Ball lens commonly used in the optical fiber coupling, laser collimating device, Optical Measurement System, it has a shorter focal length and the characteristics of small size.
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Material: UV grade Fused Silica |
Design Wavelength: @587.6nm |
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Dia. tolerance: +/-0.005mm |
Sphericity: ±0.003mm |
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Irregularity: λ/4@632.8nm |
Surface Quality: 40/20 |
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Coating: None |
EFL=nD/4(n-1) BFL=EFL-D/2 |
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N.A.=2d(n-1)/nD |
D : Ball lens diameter |
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d: Entrance pupil |
EFL: Ball lens' EFL |
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BFL: Ball lens' BFL |
n: Ball lens' refraction index |
