IT1066189B - PROCEDURE AND MOLD FOR MANUFACTURING A LENS ELEMENT FOR A PROJECTOR - Google Patents

PROCEDURE AND MOLD FOR MANUFACTURING A LENS ELEMENT FOR A PROJECTOR

Info

Publication number
IT1066189B
IT1066189B IT51327/76A IT5132776A IT1066189B IT 1066189 B IT1066189 B IT 1066189B IT 51327/76 A IT51327/76 A IT 51327/76A IT 5132776 A IT5132776 A IT 5132776A IT 1066189 B IT1066189 B IT 1066189B
Authority
IT
Italy
Prior art keywords
projector
mold
procedure
manufacturing
lens element
Prior art date
Application number
IT51327/76A
Other languages
Italian (it)
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Application granted granted Critical
Publication of IT1066189B publication Critical patent/IT1066189B/en

Links

Classifications

    • 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
    • B29D11/00278—Lenticular sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Milling Processes (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
IT51327/76A 1975-09-20 1976-09-17 PROCEDURE AND MOLD FOR MANUFACTURING A LENS ELEMENT FOR A PROJECTOR IT1066189B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB38691/75A GB1546805A (en) 1975-09-20 1975-09-20 Method of manufacturing a mould for producing a lens element and mould manufactured by that method

Publications (1)

Publication Number Publication Date
IT1066189B true IT1066189B (en) 1985-03-04

Family

ID=10405091

Family Applications (1)

Application Number Title Priority Date Filing Date
IT51327/76A IT1066189B (en) 1975-09-20 1976-09-17 PROCEDURE AND MOLD FOR MANUFACTURING A LENS ELEMENT FOR A PROJECTOR

Country Status (9)

Country Link
JP (2) JPS5835805B2 (en)
AU (1) AU500878B2 (en)
BR (1) BR7606187A (en)
DE (1) DE2641615C2 (en)
ES (1) ES451681A1 (en)
FR (1) FR2324436A1 (en)
GB (1) GB1546805A (en)
IN (1) IN146506B (en)
IT (1) IT1066189B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4332438A (en) * 1979-03-23 1982-06-01 Lucas Industries Limited Lens element
JPS58179702U (en) * 1982-05-27 1983-12-01 株式会社小糸製作所 vehicle headlights
DE3527804A1 (en) * 1985-08-02 1987-02-05 Bosch Gmbh Robert Headlamp, in particular working headlamp for vehicles
AT386080B (en) * 1986-03-07 1988-06-27 Futuritwerk Ag LIGHT SPREADER FOR INTENSITY DISTRIBUTION OF LIGHT
JP2603098B2 (en) * 1988-04-08 1997-04-23 株式会社小糸製作所 Processing method of Fresnel step
JPH01257504A (en) * 1988-04-08 1989-10-13 Koito Mfg Co Ltd Machining method for fresnel step
US6491481B1 (en) * 2000-10-31 2002-12-10 Eastman Kodak Company Method of making a precision microlens mold and a microlens mold
US6402996B1 (en) * 2000-10-31 2002-06-11 Eastman Kodak Company Method of manufacturing a microlens and a microlens array
US6476971B1 (en) * 2000-10-31 2002-11-05 Eastman Kodak Company Method of manufacturing a microlens array mold and a microlens array
FR2849157B1 (en) * 2002-12-20 2015-07-10 Valeo Vision DEVICE FOR LIGHTING AND / OR SIGNALING THE PROJECTOR OR FIRE TYPE FOR A MOTOR VEHICLE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2137079A (en) * 1935-11-22 1938-11-15 Gen Motors Corp Lens
US2890627A (en) * 1950-03-04 1959-06-16 Gen Motors Corp Method for making lens mold
GB1387589A (en) * 1971-08-06 1975-03-19 Lucas Electrical Co Ltd Lenses
JPS5251518Y2 (en) * 1972-10-17 1977-11-22
JPS49151274U (en) * 1973-04-30 1974-12-27

Also Published As

Publication number Publication date
DE2641615C2 (en) 1984-05-17
AU1782776A (en) 1978-03-23
JPS5835805B2 (en) 1983-08-05
FR2324436B1 (en) 1979-01-19
JPS58181512A (en) 1983-10-24
AU500878B2 (en) 1979-06-07
IN146506B (en) 1979-06-23
JPS5239713A (en) 1977-03-28
GB1546805A (en) 1979-05-31
FR2324436A1 (en) 1977-04-15
ES451681A1 (en) 1977-11-16
BR7606187A (en) 1977-06-14
DE2641615A1 (en) 1977-03-31

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