The Huaxi Mountain in Guiyang is surrounded by water and the mountains are green. On the banks of the Huaxi River, several hills are staggered or isolated, or stretched. In the Qing Dynasty, there were local villages that built mountains and pavilions, planted flowers and trees, and accumulated water for the river. The Huaxi River with a glimpse of clear water is ten miles away, so the tourists called it "Shilihe Beach". It includes attractions such as “Shilihe Beachâ€, “Tianhetanâ€, “Qingyan Ancient Town†and “Yu Tao Wonderlandâ€. It is a scenic spot with a radius of more than ten kilometers. Huaxi Reservoir is located in the upper reaches, and Huaxi Reservoir is now called Huaxi Lake, which was built in the last century. On both banks of Huaxi Lake, there are two famous stone-plate villages. Li Village and Zhenshan Village are especially beautiful in the evening glow.
Lens is the most basic optical element that composes the microscope optical system. The objective lens, eyepiece, condenser and other components are composed of single and multiple lenses. According to the difference of its shape, it can be divided into two categories: convex lens (positive lens) and concave lens (negative lens).
Lenses can be widely used in various fields such as security, automotive, digital cameras, lasers, optical instruments, etc. With the continuous development of the market, lens technology has become more and more widely used. (Lens) The lens is made according to the law of light refraction. A lens is an optical element made of transparent materials (such as glass, crystal, etc.). The lens is a refracting lens, and its refractive surface is a transparent body with two spherical surfaces (part of the spherical surface), or one spherical surface (part of the spherical surface) and one plane. The images it forms have real and virtual images.
Double-Convex Lens,Plano Convex Lens,Bi-Concave Lens,Achromatic Lenses
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