| 摘要 |
An observation device is provided with a light source section, a detection section and an arithmetic operation section. The light source section emits light to a moving object from multiple directions. a detection section is disposed on a predetermined plane such that scattered light having an identical scattering angle enters at an identical position, outputs data temporally changing at a frequency corresponding to an amount of Doppler shift of light that reaches at each position on the predetermined plane. An arithmetic operation section performs a one-dimensional Fourier transform with respect to time variables, for data having a position in the first direction on the predetermined plane, a position in the second direction on the predetermined plane, and a time as variables, and extracts data having an identical incident angle relative to the object from the Fourier-transformed data, on the basis of Doppler Effect. |
| 主权项 |
1: An apparatus for observing a moving object comprising:
a light source section configured to output light to be emitted to the object; an optical system configured to receive the output light and split the received light into first light and second light in front of the object, and emit the first light to the object from multiple directions; a detection section configured to be disposed on a predetermined plane such that scattered light having an identical scattering angle from among scattered light generated by the object upon irradiation with the light by the optical system enters at an identical position, and when a direction perpendicular to a moving direction of the object is defined as a first direction and a direction parallel with the moving direction of the object is defined as a second direction, output data temporally changing at a frequency corresponding to an amount of Doppler shift of light that reaches at each position on the predetermined plane, for each position in the first direction and the second direction, at each times; and an arithmetic operation section configured to perform a one-dimensional Fourier transform with respect to time variables, for data having a position in the first direction on the predetermined plane, a position in the second direction on the predetermined plane, and a time as variables, and extract data having an identical incident angle relative to the object from the Fourier-transformed data, on the basis of Doppler Effect; wherein the optical system modulates the first light or the second light with a modulator, and then causes a heterodyne interference between the scattered light and the second light on the predetermined plane. |
