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Precision
Optics
Introduce
Windows
Lenses
Plano-Convex
Lenses
Double-Convex
Lenses
Plano-Concave
Lenses
Double-Concave
Lenses
Meniscus
Lenses
Cylindrical
Lenses
Achromatic
Lenses
Ring
Mount for Lenses
Prisms
Waveplates
Beamsplitters
Filters
Laser
Optics
Coloured
Optical Glass
IR
Materials
Coating
Custom
Optics
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BK7
Double-Concave Lenses
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Specifications:
Material:
BK7
Grade A Optical Glass
Design Wavelength: 546.1nm
Design Index: 1.5183¡À0.0005
Diameter Tolerance: +0.0, -0.15mm
Paraxial Focal Length: ¡À2%
Centration: 3 arc minutes
Clear Aperture: >80%
Surface Figure: l/4@632.8nm
Surface Quality: 60-40 scratch and dig
Bevel: 0.25 mm x 45¡ã
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Part
No.
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f
(mm)
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f
(mm)
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R1=R2
(mm)
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tc
(mm)
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te
(mm)
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fb
(mm)
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DV0101
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-8.0
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6.0
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8.62
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2.0
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3.0
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-8.6
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DV0102
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-12.0
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6.0
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12.77
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2.0
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2.7
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-12.6
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DV0103
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-18.0
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6.0
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18.99
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2.0
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2.5
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-18.6
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DV0104
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-10.0
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10.0
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10.70
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2.0
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4.5
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-10.6
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DV0105
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-15.0
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12.7
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15.88
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2.0
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4.6
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-15.6
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DV0106
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-20.0
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12.7
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21.07
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2.0
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4.0
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-20.6
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DV0107
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-25.0
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12.7
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26.25
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2.0
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3.6
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-25.7
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DV0108
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-30.0
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12.7
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31.44
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2.0
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3.3
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-30.7
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DV0109
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-40.0
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12.7
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41.80
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2.0
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3.0
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-40.7
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DV0110
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-50.0
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12.7
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52.17
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2.0
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2.8
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-50.7
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DV0111
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-35.0
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25.4
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36.62
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2.0
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6.5
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-35.7
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DV0112
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-50.0
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25.4
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52.17
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2.0
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5.1
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-50.7
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DV0113
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-75.0
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25.4
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78.09
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2.0
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4.1
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-75.7
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DV0114
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-100.0
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25.4
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104.00
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2.0
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3.6
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-100.7
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DV0115
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-125.0
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25.4
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129.92
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2.0
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3.2
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-125.7
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DV0116
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-150.0
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25.4
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155.83
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2.0
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3.0
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-150.7
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DV0117
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-175.0
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25.4
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181.75
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2.0
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2.9
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-175.7
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DV0118
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-200.0
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25.4
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207.66
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2.0
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2.8
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-200.7
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DV0119
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-250.0
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25.4
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259.49
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2.0
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2.6
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-250.7
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DV0120
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-300.0
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25.4
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311.32
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2.0
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2.5
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-300.7
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DV0121
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-500.0
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25.4
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518.64
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2.0
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2.3
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-500.7
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DV0122
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-1000.0
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25.4
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1036.94
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2.0
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2.2
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-1000.7
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DV0123
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-50.0
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38.0
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52.34
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3.0
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10.1
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-51.0
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DV0124
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-100.0
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38.0
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104.17
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3.0
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6.5
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-101.0
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DV0125
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-150.0
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38.0
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156.00
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3.0
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5.3
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-151.0
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DV0126
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-200.0
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38.0
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207.83
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3.0
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4.7
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-201.0
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DV0127
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-350.0
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38.0
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363.32
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3.0
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4.0
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-351.0
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DV0128
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-500.0
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38.0
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518.81
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3.0
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3.7
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-501.0
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DV0129
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-700.0
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38.0
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726.13
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3.0
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3.5
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-701.0
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DV0130
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-100.0
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50.0
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104.17
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3.0
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9.1
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-101.0
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DV0131
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-150.0
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50.0
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156.00
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3.0
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7.0
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-151.0
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DV0132
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-200.0
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50.0
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207.83
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3.0
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6.0
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-201.0
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DV0133
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-250.0
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50.0
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259.66
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3.0
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5.4
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-251.0
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DV0134
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-400.0
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50.0
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415.15
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3.0
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4.5
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-401.0
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DV0135
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-450.0
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50.0
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466.91
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3.0
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4.3
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-451.0
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DV0136
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-500.0
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50.0
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518.82
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3.0
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4.2
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-501.0
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DV0137
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-600.0
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50.0
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622.47
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3.0
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4.0
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-601.0
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DV0138
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-800.0
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50.0
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829.73
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3.0
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3.8
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-801.0
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Please
refer to the Material
Chapter for more information about BK7 glass, UV grade
fused silica, Sapphire and CaF2. |
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Please
refer to
the Glossary
and Technology
for more information about lenses. |
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Please
refer to Coating
Chapter for more infomation of coating. |
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Other
sizes and coatings are available upon request. |
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lPlease
refer to Ring
Mount for Lenses |
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