Title:
LIGHT PROJECTION UNIT
Document Type and Number:
Japanese Patent JP2017022035
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a light projection unit which can improve utilization efficiency of light from a light source, and which can easily array a plurality of light projection elements at predetermined positions while performing positioning adjustment with high accuracy so as to project light to a specific range on a surface to be radiated respectively.SOLUTION: A light projection element includes a tapered light guide body, and a light projection lens continuously provided on an emission surface of the tapered light guide body. The light projection lens is partitioned in a solid manner by a lens incident surface, a lens surface of a predetermined curvature, and a lens outside surface. In the light projection lens, the lens outside surface is arranged in such a manner that a cross section in the direction orthogonal to an optical axis is larger than a cross section of a luminous flux of the light emitting from the emission surface of the tapered light guide body across the whole length in the optical axis direction of the light projection lens, and the optical axis of each light projection element is set so that each light projection element projects light to a specific region on a surface to be radiated, by the lens outside surfaces adjacent to each other of the light projection element being connected with each other.SELECTED DRAWING: Figure 1
Inventors:
YAMAKAWA AKIO
Application Number:
JP2015139993A
Publication Date:
January 26, 2017
Filing Date:
July 13, 2015
Export Citation:
Assignee:
NISSEI TECH CORP
International Classes:
F21S8/10; F21S2/00; F21V8/00; G02B19/00; H01L33/00
Attorney, Agent or Firm:
Minoru Omaki
Previous Patent: 情報処理装置、情報処理方法、及び、情報処理プログラム
Next Patent: METAL-AIR BATTERY ELECTROLYTE AND METAL-AIR BATTERY
Next Patent: METAL-AIR BATTERY ELECTROLYTE AND METAL-AIR BATTERY