The description of "6 * 45 side lens" may refer to an optical lens with a rectangular shape and dimensions of 6 millimeters (width) x 45 millimeters (length). This type of lens is typically used in optical systems to change the direction of light propagation, focus or scatter light, or achieve other optical effects.

Here are some possible features and applications of this type of side lens:

Size: The size of the lens is 6mm x 45mm, but the specific size and shape may vary depending on the manufacturer and model.

Optical effects: Side lenses can be used to achieve different optical effects, such as focusing, scattering, refraction, reflection, or changing the direction of light propagation. Its design and curvature will determine its function.

Application: This type of lens can be used in various applications, including lighting systems, cameras, laser systems, projectors, glasses, displays, laser printers, etc., providing specific optical functions as needed.

Material: Optical lenses are usually made of various transparent materials, such as glass, plastic, or other optical materials. The selection of materials will affect the performance and optical characteristics of the lens.

Design: The design of a lens depends on the desired optical effect, which can be designed with different shapes and curvatures such as convex, concave, and planar lenses.

If you need more specific information or have questions about specific applications, it is recommended to contact the optical equipment supplier or manufacturer for detailed information, specifications, and performance data about the 6 * 45 side lens.