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Zoom Lenses
As opposed to a fixed focal length (FFL) lens, Zoom lens focal length can be varied, when maintains its focus. Changing the airspace between the lenses, the lens focal length will change; Such as CCTV...
The market and application of optical materials
In recent ten years, with the development of modern optics, optoelectronics and information technology, there has been a kind of photoelectric digital products and information products with high techn...
Correct cleaning method of optical lens
In the process of installation and cleaning of the lens, any slits, even fingernails or oil droplets, will increase the absorption rate of the lens and reduce the service life. Therefore, the followin...
Application prospect of nanocrystalline materials
Nanocrystalline material is a crystal glass with at least one dimension in nanometer scale in the three-dimensional space scale. Its grain size is about 1-250 nanometers. A notable feature of this mat...
What is the Cleaning of Achromatic Doublet Lens Film?
The cleaning of achromatic doublet lens can be divided into pre-coating and post-coating. Processors should adopt different cleaning methods according to the different pollutants before and after coat...
Composition of Different Achromatic Doublet Lenses
1. Achromatic doublet lens is a kind of common lens. It consists of several groups of positive and negative cemented lenses with different radius of curved surface. It can only correct the axial chrom...
Advantages and Disadvantages of Aspherical Lenses
The surface radian of aspherical lens is different from that of ordinary spherical lens. In order to pursue the thinness of the lens, it needs to change the surface of the lens. Aspheric lens should b...
How to Design and Manufacture Aspherical Lens?
Aspheric fabrication is different from traditional spherical fabrication. In traditional spherical manufacturing, the surface is defined by a single radius of curvature. Curvature can be ground and po...