How to make a telescope with a concave and convex lens

Of course. 1. Prepare two rectangular cartons, one for the convex lens and one for the concave lens. Remember to place the concave-convex lens in both openings.

2. Glue the two cartons together with double-sided tape and open the two openings to be placed.

<>4. Then glue the two lens barrels and lenses together.

5. Finally, you're done.

OK. 1. First of all, you need to prepare two rectangular cartons, one is used to put the convex lens.

One is used to put a concave lens.

It is important to remember that there should be room for the concave and convex lenses in the two openings.

2. The next step is to glue the two cartons together with double-sided tape, and open the two openings that need to be used to put the lens.

<>4. The most important thing in this step is to glue two mirror barrels with lenses together.

5. Finally, you're done.

1. A refractive telescope is a telescope that uses a lens crop mirror.

There are two types: the Galilean telescope, which uses a concave lens as an eyepiece; A convex lens as an eyepiece is called a Kepler telescope.

2. Reflecting telescope.

It is a telescope with a concave mirror crop mirror. It can be divided into Newtonian telescopes. Several types such as Cassegrain telescopes.

3. Catadioptric telescope.

In addition to the spherical mirror, a refractive element for aberration correction can be added, which can avoid difficult large-scale aspheric processing and obtain good image quality. One of the more famous ones is the Schmidt telescope.

Because the chromatic aberration and spherical aberration of single-lens objective lenses are quite serious, if the effect is generally good, two or more lens groups are generally commonly used.

Homemade telescopes with two configurations.

One is the Kepler structure: it is two magnifying glasses, the objective lens is small magnification, and the eyepiece is large magnification. This structure has a wide field of view, the multiples are easy to size, and the materials are easy to find. But if you don't have a prism, then it's like it's upside down. (Note this).

The other is the Galilean structure: a magnifying glass, with a small multiple, is the objective. A concave lens, with a large power, is an eyepiece. The advantages are like positive. Disadvantages – The advantages of the above methods correspond to each other.

The Galileo structure is actually obsolete for now, and is only used on toy telescopes, and the material is not particularly easy to find (there are many more convex lenses than concave lenses in life, right?). So if you're just looking at astronomy, you're going to make an astronomical telescope (you don't care about inverted images), then you can make a Kepler structure.

The important thing you need to know is that the flatter the objective lens and the more concave (or convex) the eyepiece, the greater the magnification of the telescope. However, it is not recommended to be very large.

Of course, the two I mentioned are only the simplest models, and the real regular telescope is still relatively complex, in fact, not only the material is optical glass, but also the lens is also very complex.

As you may already know from the introduction to the production of your professional telescopes, the so-called "convex lenses" in there are actually complex lens groups in the production - as if you know that the lens of a camera is a convex lens - a real professional camera lens has a complex lens group inside. ）

Finally, just experience the fun of hands-on, don't spend too much energy, you can play by yourself, experience the fun of hands-on, but don't expect too much from the effect. If the budget reaches a few tens of dollars - it's not very worth it.

Good luck :)

The lenses of a telescope can be convex and concave respectively. The first purpose of a telescope is to magnify the opening angles of distant objects, so that the human eye can see details with smaller angular distances. The second function of the telescope is to feed the beam of light collected by the objective lens that is much thicker than the diameter of the pupil (up to 8 mm) into the human eye, allowing the observer to see faint objects that were previously invisible.

Optical telescopes in everyday life are also known as "clairvoyants". It mainly includes amateur astronomical telescopes, theater viewing telescopes, and military binoculars.

If you need to clean the mirror, you should use absorbent cotton to occupy a little alcohol, wipe it from the center of the mirror along a direction to the edge of the mirror, and keep replacing the absorbent cotton ball until it is clean.

Telescopes are precision instruments, so do not smash, press or do other strenuous movements on the telescope. Non-professionals should not attempt to disassemble the telescope and clean the inside of the telescope by themselves.

If you need to clean the mirror, you should use absorbent cotton to occupy a little alcohol, wipe it from the center of the mirror along a direction to the edge of the mirror, and keep replacing the absorbent cotton ball until it is clean.

The basic method of installing the concave and convex lens of the telescope lens is as follows: the stool tan, the sedan liquid, the following figure.

The lenses of a telescope can be convex and concave respectively.

The one that uses a concave lens as an eyepiece is called a Galilean telescope; A convex lens as an eyepiece is called a Kepler telescope.

The basic principle of Keplerian telescopes is that the light from a distance first enters the convex lens of the objective lens, and the first time it becomes an inverted, reduced real image, which is equivalent to a camera; Then this real image enters the convex lens of the eyepiece, and for the second time it becomes an upright and magnified virtual image, which is equivalent to a magnifying glass.

1. Whether the lens of the telescope is a convex lens or a concave lens.

2. Whether the telescope objective lens is a convex lens or a concave lens.

3. Is the telescope a concave mirror or a convex lens?

4. Whether the lens of the teleopia lens is a convex lens or a concave lens.

1.The lenses of a telescope can be convex and concave respectively.

2.The one that uses a concave lens as an eyepiece is called a Galilean telescope;

3.A convex lens as an eyepiece is called a Kepler telescope.

4.The basic principle of Keplerian telescopes is that the first distant light enters the convex lens of the objective lens, and the first time it becomes an inverted, zoomed out real image, which is equivalent to a camera.

5.Then this real image enters the convex lens of the eyepiece, and for the second time it becomes an upright and magnified virtual image, which is equivalent to a magnifying glass.

6.Extended information: The invention of the telescope also had a great deal of serendipity, including a vivid story: in 1607, in the small town of Mittelburg in the Netherlands, there was a spectacle maker named Lipperch.

7.He made a living by opening an eyeglass shop, and his life was not rich.

8.Lipper has three children and often uses the lenses in the house as toys.

9.One day, three children were playing with a few lenses, and one of them was standing on the windowsill with one in each hand, one in front of the other, so that the two lenses overlapped, and then closed one eye and looked into the distance curiously through the two lenses.

10.Suddenly, he noticed that the distant scene was pulled in front of him and he could see it very clearly.

11.He was very excited about this discovery and told his father about it.

12.After hearing this, Lipper did what he did like a child, and sure enough, he could see the scenery in the distance.

13.This aroused great interest in Lipperch.

14.He repeatedly examined the two lenses, proving that one was reading and the other was myopia.

15.He found that reading lenses are in the front and myopia lenses are in the back, and as long as the distance between the two lenses is properly adjusted, he can see things at different distances.

16.Based on this principle, Lipper made a simple telescope after some research.

17.The telescope was only a tube more than 30 centimeters long, containing a reading glasses and a myopia lens, but it was the first telescope in the world.

18.The story doesn't end here, because the true value of the telescope was confirmed by the scientific experiments of a great scientist, Galileo.

Kiss! Hello, telescope lens concave and convex lens installation method, lens collection and placement: hold the lens arm with your right hand and hold the lens holder with your left hand.

Place the microscope about 7 cm from the edge of the bench, slightly to the left. Attach the eyepiece and objective. To the light:

Turn the converter so that the low-magnification objective is aligned with the clear hole (keep a distance of 2 cm between the front of the objective and the stage). Aim a larger aperture at the clear aperture. The left eye is fixed in the eyepiece and the right eye is open.

Turn the mirror so that the light is reflected into the barrel through the aperture. Through the eyepiece, you can see a bright white circular field of vision. Observation:

Place the slide specimen to be observed on the stage and press it with a clamp facing the center of the aperture. Turn the coarse Zen focus spiral so that the lens barrel is slowly lowered until the objective lens is close to the slide specimen (at this point the eyes must be looking at the objective). Imitate and open both eyes, look into the eyepiece with the left eyepiece, and at the same time rotate the coarse focus spiral in the counterclockwise direction, so that the mirror preparation track barrel slowly rises until the image is clearly seen.

Then turn the fine collimation spiral slightly to make the image of the object seen more clearly.

The first step is to measure the focal length of the two convex lenses.

F1 and F2 prepare a cylinder with a diameter slightly larger than the convex lens, and the length of the cylinder is larger than (F1 F2).

Fabrication: Two convex lenses are mounted at each end of the cylinder and fixed so that one of their respective focal points coincides.

If the cylinder is divided into two parts that are set together, it can be adjusted within a certain range, and the effect is better) Principle: when one focal point of each of the two convex lenses coincides, the object first passes through the objective lens into a real image S1 (the position is very close to the focal point, the image distance is greater than the focal length of the objective lens), and then S1 passes through the eyepiece into a magnified virtual image (because S1 is within the focal length of the eyepiece).