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Products / Optics / Optical Lenses / Double-Convex Lenses / UV Fused Silica Double-Convex (DCX) Lenses
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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

18mm Dia. x 20mm FL, UV-AR Coated, UV Double-Convex Lens

UV Fused Silica Double-Convex (DCX) Lenses

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Stock #46-290 Other Coating Options
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C$197.40
Qty 1-5
C$197.40
Qty 6+
C$177.80
Volume Pricing
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Diameter (mm):
18.00 +0.0/-0.025
Back Focal Length BFL (mm):
17.18
Effective Focal Length EFL (mm):
20.00
Coating:
UV-AR (250-425nm)
Coating Specification:
Rabs ≤1.0% @ 250 - 425nm
Ravg ≤0.75% @ 250 - 425nm
Ravg ≤0.5% @ 370 - 420nm
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Fused Silica (Corning 7980)
Surface Quality:
40-20
Power (P-V) @ 632.8nm:
1.5λ
Irregularity (P-V) @ 632.8nm:
λ/4
Centering (arcmin):
<1
Bevel:
Protective bevel as needed
Center Thickness CT (mm):
7.64
Center Thickness Tolerance (mm):
±0.10
Edge Thickness ET (mm):
2.50
Radius R1=-R2 (mm):
17.05
Clear Aperture CA (mm):
17.00
f/#:
1.11
Focal Length Specification Wavelength (nm):
587.6
Focal Length Tolerance (%):
±1
Numerical Aperture NA:
0.45
Type:
Double-Convex Lens
Typical Energy Density Limit:
3 J/cm2 @ 355nm, 10ns
Wavelength Range (nm):
250 - 425
Damage Threshold, Reference: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification.
3 J/cm2 @ 355nm, 10ns

Regulatory Compliance

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

  • Ideal for Imaging Applications
  • Minimize Aberrations Including Spherical and Coma
  • Precision Fused Silica Substrate

TECHSPEC® UV Fused Silica Double-Convex (DCX) Lenses, also referred to as bi-convex lenses, have two positive, symmetrical faces with equal radii on both sides. These lenses are generally recommended for finite imaging applications with a conjugate ratio (ratio between object distance and image distance) between 0.2 and 5. At a conjugate ratio of 1, aberrations such as spherical aberration, chromatic aberration, coma, and distortion are minimized or cancelled due to the symmetric lens design.

UV FS Transmission Curve
UV FS Transmission Curve
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