GB614255A - Improvements in or relating to optical elements - Google Patents

Improvements in or relating to optical elements

Info

Publication number
GB614255A
GB614255A GB19382/46A GB1938246A GB614255A GB 614255 A GB614255 A GB 614255A GB 19382/46 A GB19382/46 A GB 19382/46A GB 1938246 A GB1938246 A GB 1938246A GB 614255 A GB614255 A GB 614255A
Authority
GB
United Kingdom
Prior art keywords
solution
optical elements
agar
lenses
dried
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
GB19382/46A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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
Priority to GB867941A priority Critical patent/GB550644A/en
Priority claimed from GB867941A external-priority patent/GB550644A/en
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB614255A publication Critical patent/GB614255A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/04—Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere, e.g. so called "aspheric" lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00019—Production of simple or compound lenses with non-spherical faces, e.g. toric faces
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L89/00—Compositions of proteins; Compositions of derivatives thereof
    • C08L89/04—Products derived from waste materials, e.g. horn, hoof or hair
    • C08L89/06—Products derived from waste materials, e.g. horn, hoof or hair derived from leather or skin, e.g. gelatin
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G02B1/041—Lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2005/00—Use of polysaccharides or derivatives as moulding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dermatology (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Eyeglasses (AREA)

Abstract

614,255. Lenses and other optical elements. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. June 28, 1946, No. 19382. Convention date, Oct. 10, 1939. [Class 97 (i)] [Also in Group V] Lenses or other optical elements are made from material gelatinised from a solution and dried; the element may be hardened. The element may be a correcting element 9, Fig. 3, for use in correcting spherical aberration in a reflecting objective, and may be formed from a colloidal solution of gelatin, agar-agar, pectin, &c., or of silicates or aluminium oxide with or without glycerine. The solution may be passed through a tube 6 on to a plate 2 beneath a hollow mould 3 maintained by water circulating through pipes 4, 5, at a temperature such that the material remains in solution. Gradual reduction of temperature gelatinises the solution and produces a mass 7. The mass is dried and its heights become reduced as shown in Fig. 3, while its dimensions parallel to the plate remain the same. The enlargements existing in the mould of the desired heights in the element enable greater accuracy to be obtained in the finished element. Hardening may be effected by formalin &c.
GB19382/46A 1939-10-10 1946-06-28 Improvements in or relating to optical elements Expired GB614255A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB867941A GB550644A (en) 1941-07-09 1941-07-09 Improvements in or relating to optical elements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL614255X 1939-10-10
GB867941A GB550644A (en) 1941-07-09 1941-07-09 Improvements in or relating to optical elements

Publications (1)

Publication Number Publication Date
GB614255A true GB614255A (en) 1948-12-13

Family

ID=26242340

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19382/46A Expired GB614255A (en) 1939-10-10 1946-06-28 Improvements in or relating to optical elements

Country Status (2)

Country Link
GB (1) GB614255A (en)
NL (1) NL57677C (en)

Also Published As

Publication number Publication date
NL57677C (en)

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