GB399452A - Improvements in converging achromatic eye-pieces - Google Patents

Improvements in converging achromatic eye-pieces

Info

Publication number
GB399452A
GB399452A GB17386/33A GB1738633A GB399452A GB 399452 A GB399452 A GB 399452A GB 17386/33 A GB17386/33 A GB 17386/33A GB 1738633 A GB1738633 A GB 1738633A GB 399452 A GB399452 A GB 399452A
Authority
GB
United Kingdom
Prior art keywords
lens
converging
achromatic
spherical surface
eye
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
GB17386/33A
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 GB399452A publication Critical patent/GB399452A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses
    • G02B25/001—Eyepieces

Landscapes

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

Abstract

399,452. Eyepieces. ZEISS, C., [Firm of], Carl-Zeiss-Strasse, Jena, Germany. June 19, 1933, No. 17386. Convention date, June 22, 1932. [Class 97 (i).] In a converging achromatic eyepiece for a prismatic telescope, one of the lens surfaces is made of non-spherical form such that the marginal thickness of the lens is increased by at least 1/30 of the lens diameter, compared to the thickness of a lens having a spherical surface which touches, and has the same vertex curvature as, the said non-spherical surface. As shown the eyepiece system consists of two components and the front surface of the rear component is of paraboloidal form. A spherical surface having a curvature equal to the vertex curvature of the paraboloid is shown in dotted lines. Constructional data are given.
GB17386/33A 1932-06-22 1933-06-19 Improvements in converging achromatic eye-pieces Expired GB399452A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE399452X 1932-06-22

Publications (1)

Publication Number Publication Date
GB399452A true GB399452A (en) 1933-10-05

Family

ID=6397492

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17386/33A Expired GB399452A (en) 1932-06-22 1933-06-19 Improvements in converging achromatic eye-pieces

Country Status (1)

Country Link
GB (1) GB399452A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930699A1 (en) * 1978-08-02 1980-02-21 Svenska Thorn Ab DEVICE FOR PREPARING GAS-DRINKING BEVERAGES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930699A1 (en) * 1978-08-02 1980-02-21 Svenska Thorn Ab DEVICE FOR PREPARING GAS-DRINKING BEVERAGES

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