Invention:
This invention is a novel method and device for imaging and ranging through various types of optical fibers, including multi-mode and multi-core fibers. This technique allows for depth measurements and imaging without needing prior knowledge of the scene or the fiber's transmission matrix. By generating a “synthetic wavefront” through the computational combination of two wave fields at slightly different wavelengths, the method counteracts the phase scrambling effects that typically occur during light transmission through optical fibers. This approach offers tunable depth and lateral resolution over a wide range, making it highly versatile and applicable in medical imaging, industrial inspection, and other fields requiring fiberoptic endoscopy.
Background:
Traditional methods of imaging and ranging through optical fibers often require complex wavefront shaping techniques and detailed knowledge of the fiber's transmission characteristics. Multi-mode and multi-core fibers present additional challenges due to their tendency to scramble light phases, complicating image reconstruction and depth measurement. This new method and device overcomes these challenges by introducing a simple and robust technique that does not rely on wavefront shaping or extensive prior knowledge of the optical fiber. The ability to create a synthetic wavefront that remains stable despite phase scrambling effects offers significant improvements in the practicality and performance of fiberoptic imaging systems, particularly in scenarios where the fiber may be subject to bending or other distortions.
Applications:
- Medical imaging
- Industrial inspection
- Telecommunications
Advantages:
- Lack of complex hardware
- No need for prior knowledge of fiber transmission matrix
- Enhanced image quality
- Depth and resolution is tunable on orders of magnitude (mm-scale to m-scale)
- Allows use of multiple types of fibers
- Promising tech for use in medical imaging applications with narrow access to help minimize risk to tissues
