GB718178A - Projection lens-system - Google Patents

Projection lens-system

Info

Publication number
GB718178A
GB718178A GB2943/51A GB294351A GB718178A GB 718178 A GB718178 A GB 718178A GB 2943/51 A GB2943/51 A GB 2943/51A GB 294351 A GB294351 A GB 294351A GB 718178 A GB718178 A GB 718178A
Authority
GB
United Kingdom
Prior art keywords
focal length
front member
members
projection lens
rear member
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
GB2943/51A
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.)
Cycloptic Anstalt fur Optik &
Original Assignee
Cycloptic Anstalt fur Optik &
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 Cycloptic Anstalt fur Optik & filed Critical Cycloptic Anstalt fur Optik &
Publication of GB718178A publication Critical patent/GB718178A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below

Landscapes

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

Abstract

718,178. Optical systems. CYCLOPTIC ANSTALT FUR OPTIK & MECHANIK. Feb. 6, 1951 [March 8, 1950], No. 2943/51. Class 97(1) A projection lens system is composed of two airseparated members, the front member on the long conjugate side comprising at least two lenses and the rear member consisting of a chromatically-corrected triplet-like system of a negative component between two positive components both members contributing in common to the image correction of the system. the total constructional length of the system being at least 0.7 of and at most twice the total focal length of the system, the focal length of the rear member differing by not more than 20 per cent from the focal length of the system and the focal length of the front member being greater than that of the whole system. The rear principal plane of the front member coincides at least approximately with the front focal plane of the rear member. Numerical data are given for an example of the objective shown the front member consisting of a simple positive lens followed by a doublet.
GB2943/51A 1950-03-08 1951-02-06 Projection lens-system Expired GB718178A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH718178X 1950-03-08

Publications (1)

Publication Number Publication Date
GB718178A true GB718178A (en) 1954-11-10

Family

ID=4531297

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2943/51A Expired GB718178A (en) 1950-03-08 1951-02-06 Projection lens-system

Country Status (1)

Country Link
GB (1) GB718178A (en)

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