How to make your own space telescope? How to make your own astronomical telescope

Materials: Large convex lens (objective), small convex lens (eyepiece), flashlight, thick cardboard, glue, ruler, etc.

Step 1: Fix the large convex lens (objective), place a piece of paper behind the lens, illuminate the lens with a flashlight, and move the piece of paper to observe the lens focus.

Step 2: Repeat step 1 by replacing the large convex lens (objective) with a small convex lens (eyepiece) to observe the lens focus.

Step 3: Design a zoom telescope.

Step 4: Move the distance between the ruler and the telescope with the minimum grid (cm) of the self-made telescope** ruler to observe the distance of the farthest recognizable ruler grid.

I bought a 560x astronomical telescope at the Beijing Planetarium for 280 yuan, and although it was very crude, it could be used. In fact, what kind of telescope do you use to look at the stars, what is a space telescope. For example, to look at the constellations, it is enough to use 20 times.

If you want to make your own, it is recommended not to make more than 200 times, it is too difficult.

Eyepiece: Small convex lens with a focal length of 1 cm (available at optical instrument stores) Objective lens: 100-degree reading glasses lens (available at optical stores).

Lens body: Cardboard rolled into a tube, glued well, glued to one end. It's best to make two sleeves tightly together for easy focusing.

It is recommended to glue a layer of newspaper to the inside of the cardboard so that the cover is tighter. I don't know, did you make it clear?

Hehe! Now telescopes are not expensive! A space telescope is only 10,000 yuan!

You can go to the designated place of purchase and buy one...

Both the eyepiece and the objective lens are convex lenses.

Self-made telescope, if the requirements are not high, just doing blind play, probably the structure is relatively simple:

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.

The other is the Galileo structure, and after reading your question, don't do this, right? That's not much to say.

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.

But actually, I personally don't recommend you to buy materials to make a telescope!

Sometimes I think that it may be better to buy your own parts and make your own products, and in some ways, it may be better than buying formal products.

After all, the processing of optical lenses is more complicated, and you may understand it by looking at this.

As far as I know, in fact, there will be deviations in the accuracy of many lenses produced at present, and the official product, at least there will be control in this regard. For example, when the telescope production line purchases lenses, it will make requirements, and the lens processing production line does not dare to fool casually.

And, even so, in fact, after the product is officially released, you will still find that there are some lenses that have been installed on the product from the level of clarity, and there are flaws in terms of accuracy. Of course, responsible merchants will filter out such products to a certain extent – from a selfish reputation point of view, of course, which is obviously good for users as well. Although it may only be a small percentage of merchants who will do it more meticulously.

And if you are an ordinary person to buy this kind of bulk lens, I feel that many links may have the above risks. And you also know that even if the lens is not accurate, it will be difficult for you to find it without making a telescope.

So I feel that if you make your own home, try to make it with the materials you have at hand, and don't spend a lot of money on procurement. If you really like it, then you still have the opportunity to buy the finished product in the future, I think in the current market situation, maybe it's safer.

However, I want to say here that I don't recommend that you buy materials to make telescopes, and I don't recommend you buy astronomical telescopes, because astronomical telescopes, don't look at those advertisements, it's actually very boring to play. It is estimated that more than 80% of people, when they buy back astronomy, will be disappointed and then idle... That is, a waste of money.

Personally, I'm against self-control, but I'll give you the way!

I'm an astronomy enthusiast and I have a book that teaches me how to make a simple astronomical telescope.

I'll type it out for you now.

Material: Two paper towel inner core rigid cylinders with slightly different diameters.

One plastic objective (diameter 43 mm, focal length 400 mm).

One plastic eyepiece (mm in diameter, focal length 25 mm).

Styrofoam holder for one eyepiece.

A tube of scotch tape.

A meter ruler. Steps:1Insert one cartridge into the other, and the two cartridges can be moved and adjusted, but will not slip.

2.Place the large objective flat on the outer end of the paper core tube and tape the objective there, but try not to block the objective as much as possible.

3.Make a hole in the styrofoam mirror holder and insert the small eyepiece into the hole.

4.The eyepiece is dismantled and placed into the inner cylinder of the tail of the telescope in the opposite direction of the objective.

5.Fix the meter ruler to the wall and look at the meter ruler through the eyepiece from a distance of 5 meters. Adjust the telescope of the paper core barrel so that the numbers on the meter ruler can be read clearly.

6.Use a telescope to look at other objects in the classroom or outside the window.

That's what I write in my book. The focal length of the lens can be measured by the sun, take a piece of white paper (not too thin), point the lens at the sun, focus the light on the white paper, by moving the lens up and down, a small and brightest point will appear on the white paper, and then use a scale to measure the distance from the bright spot to the center of the light (the center of the lens), this is the focal length of this lens.

If you don't want to go through the hassle you can give the data to the glasses shop, they can do it for you, but the price may be a little more expensive.

I believe that many friends who are interested in optics are eager to have a telescope of their own, because there are few real contacts with optical instruments in life, so when it is really done, it will be due to the lack of some basic information, I don't know where to start, the telescope vision blog is specially prepared for such friends in need, today I will share with you how to make a self-made telescope.

Tools There are two convex lenses, one large and one small. The small ones are used as eyepieces in telescopes, and the larger ones are used as objective lenses. It should be noted that because the optical principles of telescopes are different, the materials and methods required to make them are also different

Step Method (Of course, the two I mentioned are just models, real regular telescopes, or more complicated in fact, not only the material and lens are different,—— the so-called "convex lens" in it - in fact, the real production, is used with a complex design of the lens group - as if you know that the lens of the camera is a convex lens - the real professional camera lens, the inside is a complex lens group. ）

Because you said concave lenses, I think you want to make the first one, right? It's okay too. Let's talk about the law:

The rule is that the magnifying glass (reading glasses) of the objective lens is smaller, and the myopia lens of the objective lens has a larger power, the greater the magnification of the telescope you make!

Precautions You just need to know this, you don't need a specific dimensional drawing, because what—unless you want to make a "specific" length and a "specific" multiple of the telescope, that needs parameters, what kind of lens you have to have, in order to make up that length and specifications. And if you just want to enlarge a little bigger (whether he is a double or exactly 10 times), the length doesn't matter, then don't care about the parameters, just know the principle I said above, just make up! Right?

Hehe, even if I want to give you a specification size, I can't find a suitable one.

Well, that's all in general, personal advice, you can experience the fun of hands-on, but don't invest too much energy and spend.

2. Fold the two long sides of this rectangular paper in half.

3. Then, cut into two rectangles of equal size.

4. Then roll them into a cylinder shape.

5. Then, glue the two cylinders together with double-sided tape, so that the prototype of the telescope is ready.

6. After that, use double-sided tape or paper strips to circle the upper and lower ends close to the top, which is both image and firm.

7. Now, you can hold your telescope and play the observation game.

Change the field of view by moving the large magnifying glass and be careful not to do it in areas with strong light.

I think so, reliable!