Knife-edge Alignment
Knife-edge Alignment - Related Videos
10:25
Specimen Preparation, Imaging, and Analysis Protocols for Knife-edge Scanning Microscopy
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The full process from brain specimen preparation to serial sectioning imaging using the Knife-Edge Scanning Microscope, to data visualization and analysis is described. This technique is currently used to acquire mouse brain data, but it is applicable to other organs, other species.
11:36
Assembly, Loading, and Alignment of an Analytical Ultracentrifuge Sample Cell
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The analytical ultracentrifuge (AUC) sample cell holds sample and reference buffer and during experiments and is exposed to high vacuum and rotor speeds up to 60,000 rpm. This video will demonstrate the rigorous attention to detail necessary for assembly, loading and alignment of this very important component of an AUC experiment.
05:52
Clinical Efficacy of Small Needle Knife Therapy on Stage I-II Frozen Shoulder
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The protocol presented here describes the detailed operation method and proves the effectiveness of a small needle knife in the treatment of frozen shoulders.
01:17
Design Example: Alignment of a Road Line Using GIS
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2025
The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
06:42
Use of the Scissor-Type Knife During the Peroral Endoscopy Myotomy Procedure for the Treatment of Achalasia
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To minimize the technical difficulty and improve the safety of peroral endoscopic myotomy (POEM), we describe a protocol for using a scissor-type knife for the main steps of POEM, including mucosal incision, submucosal tunneling, myotomy, and hemostasis.
FAQs
As the sharp edge advances across the laser beam, it progressively blocks the transmitted light. The detector therefore records a changing power signal rather than relying on a visual image. The position associated with the intensity transition provides a quantitative reference for centering, which is valuable when the beam or optical path cannot be observed directly.
Repeating the edge measurement at different positions through the focal region shows how the beam changes as it converges and diverges. Comparing these measurements makes it possible to characterize beam size and locate the waist, the region associated with the focused beam. This adds focal information beyond a single transverse alignment measurement.
Direct imaging depends on obtaining a usable view of the beam, whereas this technique converts beam interception into detector power readings. That difference makes it useful when imaging is difficult or inconvenient. Its simple hardware and quantitative output also support repeatable positioning of lenses, mirrors, apertures, and other optical components.
A basic setup uses a laser beam, a sharp edge, a detector for transmitted power, and a mechanism that translates the edge across the beam. The edge is moved while the detector records the changing intensity. For focal characterization, the measurement is repeated through focus so the resulting data can indicate beam size and waist location.
Engineers can apply it when they need to center a laser beam, locate a focal position, or align lenses, mirrors, and apertures without depending on direct visual imaging. The method is particularly practical for precision positioning and optical system calibration because it produces measurable detector data from relatively simple hardware.
Compatibility with automated stages allows the sharp edge to be translated in a controlled, repeatable manner while transmitted power is recorded. Automation can therefore support systematic beam characterization and positioning rather than relying entirely on manual movement. In engineering systems, this helps integrate alignment measurements into laser characterization workflows and optical calibration procedures.