US 12,186,020 B2
Ophthalmological device
Zhenguo Wang, Ridgewood, NJ (US); Zaixing Mao, Harrison, NJ (US); Kazuhiro Oomori, Tokyo (JP); and Makoto Fujino, Tokyo (JP)
Assigned to Topcon Corporation, Tokyo (JP)
Appl. No. 17/594,552
Filed by Topcon Corporation, Tokyo (JP)
PCT Filed Apr. 24, 2020, PCT No. PCT/JP2020/017833
§ 371(c)(1), (2) Date Oct. 21, 2021,
PCT Pub. No. WO2020/218576, PCT Pub. Date Oct. 29, 2020.
Claims priority of provisional application 62/837,992, filed on Apr. 24, 2019.
Claims priority of provisional application 62/837,914, filed on Apr. 24, 2019.
Claims priority of provisional application 62/837,900, filed on Apr. 24, 2019.
Claims priority of provisional application 62/837,844, filed on Apr. 24, 2019.
Prior Publication US 2022/0175247 A1, Jun. 9, 2022
Int. Cl. A61B 3/15 (2006.01); A61B 3/12 (2006.01)
CPC A61B 3/152 (2013.01) [A61B 3/12 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An ophthalmologic apparatus, comprising:
an objective lens that faces a subject's eye;
an alignment light emitting unit that irradiates the subject's eye with alignment light to perform measurement of alignment between the objective lens and the subject's eye;
an alignment reflection light receiving unit that receives alignment reflection light, which is a reflection of the alignment light from the subject's eye;
an anterior segment camera that receives corneal reflection light; and
a holder positioned between the anterior segment camera and the objective lens to hold the anterior segment camera, wherein
the holder includes an imaging transmissive portion that transmits the corneal reflection light to the anterior segment camera, a first light-transmissive portion that transmits the alignment light from the alignment light emitting unit, and a second light-transmissive portion that transmits the alignment reflection light from the subject's eye, wherein the apparatus is further configured such that:
the alignment light passes the first light-transmissive portion and enters a corneal surface of the subject's eye in an oblique direction relative to the corneal surface via the objective lens,
the alignment reflection light passes the second light-transmissive portion and is received by the alignment reflection light receiving unit, via the objective lens,
the imaging transmissive portion and the anterior segment camera are arranged along a direction of an optical axis of the objective lens, and
the corneal reflection light enters the objective lens, passes the imaging transmissive portion and is received by the anterior segment camera.