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Spherical Optics, Achromat Lenses (Doublets and Triplets)
Manufacturing Tolerances
Dimensions from ø1 to ø100 mm as well as rectangular shape
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Tolerances
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Commercial quality
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Precision quality
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Manufacturing limits
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GlassQuality
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Nd
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+/-0.001
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+/-0.0005
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Melt controlled
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Vd
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+/-0.8%
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+/-0.3%
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Melt controlled
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Diameter(mm)
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+0/-0.10
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+0/-0.02
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+0/-0.01
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Center Thickness(mm)
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±0.10
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±0.05
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±0.01
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SAG (mm)
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±0.050
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±0.025
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±0.010
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Scratch-Dig
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80-50 / 60-40
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40-20
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10-5
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Power (fringe)
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5 arc min
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3 arc min
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1arc min
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Irregularity (fringe)
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L/2
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L/4
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L/8
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Wedge Lens (ETD, mm)
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0.05
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0.01
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Facility controlled
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Bevels
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Upon requirement
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No bevel
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Coatings
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Upon requirement
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