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 Experiment Videos

Modulation transfer functions of low power telescopes.

M Katz1, K Citek

  • 1Department of Vision Sciences, State College of Optometry, State University of New York, New York.

American Journal of Optometry and Physiological Optics
|March 1, 1988
PubMed
Summary

Galilean telescopes offer superior modulation transfer functions (MTF) compared to Keplerian designs. Keplerian telescope performance varies with prism orientation, impacting image sharpness and potentially causing disparities in binoculars.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

Modulation transfer functions and contrast sensitivity through low vision telescopes.

Applied optics·2010
Same author

Laser pointers: toys, nuisances, or significant eye hazards?

Journal of the American Optometric Association·1999
Same author

The Drug Evaluation Classification Program: using ocular and other signs to detect drug intoxication.

Journal of the American Optometric Association·1998
Same author

Vertical and horizontal eye displacement during static pitch and roll postures.

Journal of vestibular research : equilibrium & orientation·1996
Same author

Absence of adaptive plasticity after voluntary vergence and accommodation.

Vision research·1995
Same author

A Badal optical stimulator for the Canon AutoRef R-1 optometer.

Optometry and vision science : official publication of the American Academy of Optometry·1995

Area of Science:

  • Optical Engineering
  • Instrument Science

Background:

  • Telescope optical performance is critical for various applications.
  • Modulation Transfer Function (MTF) is a key metric for evaluating image quality.
  • Different telescope designs, like Galilean and Keplerian, have distinct optical characteristics.

Purpose of the Study:

  • To measure and compare the Modulation Transfer Functions (MTF) of Galilean and Keplerian telescopes.
  • To analyze how factors like model, magnification, and prism orientation affect telescope MTF.
  • To identify design elements contributing to performance differences between Galilean and Keplerian types.

Main Methods:

  • Measured MTF for 131 low-power Galilean and Keplerian telescopes from 7 vendors.
  • Tested on-axis and at +/- 0.7 field angles, with various grating azimuths.

Related Experiment Videos

  • Evaluated effects of exit pupil diameter and color correction on MTF.

    • Main Results:

    • Galilean telescopes demonstrated superior MTF compared to Keplerian designs.
    • Keplerian telescopes showed higher MTF with vertical gratings on-axis, unlike Galilean.
    • Off-axis, Galilean tangential MTF was poorer than radial; Keplerian showed the opposite.

    Conclusions:

    • Keplerian telescope performance is negatively impacted by roof prism errors, dependent on azimuthal orientation.
    • Inconsistent prism orientation in monoculars can lead to variable image sharpness.
    • Controlling prism deviations is essential for binocular devices to prevent vertical disparities.