Patent ID: 11906439
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. An optical inspection apparatus, comprising:
a camera including an image sensor configured to:
acquire image data by the image sensor, the image data including:
a light beam having a first wavelength in accordance with a first scattering angle from a subject as information of a first image, and
a light beam having a second wavelength different from the light beam having the first wavelength as information of a second image in accordance with a second scattering angle different from the first scattering angle from the subject, and
acquire a light beam intensity of the first wavelength and a light beam intensity of the second wavelength as a complementary relationship by the image sensor; and

a processor configured to extract surface information of the subject by comparing the information of the first image and the information of the second image,
wherein the complementary relationship is a relationship in a certain pixel of the imaging unit, in which:
when the light beam intensity of the first wavelength is increased, the light beam intensity of the second wavelength is weakened in the same certain pixel, or
when the light beam intensity of the second wavelength is increased, the light beam intensity of the first wavelength is weakened in the same certain pixel.