Patent ID: 11892802
Assignee: NATIONAL CENTRAL UNIVERSITY
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The lensless holographic imaging system of claim 1, wherein each said system reference light is a spherical wave originating from a point source, and the lensless holographic imaging system further comprises an image reconstruction module for performing an observation-depth-based digital image reconstruction process comprising the steps of:
inputting an observation depth, wherein the observation depth is a linear distance between the point source of a system reference light and an inspection plane of a said object under inspection;
reading a point source depth, wherein a linear distance between the point source of the system reference light corresponding to the input observation depth and the image capture device is calculated and read as the point source depth; and
performing interference-signal- and observation-depth-based image reconstruction, wherein the interference signal corresponding to the system reference light corresponding to the input observation depth is converted into an digital interference signal, the digital interference signal corresponds to an electric field, the electric field is propagated to the read point source depth and is filtered at the read point source depth to remove a noise term while leaving a signal-term electric field, and the signal-term electric field is propagated to the input observation depth to generate a reconstructed image.