Patent ID: 11895405
Assignee: UNIVERSITY COLLEGE CORK, NATIONAL UNIVERSITY OF IRELAND, CORK
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 4:
5. The method of claim 4, wherein the camera module further comprises a first dichroic beam splitter (DBS1), a second dichroic beam splitter (DBS2), a third point Photo Detector (PD3) which is sensitive to a third spectral band and a fourth point Photo Detector (PD4) which is sensitive to a fourth spectral band;
wherein the first dichroic beam splitter (DBS1) is positioned between the first lens (L2) and the first point Photo Detector (PD2) and the second dichroic beam splitter (DBS2) is positioned between the second lens (L3) and the second point Photo Detector (PD1), and
wherein the first dichroic beam splitter (DBS1) separates imaged light between the first point Photo Detector (PD2) and the third point Photo Detector (PD3) and the second dichroic beam splitter (DBS2) separates imaged light between the second point Photo Detector (PD1) and the fourth point Photo Detector (PD4);
wherein the method further comprises:
detecting the time-frequency coded optical irradiance values of the selected pixels simultaneously at the first point Photo Detector (PD2), the second point Photo Detector (PD1), the third point Photo Detector (PD3) and the fourth point Photo Detector (PD4);
adding a “0” calibration bit to the start of the bits of the Walsh code bit sequence detected by the third point Photo Detector (PD3) and adding a “1” calibration bit to the start of the bits of the Walsh code bit sequence detected by the fourth point Photo Detector (PD4); and
performing simultaneous signal processing on the time frequency coded optical irradiance values detected by the first point Photo Detector, the second point Photo Detector, the third point Photo Detector and the fourth point Photo Detector to determine the light intensity of each of the selected pixels and produce an image of the incident light over four spectral bands.