corrector
    • 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

Landscapes

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

Abstract

482,874. Photographic objectives. ZEISS, C., [Firm of]. Nov. 5, 1937, No. 30311. Convention date, Nov. 12, 1936. [Class 97 (i)] An objective containing a mirror lens comprises two exterior convergent members and an interior divergent member, the rearmost member being the mirror lens which has its concave side turned towards the divergent member. The distance l<2> between the front vertex of the mirror lens and the rear vertex of the divergent member is greater than the focal length of the objective. The radius of curvature of the reflecting surface r6 of the mirror lens is at least 1À25 times that of the refracting surface r<5>. The objective can be used as a, microscope objective by reversing the path of the rays, the object to be magnified being situated between the mirror lens and the divergent member and illuminated through an axial aperture of the mirror lens. Data are given for the system shown, having an aperture f /0À5.
GB30311/37A 1936-11-12 1937-11-05 Improvements in photographic objectives Expired GB482874A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE482874X 1936-11-12

Publications (1)

Publication Number Publication Date
GB482874A true GB482874A (en) 1938-04-06

Family

ID=6542896

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30311/37A Expired GB482874A (en) 1936-11-12 1937-11-05 Improvements in photographic objectives

Country Status (1)

Country Link
GB (1) GB482874A (en)

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