Laser lenses are the optical lenses that are used in laser-based devices for a variety of laser applications. Most common applications of laser lenses include focusing a laser beam into a small spot, generating a collimated laser beam from a laser source, creating a straight laser line from a collimated laser beam, and transforming a laser beam into a ring spot. The most popular laser lenses are described below.

    Laser Collimating Lens and Laser Focusing Lenses.
A collimating lens is a lens which is used to generate a collimated laser beam from a laser source. The focal length of a laser collimating lens can be determined based on the laser divergence angle (FWHM) and the required laser beam diameter. A laser focusing lens is a lens which is used to focus a laser beam into a small spot. The focal length of a focusing lens is determined based on the input laser beam size, spot size, and required depth of focus. Laser focusing and collimating lens types include plano-convex lenses and aspheric lenses.

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