Many people, raising their eyes to the starry sky, admire the alluring mystery of outer space. I would like to look into the vast expanses of the universe. To see the craters on the moon. Saturn's rings. Many nebulae and constellations. So today I will tell you how to make a telescope at home.
First, you need to decide what needs to be increased. The fact that the larger the value, the longer the telescope itself. At 50-fold increase in length is 1 meter, and for 100 times - 2 meters. That is, the length of the telescope is directly proportional to the multiplicity.
For this example, 50 times with a telescope. Next you need to buy in a store optics (or market) two lenses. One eyepiece (2) - (5) diopters. The second - the lens (1) diopter (for 100 times the telescope is required (0.5) diopters).
Then, given the need to make the lens diameter tube, or rather two pipes - one should fit snugly into the other. Moreover, the length of the resulting construct (when extended) must be equal to the focal length of the lens. In our case, 1 meter (the lens (1) diopter).
How to make a pipe? To do this, on the rim of the appropriate diameter wound several layers of paper promazyvaya of epoxy resin (the other can be the glue, but the last layers to strengthen the best epoxy). You can use the remnants of wallpaper that are lying around after the repair of the apartment. You can experiment with glass fiber, then it will be more serious design.
Further an outer tube inserted into the objective lens (1) diopter, and into the interior of the eyepiece (3) diopters. How to do it? Your imagination - most importantly provide accurate parallelism and concentricity lenses. Thus it is necessary to ensure that the distance between the lenses to spread the tube was within the focal length of the lens, in this case one meter. In the future, by changing this parameter, we will adjust the sharpness of the image.
For convenient use of the telescope tripod needed for clear its locks. If a strong increase in the slightest tremor of the pipe leads to a blurring of the image.
If you have any lenses, you can find their focal length in the following way: focus sunlight on a flat surface to give as much as possible at the point. The distance between the lens and the surface is thus the focal length.
So, to achieve increase in the telescope 50 times more necessary in the lens (1) diopter positioned at a distance of 1 meter from the lens (3) diopter.
To use 100 times magnification of the lens (0.5) and (3) changing the distance between them is 2 meters.