GB551460A - Improvements in and relating to light reflecting or transmitting devices, particularly for optical projection apparatus - Google Patents

Improvements in and relating to light reflecting or transmitting devices, particularly for optical projection apparatus

Info

Publication number
GB551460A
GB551460A GB301441A GB301441A GB551460A GB 551460 A GB551460 A GB 551460A GB 301441 A GB301441 A GB 301441A GB 301441 A GB301441 A GB 301441A GB 551460 A GB551460 A GB 551460A
Authority
GB
United Kingdom
Prior art keywords
projection apparatus
lens
treated
optical
relating
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
GB301441A
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.)
EARL WILLIAM BECK
Original Assignee
EARL WILLIAM BECK
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 EARL WILLIAM BECK filed Critical EARL WILLIAM BECK
Priority to GB301441A priority Critical patent/GB551460A/en
Publication of GB551460A publication Critical patent/GB551460A/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
    • C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
    • C03C15/02—Surface treatment of glass, not in the form of fibres or filaments, by etching for making a smooth surface

Abstract

551,460. Optical-projection apparatus. BECK, E. W., and WALKER, V. May 11, 1941, No. 3014. [Class 97 (i)] [Also in Groups XVI and XXIII] One or more surfaces of a transmitting or reflecting element in an optical-projection apparatus is treated so as to have a multiplicity of minute closely-spaced projections, and is polished by treatment with an aqueous solution of hydrofluoric and sulphuric acids in the ratio by weight, of more than two parts of sulphuric acid to one of hydrofluoric acid ; the ratio may be five to one. The treatments may be applied to one or more surfaces of the condenser system to the surface of a reflector behind the light source or elsewhere, or to an aspherical lens in the optical system. The Figure shows a projection system in which the plane surface of a condenser lens 62, or both its surfaces and either or both of the surfaces of the lens 61, are so treated the outer surface 71 of a reflector 70 may also be treated. The projections may be formed by etching, moulding, casting, pressing, abrading, or otherwise, and the polishing may be effected by dipping the lens &c. alternately into the acid bath at an elevated temperature and into fresh water.
GB301441A 1941-05-11 1941-05-11 Improvements in and relating to light reflecting or transmitting devices, particularly for optical projection apparatus Expired GB551460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB301441A GB551460A (en) 1941-05-11 1941-05-11 Improvements in and relating to light reflecting or transmitting devices, particularly for optical projection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB301441A GB551460A (en) 1941-05-11 1941-05-11 Improvements in and relating to light reflecting or transmitting devices, particularly for optical projection apparatus

Publications (1)

Publication Number Publication Date
GB551460A true GB551460A (en) 1943-02-24

Family

ID=9750326

Family Applications (1)

Application Number Title Priority Date Filing Date
GB301441A Expired GB551460A (en) 1941-05-11 1941-05-11 Improvements in and relating to light reflecting or transmitting devices, particularly for optical projection apparatus

Country Status (1)

Country Link
GB (1) GB551460A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2188925A (en) * 1986-04-08 1987-10-14 Glaverbel Matted glass and process of manufacturing same
GB2188924A (en) * 1986-04-08 1987-10-14 Glaverbel Matted glass, process of producing matted glass, photo-voltaic cell incorporating a glass sheet, and process of manufacturing such a cell

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2188925A (en) * 1986-04-08 1987-10-14 Glaverbel Matted glass and process of manufacturing same
GB2188924A (en) * 1986-04-08 1987-10-14 Glaverbel Matted glass, process of producing matted glass, photo-voltaic cell incorporating a glass sheet, and process of manufacturing such a cell
US4880677A (en) * 1986-04-08 1989-11-14 Glaverbel Matted glass
US4882214A (en) * 1986-04-08 1989-11-21 Glaverbel Matted glass
GB2188925B (en) * 1986-04-08 1990-05-09 Glaverbel Matted glass and process of manufacturing same
GB2188924B (en) * 1986-04-08 1990-05-09 Glaverbel Matted glass, process of producing matted glass, photo-voltaic cell incorporating a glass sheet, and process of manufacturing such a cell

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