The principle of Galileo telescope and optical road map

The principle of Galileo Telescope and optical road map

The objective mirror is a Telescope that can gather lens and eyepiece to diverge the lens.The real image of the light through the refraction of the objective mirror is on the focus of the eyepiece (behind the purpose of the person). This is like a virtual image of the pair mirror, so it is refracted into a magnifying positive image.The magnitude of the Galileo Telescope is equal to the ratio of the focal length of the material mirror to the focal length of the eyed mirror.Its advantage is that the lens barrel can be short and can be positive, but its vision is relatively small.Two Galileo's Telescopes with a low magnification of the magnification are tied together. In the middle, a bolts can be used to adjust its clearly. It is called "Watching mirror"; because it is convenient to carry, it is often used to watch performances.

You can use a very low cost to make a Galileo -style Telescope.Buy a glasses with a diameter and focal length from cultural supplies stores as objective mirrors and lens with a small -diameter and smaller diameter as eyepiece.Use glue and small grooves to put two lenses in the hard paper Tube, and make a simple table, so a Telescope of the mountains on the moon, the stars in the galaxy, and the Jupiter's satellite Telescope can be made.Think about it, Galileo was discovered with this person.But remember, do not directly observe the sun through the Telescope, so as not to burn your eyes at high temperature!Galileo's refraction Telescope has an annoying disadvantage, that is, "fake color" is generated around the bright objects.The disease produced by "fake color" is that the so -called "white light" is not the light of white color at all, but a mixing from all color light that forms a rainbow from red to purple.When the beam enters the objective mirror and is refracted, the refraction level of various color light is different, so the focus of the imaging is different, and the blur is generated.

In 1611, another astronomer Capeller used two dual -convex lenses as objective mirrors and mirrors, which improved the magnification significantly. In the future, people call this optical system as the Campler -style Telescope.The refractive Telescope used now is still two forms.But the "fake color" problem has not been solved.

Lieper is not an astronomer. He never thought that his new installation was aimed at the sky.But not long, the news about his discovery spread.Fortunately, Galileo, a professor at the University of Padova in Italy, learned about it.Galileo quickly created a refraction Telescope.He uses flat convex lens as objective mirror and concave lens as eyepiece.From the light shot from the objects to be studied to a glass lens of the Telescope lens, the objective mirror reflects the light and focuses on it as the focus of the focus, where the glowing image is formed.This is enlarged by the lens of the eyepiece and entered the eye.