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Many friends consulted me about the difference between night vision and thermal imager. Today I will explain in detail the working principle and scope of use of the two, as follows: As far as the development of night vision goggles is concerned, at least three revolutions have gone through from low ... Read More
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Since World War II, thermal imaging technology has been used in the military. Because this instrument works by thermal radiation, it can clearly see the enemy's whereabouts through the dark battlefield. And because it is a passive receiving system, it is safer and more concealed than visible light ... Read More
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As a physics student, I was very dizzy at the beginning of the large amount of information on the Internet. There are many types of telescopes, and the principles of light paths are different. It can be said that different types of telescopes have their own characteristics. Below, I will give some ... Read More
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For many years, many amateur astronomers have told us how their enthusiasm for the stars was ignited by the first astronomical telescope. I am also so impressed with the fascinating sight of staring at the moon using the first astronomical telescope for the first time, so much so that for decades, I ... Read More
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How to choose a binoculars that suits you, we have given specific introductions in previous issues. Today, let's talk about how to choose a single-scope telescope suitable for bird watching. Telescope aperture: The aperture of a general bird watching monocular is between 50~95mm, and the aperture is ... Read More
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Astronomical telescopes can detect stars hundreds of millions of light-years or more because the electromagnetic waves emitted by these stars have been transmitted to the earth over hundreds of millions of years and then be observed by astronomical telescopes. There are two main types of astronomica... Read More
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Astronomical telescopes can detect stars hundreds of millions of light-years or more because the electromagnetic waves emitted by these stars have been transmitted to the earth over hundreds of millions of years and then be observed by astronomical telescopes. There are two main types of astronomica... Read More
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First of all, you must be clear about the purpose of buying the best spotting scope for the money: you want to see the scenery in the distance when you travel daily, or go out to watch a performance. If it is inconvenient to bring a tripod, choose 8 times, which is more stable in hand. For example, ... Read More
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Speaking of single-pass telescopes, there are two types. One is simply compact and portable, and the other is for bird watching, starry sky or sailing use. In fact, the comfort of a single-lens telescope is far less than that of a binocular. Of course, everyone has different needs. It is very ... Read More
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The above figure takes the luminous object placed outside of the focal length as an example. The parallel light emitted from the top of the light source is refracted by the lens. The refracted light will pass through the intersection point F. The light emitted from the top of the light source and ... Read More
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