The difference between optical lenses and ordinary lenses

      Optical lenses are divided into two types of lenses, concave spherical lenses are used to correct myopia, convex spherical lenses are used to correct hyperopia, and lenses, prisms, contact lenses, intraocular lenses, etc. are used to correct vision, eliminate visual fatigue, and protect or treat eyes.

      Ordinary lenses are just flat mirrors and do not have the function of correcting vision. Optical lenses have a high degree of transparency, high uniformity of physical and chemical properties and specific optical constants. These properties cannot be replaced by ordinary lenses.

      Optical lens glass is made of high-purity silicon, boron, sodium, potassium, zinc, lead, magnesium, calcium, barium and other oxides mixed according to a specific formula, melted at high temperature in a platinum crucible, stirred evenly with ultrasonic waves to remove air bubbles; Cool down slowly for a long time to avoid internal stress on the glass block. After cooling, the glass block must be measured by optical instruments to check whether the purity, transparency, uniformity, refractive index and dispersion rate meet the specifications. Qualified glass blocks are heated and forged into optical lens blanks.

      Optical lenses High-precision optical lenses are suitable for laser stage lights, video cameras, fisheye lenses, projectors, telescopes, fingerprint recognition instruments, microscopes, digital cameras, etc. Ordinary optical lenses are suitable for magnifying glasses, stage lighting, educational toys, craft gifts, peeping glasses (door mirrors), etc.

      Today, with the rapid development of science and technology, spectacle lenses made of new optical material resins are far superior to ordinary lenses in terms of optical performance, safety performance, and protection against harmful rays.