US 12,192,610 B2
Imaging device with illumination unit featuring light shielding component
Takao Ushiyama, Aichi (JP); and Eiji Takahashi, Aichi (JP)
Assigned to KOWA COMPANY, LTD., Nagoya (JP)
Appl. No. 18/007,618
Filed by KOWA COMPANY, LTD., Nagoya (JP)
PCT Filed Jun. 2, 2021, PCT No. PCT/JP2021/020932
§ 371(c)(1), (2) Date Dec. 1, 2022,
PCT Pub. No. WO2021/246430, PCT Pub. Date Dec. 9, 2021.
Claims priority of application No. 2020-096600 (JP), filed on Jun. 3, 2020.
Prior Publication US 2023/0353854 A1, Nov. 2, 2023
Int. Cl. H04N 23/56 (2023.01); G02B 3/00 (2006.01); G02B 13/00 (2006.01); G02B 19/00 (2006.01); G03B 17/12 (2021.01); H04N 23/55 (2023.01)
CPC H04N 23/56 (2023.01) [G02B 3/0075 (2013.01); G02B 13/0015 (2013.01); G02B 19/0047 (2013.01); G03B 17/12 (2013.01); H04N 23/55 (2023.01)] 8 Claims
OG exemplary drawing
 
1. An imaging device comprising:
an illumination unit including a light source for emitting illumination light, and a lens group for irradiating an imaging object with the illumination light emitted from the light source; and
an imaging unit for imaging the imaging object, wherein the illumination unit is provided with a light shielding component for shielding against a part of the illumination light emitted from the light source;
wherein the illumination unit includes, in the lens group, a condenser lens for converging the illumination light from the light source, and an illumination system lens for irradiating the imaging object with the illumination light transmitted through the condenser lens; and
a position which is optically conjugated with the imaging object is set in an intermediate portion between the condenser lens and the illumination system lens, and the condenser lens includes a plurality of lenses; and
the light shielding component is arranged between the plurality of lenses constituting the condenser lens in no contact with the surfaces of the plurality of lenses.