Acoustic wave detector and acoustic wave measurement apparatus
First Claim
1. An acoustic wave detector for detecting an acoustic wave generated by light emitted onto a subject, comprising:
- a transducer; and
a light reflecting member which is positioned between said transducer and a subject surface that is irradiated with the light, and which reflects scattered light on the subject surface, whereinsaid light reflecting member includes a first reflecting surface and a second reflecting surface positioned closer to said transducer than said first reflecting surface, andsaid first reflecting surface and said second reflecting surface are disposed such that a distance between said first reflecting surface and said second reflecting surface is a predetermined length equal to an odd multiple of a half wavelength of a predetermined wavelength, said predetermined wavelength being within a detection bandwidth of said transducer and included in an acoustic wave generated from said light reflecting member by the scattered light.
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Accused Products
Abstract
An acoustic wave detector includes: a transducer; and a light reflecting member which is positioned between the transducer and a subject surface that is irradiated with the light, and which reflects scattered light on the subject surface. The light reflecting member includes a first reflecting surface and a second reflecting surface positioned closer to the transducer than the first reflecting surface, and a distance between the first reflecting surface and the second reflecting surface is an odd multiple of a half wavelength of a predetermined wavelength included in an acoustic wave generated from the light reflecting member by the scattered light.
3 Citations
16 Claims
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1. An acoustic wave detector for detecting an acoustic wave generated by light emitted onto a subject, comprising:
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a transducer; and a light reflecting member which is positioned between said transducer and a subject surface that is irradiated with the light, and which reflects scattered light on the subject surface, wherein said light reflecting member includes a first reflecting surface and a second reflecting surface positioned closer to said transducer than said first reflecting surface, and said first reflecting surface and said second reflecting surface are disposed such that a distance between said first reflecting surface and said second reflecting surface is a predetermined length equal to an odd multiple of a half wavelength of a predetermined wavelength, said predetermined wavelength being within a detection bandwidth of said transducer and included in an acoustic wave generated from said light reflecting member by the scattered light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An acoustic wave measurement apparatus comprising:
- an acoustic wave detector for detecting an acoustic wave generated by light emitted onto a subject; and
a signal processing device for obtaining information relating to an interior of the subject from the acoustic wave detected by said acoustic wave detector, wherein said acoustic wave detector comprises; a transducer; and a light reflecting member which is positioned between said transducer and a subject surface that is irradiated with the light, and which reflects scattered light on the subject surface, wherein said light reflecting member includes a first reflecting surface and a second reflecting surface positioned closer to said transducer than said first reflecting surface, and wherein said first reflecting surface and said second reflecting surface are disposed such that a distance between said first reflecting surface and said second reflecting surface is a predetermined length equal to an odd multiple of a half wavelength of a predetermined wavelength, said predetermined wavelength being within a detection bandwidth of said transducer and included in an acoustic wave generated from said light reflecting member by the scattered light.
- an acoustic wave detector for detecting an acoustic wave generated by light emitted onto a subject; and
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10. An acoustic wave detector for detecting an acoustic wave generated by light emitted onto a subject, comprising:
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a transducer; and a light reflecting member which is positioned between said transducer and a subject surface that is irradiated with the light, and which reflects scattered light on the subject surface, wherein said light reflecting member includes a first reflecting surface and a second reflecting surface positioned closer to said transducer than said first reflecting surface, and an optical reflectance of said first reflecting surface is smaller than an optical reflectance of said second reflecting surface. - View Dependent Claims (11, 12)
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13. An acoustic wave detector for detecting an acoustic wave generated by light emitted onto a subject, comprising:
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a transducer; and a light reflecting member which is positioned between said transducer and a subject surface that is irradiated with the light, and which reflects scattered light on the subject surface, wherein said light reflecting member includes a first reflecting surface and a second reflecting surface positioned closer to said transducer than said first reflecting surface, said first reflecting surface and said second reflecting surface respectively include a reflection region that reflects light and an open region that transmits light, and a projected image obtained when said reflection region of said first reflecting surface is projected onto said second reflecting surface does not overlap said reflection region of said second reflecting surface. - View Dependent Claims (14, 15, 16)
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Specification