双凹透镜
Double-concave lenses are normally used in combination with other lenses. Typical applications include laser beam expanders, optical character readers, viewers, and projection systems.
Specifications
Material: .............................BK7, Silica, CaF2, Silicon, etc.
Diameter Tolerance: .....................................+0.0, -0.1 mm
tc tolerance: .......................................................±0.1mm
Clear Aperture: ........................................................>85%
Surface Quality: .......................................................40-20
Flatness: .....................................................N=2, △N=0.5
Centration: ....................................................±3 arc mins
Size (φ): ............................................3 to 200mm or larger
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Part No.
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F(mm)
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Dia(mm)
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Rad1=Rad2(mm)
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Tc(mm)
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Te(mm)
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fb(mm)
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DCCL 101
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-10.0
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10.0
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10.7
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2.0
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4.5
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-10.6
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DCCL 102
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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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DCCL 103
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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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DCCL 104
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-100.0
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25.4
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104.0
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2.0
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3.6
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-100.7
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Note: Other sizes and specifications are available upon request.
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