Patent ID: 11971486
Assignee: NANJING UNIVERSITY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 2:
3. The three-dimensional imaging method based on the superconducting nanowire photon detection array according to claim 2, wherein further comprising a step of collecting the number of photons detected by each pixel comprises: placing the pixels at a superconducting low temperature, and biasing the superconducting nanowire circuit to be in a state slightly lower than a superconducting critical current of the SNSPD; allowing the SNSPD to absorb photons and inflicting a damage on a superconducting state of an absorption area, then resulting in a “hot-spot”, and leading to changes in a resistance value; cooling the SNSPD, resulting in disappearance of “hot-spot”, allowing the SNSPD to restore to an initial state, and leading to changes in the resistance value; enabling a circuit to generate electrical pulse signals by the changes of the resistance value of the SNSPD, and amplifying the electrical pulse signals by the amplifying circuit; converting voltage signals into current signals by the converting circuit, and obtaining the amount of charge in current signals as charge on absorbed photons by the integrating circuit; and storing the charge on the absorbed photons in the buffer and inputting the charge on the absorbed photons into the computer by rows, and comparing the charge on the absorbed photons with charge on single photon to obtain the number of the absorbed photons.