Products

Ball Lens

Ball lenses are commonly used for laser collimating and focusing, laser-to-fiber coupling, fiber-to-fiber coupling, Solar-photovoltaic and fiber-to-detector coupling.

Yunlang can provide spherical ball lenses and half ball lenses in a range of substrates for performance in the ultraviolet to the NIR. Such as including H-K9L(N-BK7), Sapphire, CaF2, BaF2, ZnSe or custom materials upon request.

Ball lenses feature short back focal lengths to minimize the distance needed from the ball Lens to the optical fiber. Ball lenses are commonly used to improve signal quality in fiber coupling applications, or for use in endoscopy or bar code scanning applications.

Category: Ball Lens

Description

Description

Specifications of Ball Lens (Half ball lens)

Item	Parameter (Optical glass ball lens; Half ball lens)
Material	K9 (BK7), Optical sapphire(ruby) glass, fused silica, JGS1, ZnSe, Zns, Ge, Caf2, b270, LaF52, Schott glass
Diameter	1~150mm, 1mm, 2mm, 3mm…
Dia. Tolerance	+/-0.002mm
Roundness	0.001-0.005
Surface Accuracy	<2λ
Irregularity	λ/2 @632.8nm
Surface Quality	<40/20 scratch/dig
Clear Aperture	>92%
Focal length tolerance	+/-1% (+/-5% for 400 series)
Centration	3 arc min or better
Coating	Upon customer request

Material Specification

Glass Materials	Refractive (nd)	Dispersion Coefficient(vd)	Glass Materials	Refractive (nd)	Dispersion Coefficient(vd)
H-Zlaf90	2.00069	25.43	Sapphire	1.768	72.20
H-Zlaf50D	1.804	46.58	ZnSe	2.403	N/A
H-ZF7LA	1.80518	25.46	Silicon	3.422	N/A
Fused Silica	1.458	67.70	Germanium	4.003	N/A
H-K9L(N-BK7)	1.517	64.20

Material Characteristics

Fused Silica Ball and Half-Ball Lenses: 1,Excellent UV Transmission(From 200nm to 2.2μm) 2,Low Coefficient of Thermal Expansion	Sapphire and Ruby Ball Lens(Half ball lens): 1,Excellent for Severe Environments 2,High Strength and Hardness 3,High Chemical Stability 4,Ruby Balls are easier to see
H-K9L (N-BK7) Ball Lenses: 1,Can be Used as Fiber Coupling Spheres or Collimating Lenses 2,Ideal Pre-Forms for Aspheric Lenses 3,Available in a Variety of Sizes	High Index Ball Lenses: 1,Index of Refraction of 1.8-2.0 2,High Tolerance 3,High Index for a Closer Focal Distance

Parameters Explaination:

EFL: Effective Focal Length BFL: Back Focal Length
CT : Center Thinkness C : Lens Center