Jove
Visualize
Contact Us

Related Concept Videos

Geometry of Hyperbolas01:30

Geometry of Hyperbolas

A hyperbola consists of all points where the absolute difference of distances to two fixed points, called foci, remains constant. The standard equation isEach branch extends infinitely and approaches two asymptotes, which guide the curve’s behavior. The parameters a and b define key features: a measures the distance from the center to each vertex along the transverse axis, while b influences the slopes of the asymptotes. The asymptotes have equationsA rectangle centered at the origin with...

You might also read

Related Articles

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

Sort by
Same author

Wave-front recovery from two orthogonal sheared interferograms.

Applied optics·2010
Same author

Axial tolerance in the position of aberration compensators placed in a converging beam.

Applied optics·2010
Same author

Path-independent phase unwrapping of subsampled phase maps.

Applied optics·2010
Same author

First-order parameters for a general two-beam interferometer.

Applied optics·2010
Same author

Design of lenses to project the image of a pupil in optical testing interferometers.

Applied optics·2010
Same author

Sub-Nyquist null aspheric testing using a computer-stored compensator.

Applied optics·2010
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 Experiment Video

Updated: Jun 16, 2026

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

Hartmann test of aspherical mirrors.

D Malacara

    Applied Optics
    |January 30, 2010
    PubMed
    Summary

    Astronomical aspherical mirrors can be accurately tested using a modified Hartmann null test. Small wedges placed over the Hartmann screen holes compensate for spherical aberration, enabling precise optical shop measurements.

    Area of Science:

    • Optical engineering
    • Astronomy
    • Metrology

    Background:

    • Testing astronomical aspherical mirrors is crucial for telescope performance.
    • Traditional testing methods can be complex and time-consuming.
    • The Hartmann test is a common technique for optical surface evaluation.

    Purpose of the Study:

    • To present a modified Hartmann null test for astronomical aspherical mirrors.
    • To demonstrate a method for compensating spherical aberration during testing.

    Main Methods:

    • Utilizing a Hartmann screen with small wedges placed over each hole.
    • Adjusting the wedge angle to precisely compensate for spherical aberration.
    • Performing the test in an optical shop environment with the object and image at the center of curvature.

    More Related Videos

    Using an Automated Hirschberg Test App to Evaluate Ocular Alignment
    05:40

    Using an Automated Hirschberg Test App to Evaluate Ocular Alignment

    Published on: March 24, 2020

    Related Experiment Videos

    Last Updated: Jun 16, 2026

    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

    Using an Automated Hirschberg Test App to Evaluate Ocular Alignment
    05:40

    Using an Automated Hirschberg Test App to Evaluate Ocular Alignment

    Published on: March 24, 2020

    Main Results:

    • The modified Hartmann null test effectively compensates for spherical aberration.
    • This method allows for accurate testing of aspherical mirrors in the optical shop.
    • The test provides a null result, simplifying analysis.

    Conclusions:

    • The described Hartmann null test is a viable and efficient method for evaluating astronomical aspherical mirrors.
    • This technique enhances the precision of optical testing in the development of astronomical instruments.