GB217262A - Improvements in and connected with photographic objectives - Google Patents

Improvements in and connected with photographic objectives

Info

Publication number
GB217262A
GB217262A GB101223A GB101223A GB217262A GB 217262 A GB217262 A GB 217262A GB 101223 A GB101223 A GB 101223A GB 101223 A GB101223 A GB 101223A GB 217262 A GB217262 A GB 217262A
Authority
GB
United Kingdom
Prior art keywords
quartz
rays
lens
ultra violet
photographic objectives
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
GB101223A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB101223A priority Critical patent/GB217262A/en
Publication of GB217262A publication Critical patent/GB217262A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/02—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having one + component only

Landscapes

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

Abstract

217,262. Baker, T. Thorne-. Jan. 11, 1923. Lenses. - Photographic objectives consist of an achromatic lens composed of two or more components both of all of which are capable not onlv of transmitting the visible rays but also a great portion of the ultra violet rays. In one example, of which numerical data are given in the Specification, a boro-silicate crown component L<1> is combined with an ultra violet flint glass L<2>, and in a further example, the lens combination may be made of quartz and fluorite or quartz and Iceland spar. With this lens, when used with protographic plates treated so as to be sensitive in a pronounced degree to the ultraviolet rays, the speed is accelerated.
GB101223A 1923-01-11 1923-01-11 Improvements in and connected with photographic objectives Expired GB217262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB101223A GB217262A (en) 1923-01-11 1923-01-11 Improvements in and connected with photographic objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB101223A GB217262A (en) 1923-01-11 1923-01-11 Improvements in and connected with photographic objectives

Publications (1)

Publication Number Publication Date
GB217262A true GB217262A (en) 1924-06-11

Family

ID=9714592

Family Applications (1)

Application Number Title Priority Date Filing Date
GB101223A Expired GB217262A (en) 1923-01-11 1923-01-11 Improvements in and connected with photographic objectives

Country Status (1)

Country Link
GB (1) GB217262A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865253A (en) * 1956-12-10 1958-12-23 Servo Corp Of America Infrared achromat lens
US7692879B2 (en) 2004-07-16 2010-04-06 Carl Zeiss Microimaging Gmbh Correction device for an optical arrangement and confocal microscope with such a device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865253A (en) * 1956-12-10 1958-12-23 Servo Corp Of America Infrared achromat lens
US7692879B2 (en) 2004-07-16 2010-04-06 Carl Zeiss Microimaging Gmbh Correction device for an optical arrangement and confocal microscope with such a device

Similar Documents

Publication Publication Date Title
GB217262A (en) Improvements in and connected with photographic objectives
GB812576A (en) Improvements in or relating to glass composition
GB634684A (en) Improvements in and relating to optical glass
GB508448A (en) Improvements in soft effect attachments for use with photographic objectives
GB257507A (en) Improvements in anti-glare devices
GB497481A (en) Improvements in or relating to the treatment of photographic prints
GB547666A (en) Improvements in or relating to optical objectives
GB225425A (en) Improvements in lenses
AU104194B2 (en) Improvements in aspherical and like lenses, mirrors andother precision optical devices
GB221722A (en) Improvements in lenses
ES251U (en) Glasses or protective lenses of double visuality against dazzling by light or bright flashes. (Machine-translation by Google Translate, not legally binding)
GB550644A (en) Improvements in or relating to optical elements
GB519262A (en) Improvements relating to optical projection apparatus
CA345396A (en) Photographic printing with ultra-violet rays
GB564816A (en) Improvements in or relating to optical objectives
ES159699A2 (en) A PROCEDURE FOR EXAMINING AND NUMERICALLY FINDING DISTORTIONS IN FLAT AND SIMILAR GLASS
AU1935734A (en) Improvements in or relating to optical lenses and similar devices
GB602863A (en) Improvements in or relating to photographic objectives
GB566114A (en) Improvements in the lighting of the scales of indicating instruments
ES145390A3 (en) Improvements in the manufacture of glasses, lenses and the like for personal use.
ES34566U (en) New glass for glasses and lenses (Machine-translation by Google Translate, not legally binding)
ES724U (en) Glass of appropriate coloration, with mounting adaptable to ordinary glasses and lenses, to preserve the sight of sunlight. (Machine-translation by Google Translate, not legally binding)
GB665682A (en) Improvements in photographic processes
GB559699A (en) Improvements in or relating to optical objectives
CA322619A (en) Spectacles and goggles