Title:
OPTICAL SYSTEM DEVICE, AND DOUBLE-CONVEX LENS
Document Type and Number:
Japanese Patent JP2018189958
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an optical system device and a double-convex lens that collimate irradiation light with more space saving, and equalize illuminance on an irradiation surface by the irradiation light.SOLUTION: An optical system device 1, parallelizes irradiation light irradiated from a light source, and equalizes illuminance on an irradiation surface by the irradiation light, comprises: a double-convex lens 20 that is provided in an irradiation direction of the irradiation light, and has a first surface 21 located at an incidence side in the irradiation direction, and a second surface 22 located at an emission side in the irradiation direction, the double-convex lens 20 in which the second surface 22 is formed into a radius collimating incident irradiation light, and the first surface 21 is formed into a radius of curvature equalizing illuminance on an irradiation surface by irradiation light emitted by the second surface 22,; and an aperture 30 that is arranged between the light source and the double-convex lens 20, and causes a part of the irradiation light to pass therethrough.SELECTED DRAWING: Figure 2
Inventors:
OKAWA TAKASHI
Application Number:
JP2018084991A
Publication Date:
November 29, 2018
Filing Date:
April 26, 2018
Export Citation:
Assignee:
KANTUM ELECTRONICS CO LTD
International Classes:
G02B13/00; F21S2/00; F21V5/04; F21V9/08; F21V11/08; G02B3/00; G02B13/14; G02B19/00
Domestic Patent References:
| JPH09230233A | 1997-09-05 | |||
| JP2011164158A | 2011-08-25 | |||
| JP2013246255A | 2013-12-09 | |||
| JP2011145387A | 2011-07-28 | |||
| JP2011095326A | 2011-05-12 |
Foreign References:
| WO2015152161A1 | 2015-10-08 | |||
| WO2016042642A1 | 2016-03-24 |
Attorney, Agent or Firm:
Hideo Akazawa