Types of optical lenses (I)
The basic properties of optical lens materials include optical properties, calculation of refraction and control of optical properties; Mechanical and thermal properties, electrical properties materials; Chemical properties Know the corresponding changes of materials through the chemical substances that may be exposed to the outside world. With the development of science and technology, there are more and more types of lenses, each with advantages and disadvantages,
Optical lens -- glass: optical white lens, Kesai lens, Kesai lens, color change lens, ultra clear lens, coated lens and dual light lens.
Optical lens -- optical white lens: high transmittance (transmittance), clear and bright vision, cheap, suitable for students and those who spend a long time indoors at the desk. Due to the limitation of refractive index, when the degree exceeds 5.00D, the lens is thicker. With high transmittance, clear and bright vision, and low price, it is suitable for students and those who have been indoors for a long time. Due to the limitation of refractive index, when the degree exceeds 5.00D, the lens is thicker.
Optical lens -- X lens: It has a two-color effect, and it is light purple red under the incandescent lamp and light cyan blue under the fluorescent lamp, and its vision is soft.
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