Hubble is a Cassegrain reflector telescope. Light from celestial objects travels down a tube, is collected by a bowl-like, inwardly curved primary mirror and reflected toward a smaller, dome-shaped, outwardly curved secondary mirror. The secondary mirror bounces the light back to the primary mirror and through a hole in its center.

2024年11月25日 · Hubble is classified as a Cassegrain reflector, named after a 15th century French cleric who was among the first to suggest this basic optical design. Light hitting the telescope’s main, or primary, mirror is reflected to a smaller, …

2024年1月18日 · Hubble uses two mirrors, laid out in a Cassegrain telescope design, to collect and focus light. After light travels down the length of the telescope, it hits the concave, or bowl-shaped, primary mirror. The light reflects off of the primary mirror and travels back toward the front of the telescope.

The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. ... Optically, the HST is a Cassegrain reflector of Ritchey–Chrétien design, as are most large professional telescopes. This design, with two hyperbolic mirrors, is known for good imaging performance over a ...

The Cassegrain reflector is a combination of a primary concave mirror and a secondary convex mirror, often used in optical telescopes and radio antennas, the main characteristic being that the optical path folds back onto itself, relative to the optical system's primary mirror entrance aperture.

How do Hubble’s mirrors work? Hubble is a Cassegrain telescope — a type of reflecting telescope. Light enters the telescope and strikes the large primary, or main, mirror.

2025年1月24日 · Although both Hubble and Webb are reflecting telescopes, a quick look at each of them reveals some obvious differences. Because Hubble observes the universe from an orbit just above Earth’s atmosphere, it needs to block stray light from the Sun, and reflected sunlight from Earth and the Moon, from entering the telescope.

2023年11月30日 · Specifically, Hubble is a Cassegrain reflector telescope. That just means that light enters the device through the opening and bounces off the primary mirror to a secondary mirror. The secondary mirror in turn reflects the light through a hole in the center of the primary mirror to a focal point behind the primary mirror.

2020年8月29日 · Hubble is a Cassegrain reflector telescope. Light from celestial objects travels down a tube, is collected by a bowl-like, inwardly curved primary mirror, and reflected toward a smaller, dome-shaped, outwardly curved secondary mirror. The secondary mirror bounces the light back to the primary mirror and through a hole in its center.

The Cassegrain design is the basis for many of the most famous twentieth century telescopes including the Hubble Space Telescope and the 200 inch Hale Telescope on Mt. Palomar. The identity of M. Cassegrain was finally discovered in 2000.