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Optical lens processing is the main processing product of Evita, and one of the important applications is optical ultraviolet optical lens. As we all know, light ultraviolet rays are divided into near ultraviolet (UV-A, 320nm-400nm), ultraviolet (UV-B, 280nm-320nm) and ultraviolet (UV-C, 200nm-280nm) according to their wavelengths. UV-A easily causes corneal burns, vitreous opacity and cataracts; […]

There are also two mirrors used, the first one is C8, Shika; the second one is the MEWLON210 on hand, Cassegrain. In spite of this, the adjustment of the optical axis of the catadioptric has been ineffective, and there is basically no adjustment. There’s nothing to do tonight. I calmed down and carefully experienced the […]

A telescope is an optical instrument that uses concave and convex lenses to observe distant objects. The light passing through the lens is refracted or the light is reflected by the concave mirror to make it enter the small hole and converge to image, and then pass through a magnifying eyepiece to be seen. Also […]

In modern astrophotography, using a digital camera to take astronomical photos can take dozens of photos. Although each photo is exposed for only a few minutes and the captured image is underexposed, high-quality pictures can be obtained through computer software synthesis and processing. . From the picture processing process below, we can see the basic […]

1 good tripod A stable tripod is an extremely important tool for astrophotography. It can ensure that the camera remains absolutely stable and will not shake slightly during a long shooting time. 2 aim at the north celestial pole Aligning the polar axis of the equatorial mount to the north celestial pole is a very […]

The disadvantage of the front sight of the objective lens is that it is not easy to protect. For example, when it is dropped, the objective lens is definitely the first to touch the ground first. Moreover, the sealing of the focus of the general front objective lens is not very good, it is easy […]

The reticle of the scope mainly has two front and rear. The front is the reticle placed at the back of the objective lens group and also includes a field lens. The main thing is the embodiment of a situation in the front of the revolver. The rear position means that the reticle is placed […]

Nowadays, there are many red film binoculars with strong mirror reflection and shining light on the market. Some dealers call them “infrared”, “sub-infrared”, “ruby coating” and so on. They will also tell you that they are capable of “Infrared Night Vision Telescope” for observation at night. Please friends don’t be fooled! The real infrared night […]

There are a wide variety of binoculars on the market. Their appearance, size, price and purpose are different. Some are used for viewing scenery, sports competitions and theatrical performances, some are used for observing birds and other animals, and some are used for observing birds and other animals. For fixed-point surveillance (such as forests, electricity, […]

1. The distance seen by the telescope is related to human vision For example, the letters on the eye chart: when placed at a distance of 5 meters, people with good eyesight can see the bottom row, and people with nearsightedness may only see the first few rows. If you put the eye chart at […]

Invented by Galileo. During the 18 years that Galileo worked at the University of Padua, he initially focused his main energy on the mechanics research that he had always been interested in. He discovered an important phenomenon in physics-the inertia of the motion of objects; he did a famous slope practice and concluded The quantitative […]

Although the basic principles of military telescopes are no different from ordinary civilian telescopes, there are many differences due to the different use environment and different observation objects. First of all, their optical systems are different. Most military telescopes have reticles, and their reticles used at night are also illuminated by lights. The exit pupil […]

Hubble Space Telescope (Hubble Space Telescope, abbreviated as HST), named after the astronomer Hubble, is a telescope that orbits the earth. His position is above the earth’s atmosphere, so it has the benefits that ground-based telescopes do not have-the image will not be disturbed by atmospheric turbulence, the viewing angle is excellent and there is […]

Military telescope instruments: The vast majority of field military optical instruments have the basic characteristics of telescopes with telescopes as the basic primary colors. Generally speaking, military telescopes are limited to handheld, binocular telescopes whose main purpose is to observe and search. Their working principle and appearance are not much different from ordinary civilian telescopes. […]

1. Raising the problem For everyone who loves science, especially astronomy, the telescope is naturally one of the most desirable scientific instruments. On a clear night, facing the vast universe, how fascinating the colorful celestial bodies are! At this time, everyone hopes to have a small astronomical telescope to see the orbiting mountains on the […]

(James Webb Space Telescope, JWST) is a planned space telescope for infrared observation. As a follow-up to the Hubble Space Telescope, which will end its observation activities in 2010, it is planned to be launched into space in 2011. However, due to the effects of life-delay measures such as the Hubble Space Telescope’s repairs, the […]

The US Space Shuttle Columbia took off on July 23, 1999, sending the Chandra X-ray Observatory into space. This space telescope will help astronomers search for black holes and dark matter in the universe, thereby gaining a deeper understanding of the origin and evolution of the universe. The Chandra Space Telescope was originally called the […]

Su-27 is a fighter model The Su-27 is a single-seater dual-engine all-weather air superiority heavy fighter developed by the former Soviet Union’s Sukhoi Design Bureau. Its main tasks are homeland air defense, escort, and maritime patrols. NATO gave the nickname “Flanker” (Flanker). The aircraft began development in 1969, first flew on May 20, 1977, put […]

Theoretical knowledge of telescope multiples This part only needs to be understood a little bit, it doesn’t matter if you don’t understand it. The magnification of the telescope is the angle magnification of observing an object with the naked eye and observing the same object at the same place with the telescope. For example, if […]

The binoculars are small and compact, and what you see is a positive image. Coupled with a wide field of view, it is much more convenient to use than small astronomical telescopes. However, binoculars also have shortcomings, such as small diameter, low magnification, and not suitable for photographic observation. Only by exploiting the strengths and […]