Glass ball lens

Material

BK7, Borosilicate, Fused Silica, Sapphire, CaF2, ZnSe, Ruby, B270, Quartz

Diameter

φ 0.4-30mm

Surface quality

60/40, 40/20, 20/10

Dia tolerace

±0.2μm

Sphericity

<0.2μm

Glass ball lens information

Glass ball lenses are widely used for coupling fiber and semiconductor lasers, or photodetectors.  It’s much smaller than a normal lens, and it’s completely polished, so be careful when using it. But it can reduce the size and weight of the device. With a positive focal length, used at the unit conjugate point, can eliminate all kinds of aberration.

ball lens detail

Material used for ball lenses

BK7(K9), uv grade fused silica(UVFS), sapphire is the most common material for making ball lenses.
1. UVFS is stable used for UV, VIS and NIR applications.
2. BK7(K9) is used for visible light.
3. Sapphire provide better transmission, which is used for UV and IR applications.

Applications:

  • Fiber optic connector
  • Ball check valve
  • LED encapsulating
  • Bar code scanner
  • Parallel photogeneration

Glass ball lens data

ball lenses
ball lens 2
ball lens 1

D: glass ball lens diameter
d: light input diameter
EFL: effective focal length
BFL: back focal length
n: refractive index of optical material
NA: numerical aperture

EFL=nD/4(n-1)
BFL=EFL-D/2
NA=2d(n-1)/nD

Glass ball lens, K9 and uv grade fused silica

Item No.MaterialDiameter(mm)EFL(mm)BFL(mm)
GBL001H-K9L1.000.730.23
GBL002H-K9L2.001.470.47
GBL003H-K9L3.002.200.70
GBL004H-K9L4.002.930.93
GBL005H-K9L5.003.671.17
GBL006H-K9L6.004.401.40
GBL007H-K9L7.005.141.64
GBL008H-K9L8.005.871.87
GBL009H-K9L9.006.602.10
GBL010H-K9L10.007.342.34
GBL011UVFS1.000.790.29
GBL012UVFS2.001.590.59
GBL013UVFS3.002.390.89
GBL014UVFS4.003.181.18
GBL015UVFS5.003.981.48
GBL016UVFS6.004.771.77
GBL017UVFS7.005.572.07
GBL018UVFS8.006.362.36
GBL019UVFS9.007.162.66
GBL020UVFS10.007.952.95

send your inquiry today