Bk7 Double Convex Spherical Lens Use for Focusing and Imaging

Alensis a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while acompound lens consists of several simple lenses (elements), usually arranged along a common axis. Lenses are made from materials such as glass or plastic, and are groundandpolishedormouldedto a desired shape. A lens can focus light to form animage, unlike aprism, which refracts light without focusing. Devices that similarly focus or dispersewaves and radiation other than visible light are also called lenses, such asmicrowavelenses,electron lenses, acoustic lenses, orexplosive lenses.
Double Convex Spherical Lensare fabricated with the identical convex surface on both sides of the lens. Due to the symmetry, aberrations such as coma, distortion and chromaticaberration are almost cancelled out. These lenses may be combined with other lenses to form complex imaging systems.Bi-convex lenses are useful for a wide range of finite conjugate or illumination applications. These lenses are manufactured from BK7A or Fused Silica. Lenses are supplieduncoated. These bi-convex lenses may be combined with other lenses to form complex imaging systems. Anti-reflection coatings are available. Please contact the Star Optic'ssalesteam for moreinformation about coatings.Specifications:MaterialBK7, Fused Silica, SF11, CaF2, Sapphire, etc.
Dimension Tolerance+0/-0.1(General)
+0/-0.02(High Precision)Thickness Tolerance±0.1mmDesign Wavelength546.1nmSurface Quality60/40(General)
10/5(High Precision)Flatnessλ/4@633nm(General)
λ/10@633nm(High Precision)Centration<3arc minutesFocal Length Tolerance±2%Clear Aperture>90%ChamferProtective<0.5mmx45degCoatingUncoated, AR, PR, HR, etc.
Standard products:Part No.materialD(mm)f(mm)R1=R2(mm)Tc(mm)Te(mm)fb(mm)DCXD25.4F25.4N-BK725.425.424.719222.2DCXD25.4F35N-BK725.43535.096.8232.7DCXD25.4F50N-BK725.45050.925.2248.3DCXD25.4F75N-BK725.47577.044.1273.6DCXD25.4F100N-BK725.4100103.053.6298.8DCXD25.4F125N-BK725.4125129.023.32123.9DCXD25.4F150N-BK725.4150154.9732149DCXD25.4F200N-BK725.4200206.842.82199DCXD25.4F250N-BK725.4250258.72.62249.1DCXD25.4F300N-BK725.4300310.552.52299.2DCXD25.4F2500N-BK725.4500517.912.32499.2DCXD25.4F1000N-BK725.410001036.232.22999.3DCXD25.4F25.4-FSUVFS25.425.421.2210.4221.2DCXD25.4F35-FSUVFS25.43530.997.4232.4DCXD25.4F50-FSUVFS25.45045.15.7248DCXD25.4F75-FSUVFS25.47568.324.4273.5DCXD25.4F100-FSUVFS25.410091.423.8298.7DCXD25.4F125-FSUVFS25.4125114.53.42123.8DCXD25.4F150-FSUVFS25.4150137.523.22148.9DCXD25.4F200-FSUVFS25.4200183.582.92199DCXD25.4F250-FSUVFS25.4250229.612.72249.1DCXD25.4F300-FSUVFS25.4300275.642.62299.1DCXD25.4F500-FSUVFS25.4500459.712.42499.2DCXD25.4F1000-FSUVFS25.41000919.822.22999.2