公开(公告)号：US12279821B2

公开(公告)日：2025-04-22

申请号：US17312835

申请日：2019-12-11

Applicant: HOYA LENS THAILAND LTD.

Inventor： Takashi Iizuka

IPC: A61B3/103 ,  A61B3/00

Abstract: A refractive property measurement apparatus to measure refractive properties of an eye includes: a disk provided with a first pinhole and a second pinhole that transmit light rays while narrowing them; a light emitting unit that emits a first light ray and a second light ray from different positions on a surface of the disk, so that light rays passed through the first pinhole and the second pinhole enter the eye; and a processing unit determines refractive properties of the eye from information of positions on a retina of the eye where the first light ray having passed through the first pinhole and the second light ray having passed through the second pinhole reach. The first pinhole includes a first optical element that transmits the first light ray, and the second pinhole includes a second optical element that has transmission characteristics of transmitting the second light ray.

公开(公告)号：US12245814B2

公开(公告)日：2025-03-11

申请号：US17485873

申请日：2021-09-27

Applicant: HOYA LENS THAILAND LTD.

Inventor： Takashi Iizuka

IPC: A61B3/00 ,  A61B3/15 ,  G01N21/41

Abstract: A refraction measuring apparatus measures refractive properties of an eye by two light bundles respectively passing through two apertures, the apparatus including: a first rotational member, rotatably supported about a first rotational center, provided with the two apertures on either side of the first rotational center; a second rotational member, rotatably supported about a second rotational center, provided with a light-transmission portion(s) and a light-shielding portion at different rotational-direction positions. When the first rotational member is rotated, the second rotational member rotates, and while an aperture arrangement direction of the two apertures changes in accordance with the rotation of the second rotational member, a light-transmission state is entered, in which the light-transmission portion coincides with the two apertures to allow the two light bundles to pass through, or a light-shielding state is entered, in which the light-shielding portion coincides with the two apertures to shield the two light bundles.