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Title:
OPTICAL SYSTEM DEVICE AND BICONVEX LENS
Document Type and Number:
WIPO Patent Application WO/2020/070859
Kind Code:
A1
Abstract:
An optical system device 1 for attaining parallelization of irradiation light emitted from a light source and uniformity in illuminance at an irradiation surface by the irradiation light is provided with: a biconvex lens 20 which is provided in the irradiation direction of the irradiation light, the lens having a first surface 21 positioned on the light entering side in the irradiation direction and having a second surface 22 positioned on the light exit side in the irradiation direction, wherein the second surface 22 is formed to have a curvature radius that enables parallelization of irradiation light having entered the surface and the first surface 21 is formed to have a curvature radius that achieves uniformity in the illuminance at the irradiation surface by the irradiation light having exited from the second surface 22; and an aperture 30 which is disposed between the light source and the biconvex lens 20 and through which the irradiation light is partially passed.

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Inventors:
OKAWA TAKAFUMI (JP)
Application Number:
PCT/JP2018/037207
Publication Date:
April 09, 2020
Filing Date:
October 04, 2018
Export Citation:
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Assignee:
KANTUM USHIKATA CO LTD (JP)
International Classes:
G02B19/00; G03F7/20
Foreign References:
JP2010519579A2010-06-03
JP2002341246A2002-11-27
JP2013077482A2013-04-25
Attorney, Agent or Firm:
AKAZAWA, Hideo (JP)
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