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Spherical Bi-Concave Lenses
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Crystaltechno Ltd. manufactures spherical bi-concave lenses from fused silica, glass and different types of optical crystals.
Spherical bi-convex lenses are widely used as divergent transfer optics.
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PARAMETER |
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VALUE |
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Surface figure |
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Lambda/2 per inch |
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Scratch-Dig |
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40-20 (FS, BK7)
60-40 (CaF2, BaF2, MgF2, LiF, Ge, Si, Zinc Selenide (ZnSe) CVD)
80-50 (KRS-5)
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Diameter tolerance |
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± 0.1 mm |
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Paraxial Focal Length Tolerance |
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± 2% |
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Centration |
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less than 5 arc minutes |
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Clear aperture |
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90 % |
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Bevels |
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(0.3-0.5) mm x 45° |
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Crystaltechno LTD makes spherical bi-concave lenses from the list of optical materials below:
CaF2
BaF2
MgF2
LiF
KRS-5
BK7
Fused Silica
Si
Ge
ZnSe
Ordering Info
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