GB2392130A - Mould creation for high surface quality curved optical components - Google Patents

Mould creation for high surface quality curved optical components Download PDF

Info

Publication number
GB2392130A
GB2392130A GB0219609A GB0219609A GB2392130A GB 2392130 A GB2392130 A GB 2392130A GB 0219609 A GB0219609 A GB 0219609A GB 0219609 A GB0219609 A GB 0219609A GB 2392130 A GB2392130 A GB 2392130A
Authority
GB
United Kingdom
Prior art keywords
mould
optical components
curved optical
creation
high surface
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.)
Withdrawn
Application number
GB0219609A
Other versions
GB0219609D0 (en
Inventor
Matthew Bleasdale
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB0219609A priority Critical patent/GB2392130A/en
Publication of GB0219609D0 publication Critical patent/GB0219609D0/en
Publication of GB2392130A publication Critical patent/GB2392130A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00Producing optical elements, e.g. lenses or prisms
    • B29D11/00596Mirrors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/38Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842Manufacturing moulds, e.g. shaping the mould surface by machining
    • B29C33/3857Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00Producing optical elements, e.g. lenses or prisms
    • B29D11/00009Production of simple or compound lenses
    • B29D11/00432Auxiliary operations, e.g. machines for filling the moulds

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

Method for the production, through deposition of material onto a pre-existing curved optical surface with the desired properties for reproduction, of a highly accurate mould for use in the mass production of optical components. The reproduction of the optical components may be by injection moulding or another process.

Description

1 23921 30
Mould creation for high surface quality curved optical components The quality of surface finish on optical components is important, especially on reflecting surfaces. The smoother the surface finish the better the optical qualities of a component.
A surface finish with a value of 1/8th of a wavelength of visible light (the normal value taken for wavelength is green light at about 500-SSOnm) from peak to valley of surface imperfections as a root mean square (RMS) value over the whole of the surface is normally considered good for uses such as astronomy where the optical quality of components is critical.
To date, highly accurate curved optical surfaces with finishes of 1/8th of a wavelength RMS, have generally been produced by grinding and polishing. This method is labour intensive and time consuming, despite the introduction of automation.
While plastics have been used to create curved optical components for some time.
However moulds for the production of plastic optical components are made with a diamond tipped cutting tool, leading to a surface accuracy of about 500nm, which is insufficient for precision use.
The current situation therefore leads to a market with either high quality optical components which are expensive due to the intensive production process, or cheap optical components with poor surface finishes.
The present invention details the production of a highly accurate mould, through the deposition of material onto an existing surface that has the desired optical properties and surface finish? for use in the production of curved optical components.
For example, to mass produce a concave mirror surface with a high quality surface finish of 1 /8th wavelength RMS or better, a blank with the desired shape and surface finish properties may be coated with metal to produce a mould. The metallic coating of the surface may be through sputtering or evaporation with electroforming to develop the thickness of the metallic layer. This mould may then be used to produce plastic components, which have a shape and surface accuracy that closely resembles that of the original blank used to produce the mould. The production of the plastic component may be through injection moulding or another process.
This process may be used to replicate both concave and convex surfaces for use as lens' and mirrors.

Claims (2)

  1. -2 Claims
    I. A high surface accuracy mould, created through the deposition of material onto an existing curved optical surface with the desired optical shape and surface finish characteristics.
  2. 2. Items created through the use of a mould as detailed in claim I, by means of injection moulding or another process.
GB0219609A 2002-08-22 2002-08-22 Mould creation for high surface quality curved optical components Withdrawn GB2392130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0219609A GB2392130A (en) 2002-08-22 2002-08-22 Mould creation for high surface quality curved optical components

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0219609A GB2392130A (en) 2002-08-22 2002-08-22 Mould creation for high surface quality curved optical components

Publications (2)

Publication Number Publication Date
GB0219609D0 GB0219609D0 (en) 2002-10-02
GB2392130A true GB2392130A (en) 2004-02-25

Family

ID=9942808

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0219609A Withdrawn GB2392130A (en) 2002-08-22 2002-08-22 Mould creation for high surface quality curved optical components

Country Status (1)

Country Link
GB (1) GB2392130A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4434113A (en) * 1982-07-13 1984-02-28 Neefe Charles W Spin casting lenses having reduced spherical aberration
JPH03230923A (en) * 1990-02-05 1991-10-14 Toshiba Corp Mold and manufacture therefor
JPH04131211A (en) * 1990-09-21 1992-05-01 Toshiba Mach Co Ltd Plastic lens manufacture and manufacturing mold
JPH0985749A (en) * 1995-09-28 1997-03-31 Washi Kosan Kk Mold for lens of glasses
EP0878291A1 (en) * 1997-05-14 1998-11-18 Eastman Kodak Company Method for fabricating tools for molding diffractive surfaces on optical lenses

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4434113A (en) * 1982-07-13 1984-02-28 Neefe Charles W Spin casting lenses having reduced spherical aberration
JPH03230923A (en) * 1990-02-05 1991-10-14 Toshiba Corp Mold and manufacture therefor
JPH04131211A (en) * 1990-09-21 1992-05-01 Toshiba Mach Co Ltd Plastic lens manufacture and manufacturing mold
JPH0985749A (en) * 1995-09-28 1997-03-31 Washi Kosan Kk Mold for lens of glasses
EP0878291A1 (en) * 1997-05-14 1998-11-18 Eastman Kodak Company Method for fabricating tools for molding diffractive surfaces on optical lenses

Also Published As

Publication number Publication date
GB0219609D0 (en) 2002-10-02

Similar Documents

Publication Publication Date Title
US5630902A (en) Apparatus for use in high fidelty replication of diffractive optical elements
EP1597614B1 (en) High precision mirror, and a method of making it
DE602004021635D1 (en) METHOD FOR PRODUCING A COATED OPTICAL LENS WITHOUT VISIBLE FINE GRINDING LINES
US20050260343A1 (en) Methods for manufacturing large-scale plastic lenses
US11339468B2 (en) Magnetron sputtering scanning method for modifying silicon carbide optical reflector surface and improving surface profile
JPH0890586A (en) Plastic molded product
GB2040785A (en) Producing polymer glass asherical optical elements
JPH1148258A (en) Tool for molding diffraction surface of optical lens and its manufacture
EP0030765B1 (en) Polygonal rotary scanners
GB2392130A (en) Mould creation for high surface quality curved optical components
JPH07191207A (en) Reflection type composite optical element
US7722788B2 (en) Mold inserts
Parks Overview of optical manufacturing methods
CN114012944A (en) Manufacturing method of large Fresnel flat plate die
CN110941038B (en) Processing technology of Paul combined prism
JPH0486723A (en) Polyhedral mirror and production thereof
JP4345123B2 (en) Resin bonded optical element and manufacturing method thereof
CN1696744A (en) Method for preparing large plastic eyeglass
US6036873A (en) Process for generating precision polished non-plannar aspherical surfaces
WO2001084747A3 (en) Telescope mirror for high bandwidth free space optical data transmission
Ulph Fabrication of a metal-matrix composite mirror
CN214881148U (en) Novel cemented glass lens of high-end single lens
JPS6159413A (en) Rotary polygon mirror and its manufacture
Hizny Feasibility Of Replicated Optical Scanners
JPH08190007A (en) Optical reflection mirror and its production

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)