Patent ID: 11965777
Assignee: ADOM, ADVANCED OPTICAL TECHNOLOGIES LTD.
Field: Measurement (Instruments)
Classification: CPC G  A | IPC A  G

Claim 18:
19. Apparatus comprising:
an optical system configured for measuring optical properties of a portion of a body of a subject, the optical system comprising a light source, and at least one detector;
a calibration object that defines a front surface that is at least partially curved, and that has known reflectance characteristics; and
at least one computer processor configured:
during a calibration stage, to derive information regarding characteristics of the optical system, with reference to which the measurements that are performed upon the portion of the subject's body may be calibrated, by:
detecting light from the light source that is reflected from a plurality of points on the calibration object, using the at least one detector,
measuring intensities of the light reflected from the plurality of points on the calibration object, and
determining a calibration value at each location upon the calibration object by calculating an integral over all angles with the known reflectance of the calibration object to determine the absolute reflection coefficient, and during a measurement stage:
to detect light from the light source that is reflected from the portion of the subject's body, using the at least one detector, and
to calibrate measurements of the light that was reflected from the portion of the subject's body, using the measured intensities of the light reflected from the plurality of points on the calibration object.