Optical Lenses
Plano-concave Lens is a bulk optical singlet with a flat side and a convex side, which contribute to a negative focal length and a negative spherical aberration. A plano concave lens diverges collimated light beams from a virtual focus and could be used to spread a collimated light beam, increase the focal length of an optical instrument, etc. Plano-concave lenses are often incorporated into Galilean beam expanders, also as components to balance out the spherical aberration, improving image quality. When the absolute conjugate ratio is greater than 5:1(that is, the absolute value of objective distance: image distance), a Plano-concave lens is an excellent option to decrease spherical aberration, coma, and distortion.
Hangzhou Shalom EO offers stocked and custom Plano-concave Lenses, where you can browse and shop Off-the-Shelf N-BK7 Plano Concave Lenses, Off-the-Shelf UVFS Plano Concave Lenses, Off-the-Shelf CaF2 Plano Concave Lenses, and custom Plano concave lenses made from a wide assortment of optical materials, including sapphire, ruby, Flint Glass/BaF2/Ge/Si, etc. Shalom EO is a proficient and capable supplier and manufacturer of optical lens components. Shalom EO also leverages a stringent inspection procedure to ensure that the actual parameters of the lenses abide by our published specifications. Our inspection procedure includes an in-process checking stage of the optical properties of lenses and a final test of coatings, dimension precision, and the visual observation of scratches/digs, apertures, inclusions, etc.
We provide stocked and custom N-BK7 Plano-concave Lenses with a diameter range of 0.5-300mm, which ensure simple incorporation into various instruments like laser scanners, remote sensing, and imaging instruments, fiber lasers, interferometers, etc. The focal lengths of the stocked N-BK7 Plano-concave lenses differ from -25mm to -100mm, while other focal lengths could be customized. These N-BK7 lenses feature λ/4-λ irregularities and 40/20 scratch/dig. Plano Concave Lenses made from Corning High Purity UV Fused Silica Glass (Corning HPFS Glass), or JGS1 with excellent mechanical and chemical rigidity, are available in high-precision versions with irregularities of λ/10, and surface qualities of 10/5 S/D, and normal versions with irregularities of λ/4-λ, and surface qualities of 40/20. Our CaF2 Plano concave lenses (standard) have diameters ranging from 12.7mm to 25.4mm and focal lengths ranging from -18mm to -500mm. These stock CaF2 plano-convex lenses are currently available in uncoated versions, but custom coatings, including Broadband AR Coatings (BBAR) with superior broadband performance, V coatings with minimized reflection over a narrow waveband, and MgF2 with high price-competitiveness, are all procurable through inquiries.
