JPS5754902A - Orthogonal double fresnel lens plate - Google Patents

Orthogonal double fresnel lens plate

Info

Publication number
JPS5754902A
JPS5754902A JP12913580A JP12913580A JPS5754902A JP S5754902 A JPS5754902 A JP S5754902A JP 12913580 A JP12913580 A JP 12913580A JP 12913580 A JP12913580 A JP 12913580A JP S5754902 A JPS5754902 A JP S5754902A
Authority
JP
Japan
Prior art keywords
grooves
fresnel lens
parallel lines
lens plate
right angles
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
JP12913580A
Other languages
Japanese (ja)
Inventor
Tokuji Suzuki
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.)
SAOTOME JIYUNKO
Original Assignee
SAOTOME JIYUNKO
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 SAOTOME JIYUNKO filed Critical SAOTOME JIYUNKO
Priority to JP12913580A priority Critical patent/JPS5754902A/en
Publication of JPS5754902A publication Critical patent/JPS5754902A/en
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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

PURPOSE:To increase the intensity of light on the focal plane, by forming a Fresnel lens having grooves of orthogonal parallel lines on the surface and the reverse side, or doubling two Fresnel lenses having grooves of parallel lines on one surface so that the grooves meet at right angles. CONSTITUTION:A Fresnel lens plate 1 having grooves A, B, C... of parallel lines notched on the surface of an acryl plate, etc. is doubled so that the grooves meet at right angles with each other, or a Fresnel lens 2 having grooves A', B', C'... and P, Q, R... of parallel lines notched so as to meet at right angles with each other on both the surface and the reverse side is formed. In this way, the intensity of light on the focal plane is increased.
JP12913580A 1980-09-19 1980-09-19 Orthogonal double fresnel lens plate Pending JPS5754902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12913580A JPS5754902A (en) 1980-09-19 1980-09-19 Orthogonal double fresnel lens plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12913580A JPS5754902A (en) 1980-09-19 1980-09-19 Orthogonal double fresnel lens plate

Publications (1)

Publication Number Publication Date
JPS5754902A true JPS5754902A (en) 1982-04-01

Family

ID=15001969

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12913580A Pending JPS5754902A (en) 1980-09-19 1980-09-19 Orthogonal double fresnel lens plate

Country Status (1)

Country Link
JP (1) JPS5754902A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5973728U (en) * 1982-11-10 1984-05-18 キヤノン株式会社 flashlight device
US4936657A (en) * 1985-07-18 1990-06-26 Asahi Kogaku Kogyo Kabushiki Kaisha Projection type liquid-crystal video display device using a fresnel lens
US5040883A (en) * 1989-10-30 1991-08-20 Minnesota Mining And Manufacturing Company Light fixture with beam shaping lens

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5973728U (en) * 1982-11-10 1984-05-18 キヤノン株式会社 flashlight device
JPH0121294Y2 (en) * 1982-11-10 1989-06-26
US4936657A (en) * 1985-07-18 1990-06-26 Asahi Kogaku Kogyo Kabushiki Kaisha Projection type liquid-crystal video display device using a fresnel lens
US5040883A (en) * 1989-10-30 1991-08-20 Minnesota Mining And Manufacturing Company Light fixture with beam shaping lens

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