Double Concave Cylindrical Lens

An achromatic lens, also referred to as an achromat, typically consists of two optical components cemented together, The achromatic design also helps minimize spherical aberrations.

A double concave lens/mirror has a negative focal length, thereby causing collimated incident light to diverge. The double concave lens/mirror has an equal radius of curvature on both sides of the lens. They are generally used to expand light or increase focal length in the existing system, such as beam expander and projection systems.

Plano-convex lenses are positive focal length elements with one spherical surface and one flat surface. Plano convex lenses converge parallel light, correct the deflected light and convert point light sources into parallel light.

Sapphire has the characteristic of high hardness,hign strength, high transmittance,with high resistance to thermal shock quality factor, excellent performance on themal-shock resistance and abrasion resistance.