Scattered light signal measuring apparatus and information processing apparatus

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.