Sapphire Optical Ball Lens

Sapphire and ruby half ball hemispherical lenses feature a very short back focal length with the convenience of a flat surface for easy mounting.

Sapphire optical ball lens.

Sapphire features a high index of refraction and excellent broadband transmission characteristics. Sapphire half ball lenses are available to simplify mounting or system integration. Index of refraction of ball lens 1 5168 numerical aperture of fiber optic 0 22. Fiber optics flow meters.

Our stock ball lenses offered in quartz have excellent uv and ir transmission between 185nm to 2000 nm while our sapphire lens have a higher refractive index allowing a very short fall back length to better facilitate fibre coupling. Mechanical optical ball lens and hemispheres from dia. Precision balls optical ball applications. Knight optical supplies a range of stock ball lenses as well as bespoke designs to your own specifications.

Sapphire optics and sapphire custom shapes including sapphire balls sapphire lenses sapphire prisms and mechanical parts hold a unique place in the world of optics. Sapphire spheres ruby ball glass balls ceramic balls and fused silica balls can be made with drilled holes ground into hemispherical lenses drum ball lenses and given an ar coating to minimize reflection for optical applications. Ball half ball lenses february 17 2017 ball lenses are polished spherical lenses made by optical glass fused silica sapphire or other optical materials which has relatively high transmission rate for diode with antireflection coating. A sapphire lens ball lens and prism all exhibit exceptional performance in a number of applications that require extreme mechanical optical thermal and chemical robustness.

Equation 3 yields d d 0 33 for na 0 22. Sapphire ball lenses feature high refractive indices ideal for minimizing the distance between fiber output and lens. From figure 2 the na of an n bk7 ball lens is about 0 22 for d d 0 3 to 0 35. You would need an n bk7 ball lens with a diameter greater than 6mm 2mm 0 33 to couple a 2mm laser source into a 0 22 na fiber.

Ruby half ball lenses are easier to see and therefore easier to handle for physical applications. Sapphire and ruby ball lenses are both made from al 2 0 3. 0 15mm in sapphire balls ruby balls ceramic balls glass fused silica lens and more. Series msb spheres can also be ground and polished in half or to a specific diameter and center thickness to make an inexpensive plano convex lens.

While their physical and chemical properties are basically the same their optical properties are somewhat different. Balls hemispheres synthetic sapphire bearings and ruby bearings are recognized universally as the ideal material for instruments.