JPS4841565A - - Google Patents

Info

Publication number
JPS4841565A
JPS4841565A JP47094151A JP9415172A JPS4841565A JP S4841565 A JPS4841565 A JP S4841565A JP 47094151 A JP47094151 A JP 47094151A JP 9415172 A JP9415172 A JP 9415172A JP S4841565 A JPS4841565 A JP S4841565A
Authority
JP
Japan
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
JP47094151A
Other languages
Japanese (ja)
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 filed Critical
Publication of JPS4841565A publication Critical patent/JPS4841565A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3922—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations and measurement of the incident light
    • 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
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • 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
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/73—Controlling exposure by variation of spectral composition, e.g. multicolor printers

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
JP47094151A 1971-09-23 1972-09-21 Pending JPS4841565A (Direct)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18309471A 1971-09-23 1971-09-23

Publications (1)

Publication Number Publication Date
JPS4841565A true JPS4841565A (Direct) 1973-06-18

Family

ID=22671417

Family Applications (1)

Application Number Title Priority Date Filing Date
JP47094151A Pending JPS4841565A (Direct) 1971-09-23 1972-09-21

Country Status (6)

Country Link
US (1) US3700960A (Direct)
JP (1) JPS4841565A (Direct)
CA (1) CA1031407A (Direct)
DE (1) DE2246234A1 (Direct)
FR (1) FR2153366A1 (Direct)
NL (1) NL7212886A (Direct)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5828197A (ja) * 1981-07-28 1983-02-19 リ−・イレクトリツク（ライテイング）リミテツド ア−ク灯用電力供給装置
US5679942A (en) * 1993-08-27 1997-10-21 Kabushiki Kaisha Sankyo Seiki Seisakusho Magnetic card reader using two multi channel magnetic heads that can read magnetic track data in two separate and distinct directions

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2313997C3 (de) * 1973-03-21 1975-08-28 Intermadox Ag, Zug (Schweiz) Lichtelektrische Potentiometeranordnung unter Vermeidung beweglicher Strom Zuführungen
US3909609A (en) * 1973-10-29 1975-09-30 Xerox Corp Light source measuring apparatus
US3904922A (en) * 1973-11-19 1975-09-09 Xerox Corp Lamp control and lamp switch circuit
GB1449519A (en) * 1973-12-13 1976-09-15 Gunssons Sortex Ltd Light-sensitive sorting machine
US4012663A (en) * 1974-11-25 1977-03-15 General Electric Company Lighting control system
JPS5225484A (en) * 1975-08-21 1977-02-25 Mitsubishi Electric Corp Mixing light illuminating method
US4004188A (en) * 1975-09-26 1977-01-18 General Electric Company Starting circuit for inverter operated gaseous discharge lamps
JPS52104375A (en) * 1976-02-27 1977-09-01 Mitsubishi Electric Corp Illumination method by blended light
US4190795A (en) * 1977-09-09 1980-02-26 Coberly & Associates Constant intensity light source
US4360756A (en) * 1979-11-13 1982-11-23 General Electric Company Metal halide lamp containing ThI4 with added elemental cadmium or zinc
JPS61110996A (ja) * 1984-11-05 1986-05-29 株式会社日立製作所 高圧放電灯点灯装置
US4697709A (en) * 1985-09-03 1987-10-06 Delta Technology Corporation Sorter for agricultural products
US5333034A (en) * 1992-01-31 1994-07-26 Bremson Data Systems, Inc. System for selectively controlling the spectral make-up of visible light from a source thereof
US5581161A (en) * 1994-07-13 1996-12-03 Gong; Mingfu DC coupled electronic ballast with a larger DC and smaller AC signal
US6864642B2 (en) * 2002-10-07 2005-03-08 Bruce Industries, Inc. Electronic ballast with DC output flyback converter
US6879113B2 (en) * 2003-03-11 2005-04-12 Bruce Industries, Inc. Low frequency output electronic ballast

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749501A (en) * 1950-10-06 1956-06-05 California Packing Corp Photoelectric voltage regulator
US3431427A (en) * 1965-10-24 1969-03-04 Henry D Pahl Jr Solid state color balance controller for incandescent lamps

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5828197A (ja) * 1981-07-28 1983-02-19 リ−・イレクトリツク（ライテイング）リミテツド ア−ク灯用電力供給装置
US5679942A (en) * 1993-08-27 1997-10-21 Kabushiki Kaisha Sankyo Seiki Seisakusho Magnetic card reader using two multi channel magnetic heads that can read magnetic track data in two separate and distinct directions

Also Published As

Publication number Publication date
NL7212886A (Direct) 1973-03-27
DE2246234A1 (de) 1973-03-29
CA1031407A (en) 1978-05-16
FR2153366A1 (Direct) 1973-05-04
US3700960A (en) 1972-10-24

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