FITEC OPTICS make asphere with custom diamond turned(CNC manufacturing) as well as with molded asphere.
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Custom asphere tolerance:
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Parameter
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Commercial (standard)
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Effective Focal Length (EFL)
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± 1%
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Center Thickness (CT)
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± 0.025 mm
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Outer Diameter (OD)
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± 0.015 mm
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Wedge (arcmin)
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4
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Power/Irregularity (fringes)
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3/0.5
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Surface Roughness
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PV< 1 μm RMS<0.15μm
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Surface Quality (scratch/dig)
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40/20
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*Manufacturability depends on size & shape of the optics, as well as production volume
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Molded asphere tolerance:
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Parameter
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Commercial (standard)
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Effective Focal Length (EFL)
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± 1%
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Center Thickness (CT)
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± 0.025 mm
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Outer Diameter (OD)
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± 0.015 mm
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Wedge (arcmin)
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4
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Power/Irregularity (fringes)
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3/0.5
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Surface Roughness
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PV< 2 μm RMS<0.25μm
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Surface Quality (scratch/dig)
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60/40
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*Manufacturability depends on size & shape of the optics, as well as production volume
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