Title:
OPTICAL SYSTEM FOR SOLAR LIGHT COLLECTION, AND SOLAR LIGHT COLLECTION SYSTEM
Document Type and Number:
Japanese Patent JP2014035803
Kind Code:
A
Abstract:
To provide an optical system for solar light collection that has high efficiency despite a compact size and a solar light collection system that can track the sun with a simple structure.
Once solar light has been collected by a condenser lens L1 with a large NA, NA is reduced with a divergent lens L2 and solar light is made incident in an optical fiber and/or an optical fiber bundle serving as a light guide system. Thus, a length of an optical system can be reduced by a difference Δ of light collection positions while setting a final incident light flux with NA falling in a range from 0.2 to 0.3, thereby allowing reduction in the thickness of a frame of the entire lighting system and thus enabling reduction in size and cost.
Inventors:
HOSOE HIDE
ISHIDA HIROFUMI
TANNAI OSAMU
KOBAYASHI DAISUKE
ISHIDA HIROFUMI
TANNAI OSAMU
KOBAYASHI DAISUKE
Application Number:
JP2012174768A
Publication Date:
February 24, 2014
Filing Date:
August 07, 2012
Export Citation:
Assignee:
KONICA MINOLTA INC
International Classes:
F21S11/00; F21V8/00; F21V29/00
Attorney, Agent or Firm:
Keijiro Tamura
Kenichi Kobayashi
Kenichi Kobayashi
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