BK7 Bi-Concave Spherical Lenses size and coating of the lenses can be customized according to users’ needs
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Specification
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Material
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Schott BK7
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Design Wavelength
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632.8nm
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Focal Length Tolerance
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±1%
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Diameter Tolerance
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+0/-0.1mm
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Thickness Tolerance
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±0.1mm
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Surface Accuracy
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λ/4@632.8nm
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Surface Quality
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40-20
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Centration
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<3 arc min
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Clear Aperture
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>90%
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Bevelling
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<0.2×45º
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Coating
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According to customers’ requirements
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Model
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Dia(mm)
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EFL(mm)
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R1=R2(mm)
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BFL(mm)
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Tc(mm)
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Te(mm)
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01D1225
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12.70
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-25.00
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-26.17
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-25.81
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2.50
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4.10
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01D1230
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12.70
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-30.00
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-31.41
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-30.97
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3.00
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4.30
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01D1250
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12.70
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-50.00
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-52.10
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-51.15
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3.50
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4.30
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01D2550
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25.40
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-50.00
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-52.01
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-50.98
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3.00
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6.10
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01D2575
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25.40
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-75.00
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-77.86
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-76.15
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3.50
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5.60
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01D25100
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25.40
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-100.00
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-103.69
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-101.31
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4.00
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5.60
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