Patent ID: 9459138
Filing Date: 2016-10-04
CPC Classification: A61B,B06B,G01H

Claim Text:
1. An ultrasonic transducer comprising: a light-absorbing layer configured to absorb light incident on the light-absorbing layer and to generate heat based on the absorbed light; and a thermoelastic layer which is disposed on the light-absorbing layer, the thermoelastic layer being formed of a material different from a material of the light-absorbing layer, the thermoelastic layer being configured to thermally expand based on the heat to generate ultrasonic waves, wherein an absorption coefficient of the light-absorbing layer is higher than an absorption coefficient of the thermoelastic layer, wherein a reflection coefficient of the light-absorbing layer is lower than a reflection coefficient of the thermoelastic layer, and wherein the light-absorbing layer comprises graphene.