JPS5774713A - Condenser - Google Patents

Condenser

Info

Publication number
JPS5774713A
JPS5774713A JP15168080A JP15168080A JPS5774713A JP S5774713 A JPS5774713 A JP S5774713A JP 15168080 A JP15168080 A JP 15168080A JP 15168080 A JP15168080 A JP 15168080A JP S5774713 A JPS5774713 A JP S5774713A
Authority
JP
Japan
Prior art keywords
light
condenser
diameter part
smallest
refractive index
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
JP15168080A
Other languages
Japanese (ja)
Inventor
Noriomi Miyoshi
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Fuji Electric Manufacturing Co 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 Fuji Electric Co Ltd, Fuji Electric Manufacturing Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP15168080A priority Critical patent/JPS5774713A/en
Publication of JPS5774713A publication Critical patent/JPS5774713A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide

Abstract

PURPOSE:To condense light to small area (of optical fiber, etc.) efficiently without leaking light out, by decreasing the refractive index of a condenser, which is sectioned circularly and decreases in diameter lengthwise, from the center of the area to the circumference. CONSTITUTION:Light is emitted from the largest-diameter part 2L of a circularly sectioned condenser 2 having the distribution that the refractive index IR-1 of the section S-1 decreases from its center part to the circumferential part. Light approaching the flank of the condenser 2 increases light in velocity rapidly and is bent to the center axis of the condenser 2 at any time. Therefore, light traveling from the largest-diameter part 2L to the smallest-diameter part 2S, while waving as shown by the solid line, reaches the smallest-diameter part 2S without leaking out. AY this time, when the refractive index decreases to the smallest-diameter part even lengthwise, the leakage of light is further decreased.
JP15168080A 1980-10-29 1980-10-29 Condenser Pending JPS5774713A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15168080A JPS5774713A (en) 1980-10-29 1980-10-29 Condenser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15168080A JPS5774713A (en) 1980-10-29 1980-10-29 Condenser

Publications (1)

Publication Number Publication Date
JPS5774713A true JPS5774713A (en) 1982-05-11

Family

ID=15523900

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15168080A Pending JPS5774713A (en) 1980-10-29 1980-10-29 Condenser

Country Status (1)

Country Link
JP (1) JPS5774713A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62195601A (en) * 1985-09-20 1987-08-28 Nissho Giken Kk Optical direction converter
EP0571088A3 (en) * 1992-04-24 1995-01-18 Sharp Kk A lighting device and a projection type image display system using the same.
JP2017137000A (en) * 2016-02-04 2017-08-10 テイ・エス テック株式会社 Luminaire

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62195601A (en) * 1985-09-20 1987-08-28 Nissho Giken Kk Optical direction converter
JPH0564763B2 (en) * 1985-09-20 1993-09-16 Nitsusho Giken Kk
EP0571088A3 (en) * 1992-04-24 1995-01-18 Sharp Kk A lighting device and a projection type image display system using the same.
US5459592A (en) * 1992-04-24 1995-10-17 Sharp Kabushiki Kaisha Projection display system including a collimating tapered waveguide or lens with the normal to optical axis angle increasing toward the lens center
JP2017137000A (en) * 2016-02-04 2017-08-10 テイ・エス テック株式会社 Luminaire

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