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All Products / Optics / Optical Lenses / Achromatic Lenses / Precision Aspherized Achromatic Lenses
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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

25mm Dia. x 20mm EFL Precision Aspherized Achromatic Lens

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Stock #85-301 3-4 days
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£998.75
Qty 1-5
£998.75
Qty 6+
£899.30
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Diameter (mm):
25.00 +0.0/-0.1
Effective Focal Length EFL (mm):
20.00
Back Focal Length BFL (mm):
8.56
Focal Length Specification Wavelength (nm):
587.6
Clear Aperture CA (mm):
22.5
Centering (arcmin):
≤3
Center Thickness CT (mm):
23.20
Center Thickness CT 1 (mm):
15.00
Center Thickness CT 2 (mm):
8.2
Edge Thickness ET (mm):
11.75
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-PK51 / S-NPH2
Surface Quality:
20-10
f/#:
0.8
Numerical Aperture NA:
0.63
Coating:
MgF2 (400-700nm)
Coating Specification:
Ravg ≤1.75% @ 400 - 700nm
Type:
Achromatic Lens
Wavelength Range (nm):
450 - 700
Asphere Figure Error, RMS @ 632.8nm:
0.8λ

Regulatory Compliance

RoHS:
Compliant
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Certificate of Conformance:
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Product Family Description

  • All Glass Color-Corrected Asphere
  • Ideal for Imaging and Biotech Applications
  • MgF2 Coated

Featuring an all glass design, TECHSPEC® Precision Aspherized Achromatic Lenses are truly achromatic, with less than 10μm of lateral chromatic aberration. These achromatic lenses are diffraction limited over the full visible spectrum, and have high numerical apertures for increased light throughput and small spot sizes. TECHSPEC® Precision Aspherized Achromatic Lenses are ideal for fluorescence microscopy, low signal-to-noise imaging applications, and multiple laser biotech applications.

CT: Center Thickness, ET: Edge Thickness, R: Radius, P: Principal Plane, BFL: Back Focal Length, EFL: Effective Focal Length
CT: Center Thickness, ET: Edge Thickness, R: Radius, P: Principal Plane, BFL: Back Focal Length, EFL: Effective Focal Length