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

Focusing of Light in the Eye01:16

Focusing of Light in the Eye

6.2K
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...
6.2K
Distance Corrections01:15

Distance Corrections

430
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...
430
Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

1.3K
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.
1.3K
Adjusting a Traverse01:12

Adjusting a Traverse

477
In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
477
Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

535
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...
535
Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

674
A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...
674

You might also read

Related Articles

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

Sort by
Same author

Multidisciplinary collaborative guidance on the assessment and treatment of patients with Long COVID: A compendium statement.

PM & R : the journal of injury, function, and rehabilitation·2025
Same author

Unbiased care, unequal outcomes: a nursing telehealth intervention reveals systematic inequities in COVID-19 care delivery.

BMC nursing·2024
Same author

Long COVID Definitions and Models of Care : A Scoping Review.

Annals of internal medicine·2024
Same author

Multidisciplinary collaborative consensus guidance statement on the assessment and treatment of neurologic sequelae in patients with post-acute sequelae of SARS-CoV-2 infection (PASC).

PM & R : the journal of injury, function, and rehabilitation·2023
Same author

Long COVID: Rapid Evidence Review.

American family physician·2022
Same author

Some displays of lens structural performance.

Applied optics·2022
Same journal

Multifunctional reconfigurable terahertz metasurface based on vanadium dioxide phase transition: achieving broadband absorption and efficient polarization conversion.

Applied optics·2026
Same journal

High-Q-factor electromagnetically induced transparency utilizing quasi-bound states in the continuum in an all-dielectric terahertz metasurface.

Applied optics·2026
Same journal

Automated stitching interferometry for high-precision metrology of X-ray mirrors.

Applied optics·2026
Same journal

Experimental demonstration of an approach to designing a metal-dielectric DBR resonant cavity structure.

Applied optics·2026
Same journal

High-precision wavefront reconstruction from a single-shot interferogram using a physics-driven hybrid feature calibration network.

Applied optics·2026
Same journal

Ultra-high-Q Fano resonance based on coupled topological corner states in Kagome photonic crystals.

Applied optics·2026
See all related articles

Related Experiment Video

Updated: May 3, 2026

Simulating the Mechanics of Lens Accommodation via a Manual Lens Stretcher
05:14

Simulating the Mechanics of Lens Accommodation via a Manual Lens Stretcher

Published on: February 23, 2018

6.4K

Aberration considerations in lens tolerancing.

Eric Herman, Jose Sasian

    Applied Optics
    |February 12, 2014
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces aberration sensitivity analysis to improve optical system tolerancing. This method moves beyond the black-box approach, allowing engineers to identify critical components early and optimize manufacturing costs.

    More Related Videos

    Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
    05:46

    Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity

    Published on: September 20, 2024

    896
    Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
    05:14

    Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

    Published on: September 16, 2025

    820

    Related Experiment Videos

    Last Updated: May 3, 2026

    Simulating the Mechanics of Lens Accommodation via a Manual Lens Stretcher
    05:14

    Simulating the Mechanics of Lens Accommodation via a Manual Lens Stretcher

    Published on: February 23, 2018

    6.4K
    Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
    05:46

    Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity

    Published on: September 20, 2024

    896
    Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
    05:14

    Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

    Published on: September 16, 2025

    820

    Area of Science:

    • Optical Engineering
    • Optical Design
    • Aberration Theory

    Background:

    • Traditional optical system tolerancing often treats systems as black boxes, leading to overly strict tolerances and increased manufacturing costs.
    • Ignoring perturbation effects can result in missed compensation opportunities and inefficient design processes.

    Purpose of the Study:

    • To move beyond the black-box tolerancing approach in optical design.
    • To provide optical engineers with methods for aberration sensitivity analysis for improved tolerancing.
    • To reduce manufacturing costs by optimizing tolerance settings.

    Main Methods:

    • Utilizing aberration theory for plane-symmetric systems to analyze tolerance sensitivities.
    • Performing exact wavefront calculations for various aberrations including astigmatism, coma, and distortion.
    • Analyzing sensitivities to perturbations such as surface tilt, center thickness, index value, and radius.

    Main Results:

    • Aberration sensitivity evaluation can be performed quickly and integrated into the initial lens design phase.
    • Identifies problematic surfaces or elements early in the design process, avoiding lengthy Monte Carlo simulations.
    • Enables ad hoc compensation by understanding aberration sensitivity to specific perturbations.

    Conclusions:

    • Aberration sensitivity analysis offers valuable insights into optical system tolerancing, enhancing efficiency.
    • This approach allows for more realistic and cost-effective tolerance setting.
    • It empowers lens designers to proactively address potential issues before extensive simulations.