The reviewed paper is Rapid-scanning forward-imaging miniature endoscope for real-time optical coherence tomography. One advantage of forward-viewing OCT endoscope over transverse-imaging counterpart is that it eliminates the need for mechanically actuating the entire endoscope assembly or a rotational fiber-optic coupler. Another possible merit is that the lateral-priority image acquisition sequence greatly reduces the depth-scanning speed. […]
This old paper introduced two setups of forward-viewing instruments for optical coherence tomography (OCT). In the beginning, the author mentioned one advantage of forward-viewing devices: permitting data to be collected before the device is introduced into the tissue. I assume it’s because of forward-viewing OCT’s characteristics. Two setups were proposed: a hand-held probe, and a […]
It is not the first time that I read the paper "Fabrication of freeform optical components by fluidic shaping", but I have to admit that I did not get a very good understanding of it. This time, at least I can throw some questions to myself and offer a certain way for the next step […]
The paper ‘Fabrication of diffractive optical elements by programmable thermocapillary shaping of thin liquid films‘ proposed a new method to fabricate diffractive optical elements, that is, using the variable temperature distribution to induces surface tension gradients in the polymer-air interface. Gradient surface tension leads to the deformation of the interface, and the two-dimensional temperature distribution […]
If you are interested in this paper Shot-noise limited, supercontinuum-based optical coherence tomography, please find it here. Main contribution Current supercontinuum (SC) -based SD-OCT system cannot be operated in the shot-noise limited area because of its strong pulse-to-pulse relative intensity noise of the supercontinuum source. The authors propose an all-normal dispersion (ANDi) fiber based supercontinuum […]
1 Ultrahigh-resolution, high-speed, Fourier domain optical coherence tomography and methods for dispersion compensation In OCT, dispersion compensation is usually performed by matching the optical materials and path lengths in the two interferometer arms. Dispersion can also be compensated by using numerical techniques. Principle of SD-OCT: The sample is illuminated with broadband light. Backreflected or backscattered […]
Based on the direction of the imaging beam with respect to the longitudinal axis of the probe, OCT endoscopes can be divided into side-viewing endoscopes and forward-viewing endoscopes. Based on the location of the beam scanning device, OCT endoscopes can be divided into proximal-end scanning probes and distal-end scanning probes.
1.在Optical Coherence Tomography – Technology and Applications的第39页中，提到： The spectral resolution is governed by multiple factors including the optical aberrations in the spectrometer lenses, the resolution of the diffraction grating, camera pixel size, and electronic pixel cross talk. 关于光谱仪的分辨率，可以见How to build a spectrometer – theory，或者这里.
In this paper Microrobotic laser steering for minimally invasive surgery, a new mirror design is proposed for laser steering application. Integrated with present surgical tools, this device is 6 millimeters in diameter and 16 millimeters in length and is able to focus and steer a fiber-based laser beam at high speed (1.2 kilohertz bandwidth) over […]
(45) 2022-03-15: Simulation Analysis on the Profiles of Droplets Wetting on the Substrates Note: Use Surface Evolver to simulate the droplet behavior on the tilted substrate. Some parameters need to be set up, including water density, surface tension, radius of the substrate, and the contact angle. (44) 2022-02-04: Gravity-Controlled and Boundary-Constrained High-Throughput Fabrication of Polymeric […]