GB677202A - Improvements in objectives of modified gaussian type - Google Patents

Improvements in objectives of modified gaussian type

Info

Publication number
GB677202A
GB677202A GB20758/50A GB2075850A GB677202A GB 677202 A GB677202 A GB 677202A GB 20758/50 A GB20758/50 A GB 20758/50A GB 2075850 A GB2075850 A GB 2075850A GB 677202 A GB677202 A GB 677202A
Authority
GB
United Kingdom
Prior art keywords
objective
combination
component
cemented surface
yellow
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
GB20758/50A
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.)
Voigtlander AG
Original Assignee
Voigtlander 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 Voigtlander AG filed Critical Voigtlander AG
Publication of GB677202A publication Critical patent/GB677202A/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

677,202. Optical objectives. VOIGTLANDER & SOHN AKT.-GES. Aug. 22, 1950 [Jan. 27, 1950], No. 20758/50. Class 97 (i). A wide-angle modified Gaussian objective comprises a combination of two components on each side of a stop, each combination comprising, from front to rear, a simple uncemented single meniscus lens followed by a compound component of opposite sign, the two single meniscus lenses being of opposite sign, and the compound component of the front combination being meniscus, the arithmetic mean of the refractive indices for the yellow He line of the two single lenses being greater than 1.65 and the last component of the objective having a collective cemented surface convex to the front, the difference in refractive index for He yellow on the two sides of this cemented surface being greater than 0.03. The said cemented surface may have a radius of curvature less than <SP>2</SP>/ 3 the equivalent focal length of the objective and such that the ratios of this radius with those of the outer surfaces of the objective lie between <SP>2</SP>/ 3 and <SP>3</SP>/ 2' Numerical data are given for one example of the lens shown in which the surfaces R4, R<SP>4</SP>1 in the second component are cemented. They may, however, be slightly separated.
GB20758/50A 1950-01-27 1950-08-22 Improvements in objectives of modified gaussian type Expired GB677202A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH677202X 1950-01-27

Publications (1)

Publication Number Publication Date
GB677202A true GB677202A (en) 1952-08-13

Family

ID=4528205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20758/50A Expired GB677202A (en) 1950-01-27 1950-08-22 Improvements in objectives of modified gaussian type

Country Status (1)

Country Link
GB (1) GB677202A (en)

Similar Documents

Publication Publication Date Title
GB830713A (en) A photographic objective
GB1303293A (en)
GB709172A (en) Improvements in objectives of modified gaussian type with a large image field
US2405301A (en) Optical system
GB1196427A (en) Symmetrical Objective
GB677202A (en) Improvements in objectives of modified gaussian type
GB538653A (en) Improvements in or relating to optical objectives
GB1164762A (en) Improvements in photographic lens systems
GB544658A (en) Improvements in or relating to optical objectives
US2789463A (en) Focal lens system for attaching to photographic objectives
GB706605A (en) Photographic objective
US2621564A (en) Optical eyepiece, particularly for wide angles
GB547739A (en) Improvements in or relating to optical objectives
GB522651A (en) Improvements in or relating to optical objectives
US2371165A (en) Wide aperture objective
US3601474A (en) Triplet objective
GB579521A (en) Improvements in or relating to telephoto lenses
GB1095767A (en) Wide angle lens
GB372228A (en) Improvements in lenses for photographic and other purposes
US2600610A (en) High-aperture and high-transmission three component objective
GB1020462A (en)
GB1259086A (en)
GB595422A (en) Photographic objectives corrected spherically, astigmatically and for coma for one or more colours
GB523446A (en) Improvements in or relating to optical objectives
GB503589A (en) Improvements in or relating to optical systems