Patent ID: 9456789
Filing Date: 2016-10-04
CPC Classification: A61B

Claim Text:
1. An object information acquisition apparatus comprising: a holding member configured to hold an object; an irradiation member configured to irradiate the object with light from a light source through the holding member; an acoustic wave detection unit configured to receive an acoustic wave generated in the object by the light and to convert the acoustic wave into an electrical signal; a processing unit configured to acquire information in the object by using the electrical signal from the acoustic wave detection unit; a light diffusion member configured to be arranged on the holding member; and an imaging unit configured to capture an optical pattern formed when the light diffusion member is irradiated with the light, wherein a light emission position of the irradiation member and the light diffusion members are movable relative to each other by moving the holding member, and a distance between the light emission position of the irradiation member and the light diffusion member is changed by relative movement of the light emission position of the irradiation member and the light diffusion member, and wherein the imaging unit is configured to be capable of adjusting a focus according to the distance between the light emission position of the irradiation member and the light diffusion member by keeping a distance between the imaging unit and the light diffusion member constant.