Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Distance Corrections01:15

Distance Corrections

27
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
27
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

459
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
459
Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

115
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
115
Beams with Symmetric Loadings01:15

Beams with Symmetric Loadings

186
The moment-area method is an analytical tool used in structural engineering to determine the slope and deflection of beams under various loads. Consider a cantilever with a concentrated load and moment at the free end. The first step is constructing a free-body diagram to calculate the reactions at the fixed end. Next, the bending moment diagram is plotted to visualize how the bending moment varies along the beam's length, focusing on points where the bending moment equals zero.
The M/EI...
186
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

2.7K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
2.7K
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

400
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
400

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Transcriptome Sequencing Identified Hub Pathogenic Chemokines In Atherosclerotic Plaques.

Journal of visualized experiments : JoVE·2026
Same author

Leveraging antisolvent-processed β-sitosterol to construct a multifunctional curcumin-loaded oleogel for diabetic wound healing.

Materials today. Bio·2026
Same author

Misalignment Decoupling and Tilt-to-Length Suppression in a Micro-Actuated Beam Steering Mechanism via Nonlinear Cyclic Modulation.

Micromachines·2026
Same author

In vivo-compatible proximity labeling technologies.

Current opinion in chemical biology·2026
Same author

The prognostic value analysis of PIV, PLR, LMR, NPR, and NLR in hilar cholangiocarcinoma.

BMC cancer·2026
Same author

DMSN@AuNPs-enhanced QCM immunosensor array for non-invasive and highly sensitive detection of Cyfra21-1 in saliva.

Analytica chimica acta·2026
Same journal

Denoising algorithm of Φ-OTDR systems based on adaptive fractional wavelet transform denoising.

Optics express·2026
Same journal

Millisecond photon-to-photon latency and high-speed volumetric projection system for optogenetics.

Optics express·2026
Same journal

Polarization-encoded coaxial structured light for high-precision 3D surface profilometry.

Optics express·2026
Same journal

Discrete freeform optical design based on collaborative optimization of point cloud and local normals.

Optics express·2026
Same journal

Ultrafast ghost imaging with 25 GHz speckle switching and wavelength-division multiplexing.

Optics express·2026
Same journal

Atomic vapor cells fabricated by femtosecond laser welding of standard-optical-quality glass.

Optics express·2026
See all related articles

Related Experiment Video

Updated: Jun 24, 2025

Bringing the Visible Universe into Focus with Robo-AO
10:35

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

19.4K

Off-axis telescope misalignment correction based on defocus spot moment features.

Wei Tang, Yujia Liu, Yiqian Gan

    Optics Express
    |June 11, 2024
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel method for correcting optical mirror misalignments in off-axis telescopes without wavefront sensors. The technique uses a neural network to map image features to misalignment corrections, ensuring high imaging quality efficiently.

    More Related Videos

    Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
    06:25

    Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

    Published on: February 12, 2014

    8.5K
    Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration
    07:03

    Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration

    Published on: February 23, 2017

    7.7K

    Related Experiment Videos

    Last Updated: Jun 24, 2025

    Bringing the Visible Universe into Focus with Robo-AO
    10:35

    Bringing the Visible Universe into Focus with Robo-AO

    Published on: February 12, 2013

    19.4K
    Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
    06:25

    Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

    Published on: February 12, 2014

    8.5K
    Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration
    07:03

    Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration

    Published on: February 23, 2017

    7.7K

    Area of Science:

    • Optical Engineering
    • Image Processing
    • Machine Learning

    Background:

    • Optical mirror misalignments degrade imaging performance in systems like off-axis telescopes.
    • Environmental factors (gravity, temperature, atmosphere) and assembly errors cause these misalignments.
    • Active misalignment correction is crucial for maintaining image quality.

    Purpose of the Study:

    • To propose a novel, sensorless optical misalignment correction method for off-axis telescopes.
    • To establish an analytical relationship between point spread functions (PSFs) and mirror misalignments.
    • To develop a practical and cost-effective solution for real-time image quality enhancement.

    Main Methods:

    • Analytical modeling relating point spread functions (PSFs) to optical mirror misalignments.
    • Utilizing a fully connected neural network (FCNN) to map misalignment features to corrections.
    • Employing discrete orthogonal unbiased finite impulse response (UFIR) moment features to characterize spot image changes.

    Main Results:

    • Demonstrated effectiveness and practicality through simulation and experimental validation.
    • Successfully established a mapping between UFIR moment features and optical misalignments.
    • Achieved accurate characterization of intensity and geometric spot image changes.

    Conclusions:

    • The proposed sensorless method provides a low-cost and straightforward approach to optical misalignment correction.
    • This technique avoids wavefront detection errors and reduces iterative processing delays.
    • Enables high imaging quality during both alignment and observation phases of optical systems.