Product Knowledge

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

The traditional spherical lens is not only thick, but also distorted and deformed when looking at things through the periphery of the lens, which is

According to the spectral characteristics of filters, filters can be divided into six categories: Bandpass filter, cut-off filter, spectroscopic filter, neutral density filter, reflection filter

The OD value in the filter OD is when light passes through a sample, part of the light will be absorbed. In spectroscopy, transmittance is

Linear gradient filter (LVF) is an optical device whose spectral characteristics change linearly with position. It is formed by plating multi-layer film systems with varying

The expansion coefficient of quartz glass is very small, only one fourteenth of that of ordinary flat glass. Quartz glass is not afraid of cold