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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

20mm Dia., 0.66 Numerical Aperture Uncoated, Aspheric Lens

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Stock #66-309 3-4 days
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Other Coating Options
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Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
€122,50 €245,00
Qty 1-5
€122,50 €245,00
Qty 6+
€98,00 €196,00
Volume Pricing
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Diameter (mm):
20.00 +0.0/-0.1
Effective Focal Length EFL (mm):
15.00 @ 587.6nm
Numerical Aperture NA:
0.66
Back Focal Length BFL (mm):
9.16
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
L-BAL35
Aspheric Design Wavelength (nm):
587.6
Asphere Figure Error, RMS @ 632.8nm:
1.2λ
Coating:
Uncoated
Centering (arcmin):
≤5
Surface Quality:
60-40
Clear Aperture CA (mm):
18
Edge Thickness ET (mm):
3.05
Center Thickness CT (mm):
9.60 ±0.1
f/#:
0.75
Bevel:
Protective bevel as needed
Radius R2 (mm):
200
Shape of Back Surface:
Convex
Type:
Aspheric Lens
Wavelength Range (nm):
330 - 2400
Conjugate Distance:
Infinite
Power (diopters):
66.67

Regulatory Compliance

RoHS 2015:
Compliant
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Reach 219:
Compliant
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Certificate of Conformance:
View
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Product Family Description

  • Diameters from 10 to 200mm
  • Focal Lengths from 7.5 to 300mm
  • Broadband AR Coatings Available

TECHSPEC® Aspheric Lenses are designed to focus light while eliminating spherical aberration from divergent light sources in applications including focusing the output of a laser diode. Aspheric lenses can increase the numerical aperture of a lens while minimizing system aberrations. Aspheric lenses may also reduce the number of elements needed in a multi-element system. Aspheric lenses can reduce overall system weight while providing advantages such as increasing throughput or simplifying assembly.

TECHSPEC Aspheric Lenses feature low f/#’s for optimum light gathering performance. Prescription data is available to easily integrate these aspheric lenses into an optical system. These lenses have also been computer optimized to eliminate spherical aberration while minimizing higher order aberrations. VIS coating option provides less than 1.5% reflection from 425 – 675nm. NIR coating option provides less than 1.5% reflection from 600 – 1050nm. Contact our sales department for volume pricing or for help specifying a custom aspheric lens.