Product News

Ordinary achromatic lens refers to a lens group that corrects the color difference of light of three wavelengths (blue light, green light and red light).

Analysis of achromatic lens achromatic lens is a kind of lens composed of two optical components: positive low refractive index (crown plate) and negative high

It is not rigorous to judge the positive and negative focal length of the lens simply by looking. If you have to “look”, judge by

Camera is a kind of equipment that uses the principle of optical imaging to form images and use negatives to record images. It is an

The imaging law of concave lens is: when the object is a real object, it becomes an upright and reduced virtual image, and the image

Convex lens is a convergent line, so it is also called convergent lens, and concave lens is a divergent light, also known as divergent lens.

1.1 human eyes with convex lens Schematic diagram of human eye imaging is the image formed by human eyes a real image or an imaginary

I believe that students have encountered such problems as “whether reading glasses are convex lens or concave lens” when doing questions. Convex lens is the

A biconvex lens. Light incident on both sides has the same refractive index. The focal length is the same. The light incident on both sides