Patent ID: 11874452
Assignee: ALENTIC MICROSCIENCE INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. An apparatus comprising:
a first surface arranged to receive a fluid specimen within a near-field distance of a light-sensitive pixel array;
a second surface and a movement mechanism configured to move the second surface to within a predetermined distance from the first surface, to form a single layer of sample units in the fluid specimen in at least a portion of a space between the first surface and the second surface, wherein the sample units comprise a light absorbing substance;
a light source; and
electronics coupled to the light source and the light-sensitive pixel array, the electronics configured to perform operations comprising:
causing the light source to illuminate the fluid specimen with light having a first wavelength;
causing the light-sensitive pixel array to capture an image of the fluid specimen illuminated with the light having the first wavelength;
identifying, in the image, a first sample unit of the single layer of sample units;
determining, based on the image, a first intensity corresponding to light passing through the first sample unit;
determining, based on the image, a background intensity at a location of the first sample unit;
determining a path length through the single layer of sample units; and
based on the first intensity, the background intensity, the first wavelength, and the path length, determining a concentration of the light absorbing substance.