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All Products / Optics / Optical Lenses / Specialty Lenses / Positive Meniscus Lenses
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25.4mm Dia x 300mm FL, Uncoated Meniscus Lens

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Stock #72-434 New 3-4 days
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£21.25
Qty 1-9
£21.25
Qty 10+
£19.13
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Diameter (mm):
25.40 +0.00/-0.10
Effective Focal Length EFL (mm):
300.00 @ 587.6nm
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-BK7
f/#:
11.81
Numerical Aperture NA:
0.04
Coating:
Uncoated
Type:
Meniscus Lens
Back Focal Length BFL (mm):
297.07 @ 587.6nm
Center Thickness CT (mm):
2.50 ±0.10
Centering (arcmin):
<3
Clear Aperture CA (mm):
22.86
Design Wavelength DWL (nm):
587.6
Edge Thickness ET (mm):
1.96
Radius R1 (mm):
87.13
Radius R2 (mm):
196.972
Surface Quality:
40-20
Power (P-V) @ 632.8nm:
3 Rings
Irregularity (P-V) @ 632.8nm:
0.5 Rings

Regulatory Compliance

RoHS:
Compliant
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Product Family Description

  • Positive Meniscus Lens Designs
  • Minimize Spherical Aberration and Reduce Spot Sizes
  • 350 – 2,200nm Wavelength Range

Positive Meniscus Lenses are convex-concave lenses manufactured from N-BK7 optical glass and are designed to minimize spherical aberration and reduce spot sizes in focusing applications. When used to focus a collimated beam, the lenses should be oriented with the convex surface towards to light source to minimize spherical aberration. Combining a positive meniscus lens with another lens in a multi-element optical design will allow for a shortening of the focal length and an increase in the numerical aperture (NA) of a system without introducing significant spherical aberrations. Positive Meniscus Lenses are available with focal lengths ranging from 100 to 300mm in 25.4mm diameters sizes. allowing for easy integration into benchtop systems.