Incoherentized High-brightness White Light Generated Using Blue Laser Diodes and Phosphors—Effect of Multiple Scattering—

• Ikeda Yoshihisa

  Technology Development Division, Research & Development Centre, Toshiba Lighting & Technology Corporation

• Takeda Yuji

  Technology Development Division, Research & Development Centre, Toshiba Lighting & Technology Corporation

• Ueno Misaki

  Technology Development Division, Research & Development Centre, Toshiba Lighting & Technology Corporation

• Matsuba Yoshiaki

  Technology Development Division, Research & Development Centre, Toshiba Lighting & Technology Corporation

• Heike Atsushi

  Technology Development Division, Research & Development Centre, Toshiba Lighting & Technology Corporation

• Kawasaki Yoji

  Technology Development Division , Toshiba Lighting & Technology Corporation

• Kinoshita Junichi

  Technology Development Division , Toshiba Lighting & Technology Corporation

書誌事項

タイトル別名

• Incoherentized High-brightness White Light Generated Using Blue Laser Diodes and Phosphors—Effect of Multiple Scattering—
• Incoherentized high-brightness white light generated using blue laser diodes and phosphors -effect of multiple scattering

抄録

A new type of 4000–5000 lm-class white lamp system using high-power blue laser diodes and phosphors has been developed for high-luminance lighting applications. Using fibre-optics, the lamps can be arranged separately from a light engine containing the blue laser diodes. One of the new lamp systems achieved much higher luminance of 140 Mcd/m² than the conventional white LEDs. Their lighting quality and safety categorization have been discussed based on speckle contrast as an index of coherence. Speckle contrast values less than 2% as low as the LEDs have been obtained, implying that these lamps are considered to be incoherent as well as the conventional white LEDs. Multiple scattering processes in the lamp structure including the phosphor layer are found to be indispensable for reducing speckle contrast completely, adding to multi-longitudinal mode operation of the blue laser diodes.

収録刊行物

• Journal of Light & Visual Environment

  Journal of Light & Visual Environment 37 (2_3), 95-100, 2013

  一般社団法人 照明学会

キーワード

• laser diode
• solid-state lighting
• speckle contrast
• high-brightness lamp
• eye-safety

詳細情報

• CRID: 1390282679594901760
• NII論文ID: 130004439752
• DOI: 10.2150/jlve.ieij130000499
• ISSN: 13498398
• ISSN: 03878805
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可