US 12,245,846 B2
Scattered light signal measuring apparatus and information processing apparatus
Yoshihiro Wakita, Tokyo (JP)
Assigned to SONY CORPORATION, Tokyo (JP)
Appl. No. 17/048,433
Filed by SONY CORPORATION, Tokyo (JP)
PCT Filed Apr. 5, 2019, PCT No. PCT/JP2019/015112
§ 371(c)(1), (2) Date Oct. 16, 2020,
PCT Pub. No. WO2019/208165, PCT Pub. Date Oct. 31, 2019.
Claims priority of application No. 2018-083222 (JP), filed on Apr. 24, 2018; and application No. 2018-198647 (JP), filed on Oct. 22, 2018.
Prior Publication US 2021/0161408 A1, Jun. 3, 2021
Int. Cl. G01N 21/47 (2006.01); A61B 5/026 (2006.01); G01P 3/36 (2006.01); G01P 5/26 (2006.01)
CPC A61B 5/0261 (2013.01) [G01N 21/47 (2013.01); G01P 3/366 (2013.01); G01P 5/26 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A scattered light signal measurement apparatus, comprising:
a coherent light source configured to emit coherent light to a measurement target containing scatterers;
an irradiation light control unit including a plurality of lenses configured to magnify and collimate the coherent light emitted from the coherent light source;
a light receiving element including at least one photodiode configured to receive scattered light obtained when the coherent light emitted to the measurement target is scattered by the scatterers contained in the measurement target; and
an incident angle limiting unit including at least one lens and a plurality of light shields,
wherein the incident angle limiting unit is configured to
limit an incident angle of the scattered light that is incident on a single point of the light receiving element to be equal to or smaller than a predetermined angle, and
control the light receiving element to increase an aperture ratio,
wherein each light shield of the plurality of light shields includes a plate-like member made of a material configured to prevent transmission of light having a wavelength of the scattered light, each plate-like member having a surface that extends in parallel to other light shields in a corresponding layer of the plurality of light shields,
wherein a first layer of the plurality of light shields includes a plurality of plate-like members extending in a first direction,
wherein a second layer of the plurality of light shields includes a plurality of plate-like members extending in a second direction different from the first direction, and
wherein the coherent light source includes a laser configured to emit the coherent light.