Laser Alignment
Laser Alignment - Related Videos
07:12
Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment
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Cited by 3 •
2022
This protocol demonstrates the use of a microfluidic channel with changing geometry along the fluid flow direction to generate extensional strain (stretching) to align fibers in a 3D collagen hydrogel (<250 µm in thickness). The resulting alignment extends across several millimeters and is influenced by the extensional strain rate.
14:18
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Cited by 2 •
2016
A protocol to detect and automate mode locking in a pre-adjusted nonlinear polarization rotation fiber laser is presented. The detection of a sudden change in the output polarization state when mode locking occurs is used to command the alignment of an intra-cavity polarization controller in order to find mode-locking conditions.
11:36
Assembly, Loading, and Alignment of an Analytical Ultracentrifuge Sample Cell
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Cited by 21 •
2009
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.
16:34
Laser Capture Microdissection of Mammalian Tissue
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Cited by 25 •
2007
Laser capture microscopy, also known as laser microdissection (LMD), enables the user to isolate small numbers of cells or tissues from frozen or ...
09:18
In vivo Laser Axotomy in C. elegans
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Cited by 46 •
2011
A protocol to cut neurons in C. elegans with a MicroPoint pulsed laser is presented. We describe setting up the system, immobilizing worms, and severing labeled neurons. Advantages include a relatively low-cost system and the ability to sever neuronal processes or ablate cells in vivo.
FAQs
Reference points provide fixed spatial targets, while beam detectors show whether the beam reaches the intended locations. By comparing the beam with these references, an operator can establish a consistent axis before fine adjustments. This approach helps reveal deviations in position or direction and creates a repeatable basis for centering components throughout an optical system.
Irises help indicate whether the beam remains centered along the intended path, mirrors redirect it, and lenses influence where it is focused. Treating these components as having different alignment roles prevents a correction in one part of the system from being mistaken for a solution elsewhere. Their coordinated adjustment supports efficient passage of the beam through the optical setup.
Small errors in beam height, direction, or focus can prevent the beam from remaining centered or coupling efficiently through the system. Correcting these variables improves the quality and consistency of the optical signal rather than merely making the beam appear visually aligned. In bioengineering instruments, that difference directly supports more reliable measurements and reproducible experimental conditions.
A practical workflow begins by defining the intended optical path and selecting reference points along it. The beam is then checked with irises or detectors, while mirrors and lenses are adjusted to bring it onto the desired axis. Final checks confirm centering, direction, height, focus, and coupling through the system before experiments begin.
Alignment is especially important when a platform must deliver consistent optical measurement or imaging. Examples supported by the topic include fluorescence microscopy, optical biosensing, spectroscopy, imaging, and laser-based manipulation of biological samples. In each case, a well-established beam path can improve signal quality, measurement accuracy, and reproducibility across experiments.
Accurate alignment supports more than improved data: it also contributes to safe operation by keeping the beam on its intended optical path. For diagnostic and research platforms, consistent positioning and coupling help reduce variability between measurements and experiments. This control is valuable when optical performance and reproducibility must be maintained together.