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Anonymous users2024-02-11Hello, excuse me, are you an astronomy enthusiast (long-term exposure to astronomical telescopes), or are you rarely in contact with it and suddenly want to make a telescope yourself?
If it's the latter, I'm afraid many friends think this matter is simple. Also misunderstood.
Usually, what I can polish is basically not the objective lens of a refractive telescope, and I can generally only grind the reflective one, and then go to the factory to plate the mirror surface - strictly speaking, it is not an objective lens.
Because the common refractive telescope has very strict requirements for the material of optical glass, and a lens also needs to be polished on 4 sides, and then glued - not the telescope imagined by ordinary people is an objective lens - that lens is a glued achromatic lens.
I used to give it to others, you can take a look.
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Anonymous users2024-02-10This is very difficult, I grinded for 24 days, at that time I was looking for information, I need to make a wooden frame by myself, as well as emery of different thicknesses and hardness, I also need asphalt, and I also need to make my own black light, go buy one, it's very difficult to get.
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Anonymous users2024-02-09It's really difficult, it's x if you're not careful, it's just a general enthusiast to buy one, don't bother.
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Anonymous users2024-02-08It's hard, and you need special tools.
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Anonymous users2024-02-07Hello, homemade telescopes, there are two structures.
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 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 am talking about are just the simplest models, the real regular telescope, or more complicated in fact, not only the material is optical glass, but also the lens is also very complex From the introduction to the production of your professional telescope, you may already know - the so-called "convex lens" in it - in fact, the real production, 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, inside is a complex lens group. ）
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.
Good luck :)
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Anonymous users2024-02-06Teach you how to make a simple version of your astronomical telescope using materials that are readily available.
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Anonymous users2024-02-05Production method: Find two convex lenses, roll two paper tubes according to the size of the outer garden of the mirror, they should be able to be put together, and then place the convex lens at both ends and fix it. Pull the paper tube back and forth to adjust the best effect of the sight glass.
Once it is simple, you can gradually improve the level of production.
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Anonymous users2024-02-04Use a concave lens and a convex lens.
Because this can make the distant object very small.
Magnify it at a certain magnification rate to make it have a large opening angle in the image space, so that objects that cannot be seen or distinguished by the naked eye become clear and recognizable. >>>More
That's right. For refracting astronomical telescopes, they can be divided into Galilean telescopes and Keplerian telescopes, both of which have convex lenses. >>>More
The angular diameter of the area of the sky that can be well imaged by the telescope is called the field of view of the telescope or the angle of view of the field of view ( ) The field of view of a telescope is often determined at the time of design. The field of view of a telescope is inversely proportional to magnification, and the greater the magnification, the smaller the field of view. Different optical systems, different imaging qualities (due to aberrations), different apertures, and different focal lengths determine the size of the telescope's different fields of view (in the case of astrophotography, the size of the negatives or CCDs also constrains the size of the field of view). >>>More
Hello, I think you want to ask, does myopia have an effect on the "effect" of using telescopes? >>>More
If you want to buy an ordinary telescope, you can't see animals at night, unless you illuminate the animals with strong light, you can see through the telescope, this is the basic principle of optics, the target can either self-emit or reflect light to be seen, which is also the reason why you can see during the day and can't see at night. If you want to buy that kind of night vision, it is relatively high, and there are low-light night vision devices that need to have starlight and moonlight to see** are more than a few thousand yuan, and there is a kind of thermal imaging **Ken can be higher. Thermal imaging is seen through imaging of the animal's body temperature.