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Highlighted Companies

  • Eagle Eyes China Inspection Company (China): Eagle Eyes (CHINA) Quality Inspection Co.,Ltd. is a professional Third Party China Inspection company, offering...
  • Fused Silica Precision Lenses For Solid State Laser Applications - China

    price: contact company for price

    A biconvex lens is a positive lens characterized by a longer focal length in the middle and shorter focal lengths at both ends.

    These lenses are used in a wide variety of applications such as camera lenses, projectors, telescopes and microscopes.

    Bi-convex lenses are often used to expand light beams.

    In this article, we discuss the properties, functions, and applications of biconvex lenses for beam expansion.

    Bi-convex lenses are made of optical glass and are convex on both sides.

    The center of the lens is thicker than the edges, which provides a focal point for the light rays entering the lens.

    Light rays entering the lens are refracted and converged to the focal point.

    The distance between the focal point and the center of the lens is the focal length.

    The focal length of a biconvex lens depends on the curvature of the lens and the refractive index of the glass.


    Company Contact:


    • Phone: 86-0431-80532823

    • Address: No.6577, HeXie Street, Changchun , JiLin , China

    • Email: Email


    Published date: January 11, 2026

    • Business Description: CLZ Optical Co., Ltd is one of China’s leading optical manufacturing companies.

      We manufacture a wide range of optical components for many different fields like Medical, Life Sciences, Defense and Aerospace and R&D.

      We were established in early 2012 in China’s Optical Manufacturing hub of Changchun.

      CLZ was founded by 4 people who have a combined 60 years of optical experience and training at Qioptiq in Singapore.

      After returning to their homeland, they employed their technical knowledge into optical processing.

      With the principles of an innovative spirit, scientific attitude, team work and honesty, the founders of CLZ have been able to grow their business quickly and successfully.

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