GB204002A - Improvements in optical elements - Google Patents

Improvements in optical elements

Info

Publication number
GB204002A
GB204002A GB17697/23A GB1769723A GB204002A GB 204002 A GB204002 A GB 204002A GB 17697/23 A GB17697/23 A GB 17697/23A GB 1769723 A GB1769723 A GB 1769723A GB 204002 A GB204002 A GB 204002A
Authority
GB
United Kingdom
Prior art keywords
optical elements
crystallized
fluoride
zeiss
prisms
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
GB17697/23A
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 GB204002A publication Critical patent/GB204002A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/32—Non-oxide glass compositions, e.g. binary or ternary halides, sulfides or nitrides of germanium, selenium or tellurium
    • C03C3/325—Fluoride glasses
    • C03C3/326—Fluoride glasses containing beryllium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

204,002. Zeiss, C. [Firm of]. Sept. 12, 1922, [Convention date]. Lenses; prisms. - Optical elements are constructed of crystallized fluoride of sodium or crystallized fluoride of lithium, the optical properties, of these materials enabling them to be used as a substitute for natural fluorspar.
GB17697/23A 1922-09-12 1923-07-09 Improvements in optical elements Expired GB204002A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE204002X 1922-09-12

Publications (1)

Publication Number Publication Date
GB204002A true GB204002A (en) 1923-09-20

Family

ID=5779514

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17697/23A Expired GB204002A (en) 1922-09-12 1923-07-09 Improvements in optical elements

Country Status (1)

Country Link
GB (1) GB204002A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487873A (en) * 1946-10-02 1949-11-15 Eastman Kodak Co Apochromatic telescope objective having three air spaced components

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487873A (en) * 1946-10-02 1949-11-15 Eastman Kodak Co Apochromatic telescope objective having three air spaced components

Similar Documents

Publication Publication Date Title
GB204002A (en) Improvements in optical elements
GB160935A (en) Improvements in binocular glasses
GB194164A (en) Improvements in or relating to spectacle or like optical frames
GB159046A (en) Improvements in or relating to optical instruments, goggles and the like
CA203882A (en) Spectacle lense
GB169249A (en) Improvements in means for focussing optical instruments
GB165657A (en) Improvements in lenses
GB170929A (en) Improvements in and relating to binoculars, field glasses and like optical apparatus
GB165834A (en) Improvements in ophthalmic lenses
GB184425A (en) Improvements in and relating to cleaners for the lens of spectacles or the like
GB171028A (en) Optical prism for the marking out of right angles
CA203462A (en) Eye-glass and spectacles
GB192038A (en) Improvements in or relating to multifocal ophthalmic lenses
GB173048A (en) Improvements in prismatic telescopes
GB163104A (en) Improvements in double prismatic telescopes
CA203562A (en) Ophthalmic lens
GB167483A (en) Improvements in and relating to focussing means for optical instruments
GB166304A (en) Improvements in or relating to optical projection apparatus
CA197061A (en) Jeweller's pin pointer
GB161663A (en) Improvements in and relating to mounts and the like for eyeglasses or spectacles
AU613322A (en) Improvements in nose grips for pince-nez spectacles andthe like
CA205064A (en) Lens
CA190560A (en) Spectacle
CA211135A (en) Ophthalmic lense
CA212056A (en) Joint for the frame of spectacles