Patent ID: 11887639
Assignee: NEURSCIENCES LLC
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. A system comprising:
a plurality of optical identifiers, each optical identifier comprising:
an optical substrate; and
a volume hologram in the optical substrate; and

a reader for the optical identifiers, the reader comprising:
an illumination source; and
a camera,

wherein the illumination source is configured to direct light into a selected one of the optical identifiers to produce an image of a corresponding one of the volume holograms at the camera,
wherein the camera is configured to capture the image, wherein the captured image is stored in a digital format by the system, and
wherein the reader further comprises:
a reflective surface at a side of the optical identifier opposite the side of the optical identifier where light from the illumination source enters the optical identifier.