Title:
LENS UNIT AND LIGHT IRRADIATION DEVICE INCLUDING THE SAME
Document Type and Number:
Japanese Patent JP2020177132
Kind Code:
A
Abstract:
To provide a lens unit capable of simultaneously imaging a plurality of spot lights having an illuminance distribution equalized to an irradiation surface.SOLUTION: A lens unit comprises: a first lens array 25 using a light flux incident from a light source as a plurality of secondary light sources corresponding to the number of arrays; a second lens array 27 guiding the light flux from the plurality of secondary light sources to an integrator lens 28; and the integrator lens for gathering the light flux passing through the same region in each lens element of the second lens array to the corresponding same region on an irradiation plane 29. The first lens array having the number of arrays further divided in each lens element of the second lens array is arranged on the side of the light source in the optical axis direction from a position of a plane conjugate with the irradiation plane.SELECTED DRAWING: Figure 4
Inventors:
SHIMOURA ATSUSHI
Application Number:
JP2019079239A
Publication Date:
October 29, 2020
Filing Date:
April 18, 2019
Export Citation:
Assignee:
V TECH CO LTD
International Classes:
G03F7/20; G02B3/00; G02B19/00; G02B27/18; H01L21/20; H01L21/268
Attorney, Agent or Firm:
Kinoshita Shigeru
Yuko Sawada
Yuko Sawada