GB2332638B - Process for producing a doubly convex lens screen - Google Patents

Process for producing a doubly convex lens screen

Info

Publication number
GB2332638B
GB2332638B GB9827821A GB9827821A GB2332638B GB 2332638 B GB2332638 B GB 2332638B GB 9827821 A GB9827821 A GB 9827821A GB 9827821 A GB9827821 A GB 9827821A GB 2332638 B GB2332638 B GB 2332638B
Authority
GB
United Kingdom
Prior art keywords
producing
convex lens
lens screen
doubly convex
doubly
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 - Fee Related
Application number
GB9827821A
Other versions
GB9827821D0 (en
GB2332638A (en
Inventor
Peter Schlechtingen
Michael Helker
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.)
ITOS GmbH
Gebrueder Merten GmbH and Co KG
Original Assignee
ITOS GmbH
Gebrueder Merten GmbH and Co KG
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 ITOS GmbH, Gebrueder Merten GmbH and Co KG filed Critical ITOS GmbH
Publication of GB9827821D0 publication Critical patent/GB9827821D0/en
Publication of GB2332638A publication Critical patent/GB2332638A/en
Application granted granted Critical
Publication of GB2332638B publication Critical patent/GB2332638B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/30—Mounting, exchanging or centering
    • B29C33/301—Modular mould systems [MMS], i.e. moulds built up by stacking mould elements, e.g. plates, blocks, rods
    • B29C33/302—Assembling a large number of mould elements to constitute one cavity
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • 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
    • B29D11/00269—Fresnel lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0012—Arrays characterised by the manufacturing method
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0043—Inhomogeneous or irregular arrays, e.g. varying shape, size, height
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Overhead Projectors And Projection Screens (AREA)
GB9827821A 1997-12-24 1998-12-17 Process for producing a doubly convex lens screen Expired - Fee Related GB2332638B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1997157836 DE19757836C1 (en) 1997-12-24 1997-12-24 Process for the production of a double convex lens shade and mandrel for the production of this lens shade

Publications (3)

Publication Number Publication Date
GB9827821D0 GB9827821D0 (en) 1999-02-10
GB2332638A GB2332638A (en) 1999-06-30
GB2332638B true GB2332638B (en) 1999-12-15

Family

ID=7853358

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9827821A Expired - Fee Related GB2332638B (en) 1997-12-24 1998-12-17 Process for producing a doubly convex lens screen

Country Status (2)

Country Link
DE (1) DE19757836C1 (en)
GB (1) GB2332638B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6678097B2 (en) * 2001-05-04 2004-01-13 Honeywell International Inc. Non-planar fresnel reflector arrays, mold structures and mold patterns for eliminating negative draft during molding
DE10345696A1 (en) * 2003-10-01 2005-05-25 Perkinelmer Optoelectronics Gmbh & Co.Kg Optical sensor e.g. for reproduction of radiation sensor, for illustrating radiation from several ranges, has subspace positioned on radiation-sensitive range of sensor having several distinguishable sweep ranges
WO2008153435A1 (en) * 2007-06-15 2008-12-18 Zakrytoe Aktsionernoe Obschestvo 'technoexan' Method for producing a composite concentrator lens panel for photovoltaic modules
FR2945109B1 (en) * 2009-05-04 2012-10-19 Jean Xavier Marie Herzog HORIZONTAL OPTICAL SOLAR SENSOR SYSTEM ELECTRO-THERMO GENERATOR
DE102011015405A1 (en) 2011-03-29 2012-10-04 Osram Opto Semiconductors Gmbh Optical element and radiation-emitting device with such an optical element
NL2013075B1 (en) 2014-06-26 2016-07-11 Zamqua Holding B V Mold for forming a hollow body and inflatable body.
WO2016076749A1 (en) * 2014-11-14 2016-05-19 Михаил Алексеевич ФИЛИМОНОВ Device for visually displaying information
DE112020001104T5 (en) 2019-03-07 2021-12-30 Omron Corporation METHOD FOR PRODUCING A LIGHT GUIDE PLATE, A LIGHT GUIDE PLATE AND A LIGHTING DEVICE FOR VEHICLES

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0177130A1 (en) * 1984-09-25 1986-04-09 Matsushita Electric Works, Ltd. Passive infrared detector
GB2173013A (en) * 1985-03-29 1986-10-01 Philips Electronic Associated Arrays of lenses

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4414078A1 (en) * 1994-04-22 1995-10-26 Merten Gmbh & Co Kg Geb Infrared motion detector for mounting on wall or ceiling of building
DE4428628A1 (en) * 1994-08-12 1996-02-15 Merten Gmbh & Co Kg Geb Infrared motion detector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0177130A1 (en) * 1984-09-25 1986-04-09 Matsushita Electric Works, Ltd. Passive infrared detector
GB2173013A (en) * 1985-03-29 1986-10-01 Philips Electronic Associated Arrays of lenses

Also Published As

Publication number Publication date
DE19757836C1 (en) 1999-10-07
GB9827821D0 (en) 1999-02-10
GB2332638A (en) 1999-06-30

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20171217