1. Handheld optical coherence tomography scanner using a common-path probing arm with long working distance
- Author
-
Chen Zhong, Song Zhou, Yimin Wang, Wen Yang, and Tianran Yuan
- Subjects
Physics ,Scanner ,genetic structures ,medicine.diagnostic_test ,business.industry ,Michelson interferometer ,Interference (wave propagation) ,Signal ,eye diseases ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,law.invention ,Interferometry ,Optics ,Optical coherence tomography ,Sampling (signal processing) ,law ,medicine ,sense organs ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,business ,Sensitivity (electronics) - Abstract
In this study, a bending insensitive handheld optical coherence tomography (OCT) scanner is developed by means of common-path interferometric technique. The OCT source light is sent into a fiber based Michelson interferometer firstly and split into two portions. Light output from the Michelson interferometer, which consisting of two light components with different optical delay, is then guided into a common-path OCT probing arm with the extended working distance. The distal end of the probing fiber is polished with a small angle to serve as the reference plane of the OCT system. Theoretical analysis is carried out to derive the expression of the interference signal for the proposed imaging method, which agrees with experimental results. Measured OCT sensitivity is 100.9 dB at the sampling power of 580 μ W. The performance of the OCT scanner is demonstrated through imaging biological samples.
- Published
- 2021