JPS5117452A - Furenerurenzu - Google Patents

Furenerurenzu

Info

Publication number
JPS5117452A
JPS5117452A JP8890174A JP8890174A JPS5117452A JP S5117452 A JPS5117452 A JP S5117452A JP 8890174 A JP8890174 A JP 8890174A JP 8890174 A JP8890174 A JP 8890174A JP S5117452 A JPS5117452 A JP S5117452A
Authority
JP
Japan
Prior art keywords
furenerurenzu
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.)
Pending
Application number
JP8890174A
Other languages
English (en)
Inventor
Ichiro Hosaka
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 JP8890174A priority Critical patent/JPS5117452A/ja
Priority to DE19752534483 priority patent/DE2534483A1/de
Publication of JPS5117452A publication Critical patent/JPS5117452A/ja
Pending 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0018—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
JP8890174A 1974-08-02 1974-08-02 Furenerurenzu Pending JPS5117452A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP8890174A JPS5117452A (ja) 1974-08-02 1974-08-02 Furenerurenzu
DE19752534483 DE2534483A1 (de) 1974-08-02 1975-08-01 Fresnel-linse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8890174A JPS5117452A (ja) 1974-08-02 1974-08-02 Furenerurenzu

Publications (1)

Publication Number Publication Date
JPS5117452A true JPS5117452A (ja) 1976-02-12

Family

ID=13955845

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8890174A Pending JPS5117452A (ja) 1974-08-02 1974-08-02 Furenerurenzu

Country Status (2)

Country Link
JP (1) JPS5117452A (ja)
DE (1) DE2534483A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52145238A (en) * 1976-05-28 1977-12-03 Ichirou Hosaka Method of making mold for fresnel lens
JPS56142501A (en) * 1980-04-08 1981-11-06 Matsushita Electric Ind Co Ltd Fresnel lens sheet
JPS61130903A (ja) * 1984-11-30 1986-06-18 Hitachi Ltd フレネルレンズとその製造方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU9501804D0 (en) * 1995-06-20 1995-08-28 Horvath Method and device for reducing diffuse lighting and changing distribution of the diffuse lighting rising in fresnel lenses
DE19737107C2 (de) * 1997-08-26 2001-02-08 Fresnel Optics Gmbh Optische Anordnung bestehend aus mindestens zwei Fresnellinsen und Projektions- bzw. Displayvorrichtung mit dieser Anordnung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52145238A (en) * 1976-05-28 1977-12-03 Ichirou Hosaka Method of making mold for fresnel lens
JPS56142501A (en) * 1980-04-08 1981-11-06 Matsushita Electric Ind Co Ltd Fresnel lens sheet
JPS626201B2 (ja) * 1980-04-08 1987-02-09 Matsushita Electric Ind Co Ltd
JPS61130903A (ja) * 1984-11-30 1986-06-18 Hitachi Ltd フレネルレンズとその製造方法
JPH0525081B2 (ja) * 1984-11-30 1993-04-09 Hitachi Ltd

Also Published As

Publication number Publication date
DE2534483A1 (de) 1976-02-12

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