Optical Lenses
A Biconvex Lens, also known as a Double Convex Lens, is an optical lens with two identical spherical sides that have the same curvature radii. The major uses of Biconvex lenses include laser beam modulation, light focus, and imaging. Biconvex lenses have positive focal lengths and converge collimated light to a point. When the absolute finite conjugate ratio (the absolute conjugate ratio is the ratio between object distance and image distance in absolute value) is equivalent to or near 1:1, biconvex lenses are recommended, and the phrase "near 1:1" here means biconvex lenses are the best option for conjugate ratios between 1:5 and 5:1. If not, plano-convex lenses are preferable since their asymmetric shapes help to reduce spherical aberrations. The focal lengths of the biconvex lenses could be calculated using the formula: f= (R1*R2)/((n-1) *(R2-R1)).
Shalom EO offers stocked N-BK7 Biconvex Lenses, Stocked UV Fused Silica Biconvex Lenses, and Custom Biconvex Lenses. Regarding the N-BK7 Biconvex Lenses, within our stock list, a wide range of focal lengths of 10-1000mm and diameters of 6.0-50.8mm are available. Besides the uncoated versions, we also provide standard N-BK7 double convex lenses with three kinds of broadband AR coatings: 350-650nm, 650-1050 nm, and 1050-1580 nm to increase the transmission and elevate the efficiencies of utilization. Regarding the UV Fused Silica Biconvex Lenses, a wide range of focal lengths of 10-1000mm and diameters of 5.0-50.8mm are available. The UV Fused Silica double convex lenses in our stock list are uncoated, to further enhance the transmission of the UV Fused Silica double convex lenses, designed coatings could be tailored according to customers’ requirements. Custom biconvex lenses made from BaF2, CaF2, MgF2, Ge, ZnSe, Sapphire, and other optical materials are also accessible upon your request.
