Plano convex lenses are used in many applications including telescopes, collimators, magnifiers, optical transceivers and condensers. These lenses have a plane and a convex surface. They may be combined with other lenses to form complex imaging system.
Symmetric convex lenses are fabricated with the identical convex surface on both sides of the lens. Due to the symmetry, aberrations such as coma, distortion and chromatic aberration are almost cancelled out. These lenses may be combined with other lenses to form complex imaging systems.
Plano concave lenses are manufactured with one concave surface and one plane surface. They have negative focal lengths. These lenses are often used to expand light or to increase focal lengths in existing systems.
Symmetric concave lenses are manufactured with both concave surfaces. They have negative focal lengths. These lenses are often used to expand light or to increase focal lengths in existing systems. Also, they can be used in laser beam expander, optical characterreaders, viewers, and projection systems..
Meniscus lenses can be used with another lens to produce longer or shorter focal lengths. These lenses do not introduce additional spherical aberration or coma in the systems.
The material of Calcium Fluoride has a wide rang of spectrum (from 130nm to 9400nm) and lower refractive index. They can be used as ultra-violet and infra-red optics, achromatic lenses in un-visible range.Because of the material with the characteristics of high thermal expansion coefficient and low heat conduction, they are hard to manufacture. But BTMT is able to produce commonly grade and laser grade Calcium Fluoride lenses.
UV Grade lenses are precision manufactured using HPFS Fused Silica Standard Grade. In order to provide excellent transmission characteristics and higher operating temperature, synthetic fused silica lenses also exhibit an exceptional inclusion specification and chemical purity. These lenses make a superior choice for many laser and imaging applications, particularly those involving ultraviolet wavelength. BTMT can offer the laser grade surface quality and tight radius tolerance.