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

Kepler's First Law of Planetary Motion01:10

Kepler's First Law of Planetary Motion

4.1K
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. He formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe.
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
4.1K
Circular Orbits and Critical Velocity for Satellites01:16

Circular Orbits and Critical Velocity for Satellites

2.9K
The Moon orbits around the Earth. In turn, the Earth (and other planets) orbit the Sun. The space directly above our atmosphere is filled with artificial satellites in orbit. One can examine the circular orbit, the simplest kind of orbit, to understand the relationship between the speed and the period of planets and satellites with respect to their positions and the bodies that they orbit.
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...
2.9K
Kepler's Second Law of Planetary Motion01:29

Kepler's Second Law of Planetary Motion

4.3K
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. His first law states that all planets orbit the Sun in an elliptical orbit, with the Sun at one of the ellipse's foci. Therefore, the distance of a planet from the Sun varies throughout its revolution around the Sun.
While in an elliptical orbit, the total energy of the planet is conserved. Therefore, the planet slows down when it is at apogee and...
4.3K
Angle of Twist - Elastic Range01:13

Angle of Twist - Elastic Range

360
Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...
360
Adjusting a Traverse01:12

Adjusting a Traverse

83
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...
83
Kepler's Third Law of Planetary Motion01:18

Kepler's Third Law of Planetary Motion

3.4K
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. In 1909, he formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe. However, in 1918, he published his third law of planetary motion, which gives a precise mathematical relationship between a planet's average distance from the Sun and the amount of time it takes to revolve around the Sun. It...
3.4K

You might also read

Related Articles

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

Sort by
Same author

Artificial Intelligence in urban design: A systematic review.

Cities (London, England)·2026
Same author

SplitSeek-Pro: accurate prediction of splittable sites on protein structures.

Nature communications·2026
Same author

Automatic detection of moral information: evidence from visual mismatch response (vMMR).

BMC psychology·2026
Same author

Colletotrichum fructicola-induced fungal keratitis: a case report and literature review.

Journal of ophthalmic inflammation and infection·2026
Same author

TSG101 Promotes SIAH1 Auto-Ubiquitination to Drive Migration and Invasion in Hepatocellular Carcinoma Cells.

Journal of cellular and molecular medicine·2026
Same author

Is the morphology of the posterior superior iliac spine in Chinese population related to gender, age and bilateral symmetry? Insights from morphometric analysis based on CT 3D reconstruction and its clinical implications.

Annals of anatomy = Anatomischer Anzeiger : official organ of the Anatomische Gesellschaft·2026

Related Experiment Video

Updated: Jul 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

19.5K

Active Alignment of Large-Aperture Space Telescopes for Optimal Ellipticity Performance.

Xiaoquan Bai1,2, Xixi Gu1,2, Boqian Xu1,2

  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.

Sensors (Basel, Switzerland)
|July 11, 2023
PubMed
Summary

This study introduces a new active optical alignment strategy for space telescopes to improve ellipticity performance, crucial for dark matter exploration. The method optimizes aberration fields for better results than traditional wavefront error correction.

Keywords:
active optical alignmentellipticity performancespace telescope

More Related Videos

Author Spotlight: Advancing Knowledge in Far-From-Equilibrium Materials Through Light-Sheet Microscopy
08:32

Author Spotlight: Advancing Knowledge in Far-From-Equilibrium Materials Through Light-Sheet Microscopy

Published on: January 26, 2024

2.1K
A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors
11:15

A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

Published on: May 30, 2016

25.3K

Related Experiment Videos

Last Updated: Jul 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

19.5K
Author Spotlight: Advancing Knowledge in Far-From-Equilibrium Materials Through Light-Sheet Microscopy
08:32

Author Spotlight: Advancing Knowledge in Far-From-Equilibrium Materials Through Light-Sheet Microscopy

Published on: January 26, 2024

2.1K
A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors
11:15

A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

Published on: May 30, 2016

25.3K

Area of Science:

  • Optical Engineering
  • Astrophysics
  • Telescope Design

Background:

  • Ellipticity performance in space telescopes is critical for advancing dark matter exploration.
  • Conventional active optical alignment prioritizes minimizing wavefront error, often leading to suboptimal ellipticity.
  • Existing methods do not sufficiently address the specific needs for optimal ellipticity correction in complex optical systems.

Purpose of the Study:

  • To propose and validate a novel active optical alignment strategy for achieving optimal ellipticity performance in space telescopes.
  • To enhance the capabilities of space telescopes for precise dark matter detection through improved optical alignment.
  • To investigate aberration field characteristics associated with optimal ellipticity.

Main Methods:

  • Utilized nodal aberration theory (NAT) as the foundational framework for analysis.
  • Employed global optimization techniques to determine the aberration field distribution for optimal full field-of-view ellipticity.
  • Leveraged the degrees of freedom (DOFs) of the secondary mirror and folded flat mirror for aberration compensation.

Main Results:

  • Successfully determined the aberration field distribution corresponding to optimal ellipticity performance.
  • Demonstrated the effectiveness of using secondary mirror and folded flat mirror DOFs for ellipticity correction.
  • Provided valuable insights into the aberration field characteristics that yield optimal ellipticity.

Conclusions:

  • The proposed active optical alignment strategy significantly improves ellipticity performance compared to traditional methods.
  • This research provides a foundational approach for correcting ellipticity in complex space optical systems.
  • The findings pave the way for more accurate dark matter exploration missions utilizing enhanced telescope capabilities.