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UV Fused Silica Positive Meniscus Lenses, Uncoated


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UV Fused Silica Positive Meniscus Lenses, Uncoated

TypeUncoated*
Lens ShapePositive Meniscus
Diameters Available1" or 2"
Diameter Tolerance+0.00 mm / -0.10 mm
Substrate MaterialUV Grade Fused Silica
Wavelength Range185 nm - 2.1 μm
TransmissionTInternal ≥ 88%/cm @ 185 nm
Focal Length Tolerance±1%
Surface Quality40-20 Scratch-Dig
Clear Aperture>90% of Dia.
Design Wavelength588 nm (n=1.460)
Index of Refraction
(@ Design λ)		1.460
Centration≤3 arcmin

*These lenses are also available uncoated.

Features

  • Choose from Ø1" or Ø2" Versions
  • Wavelength Range: 185 nm - 2.1 μm (uncoated)
  • Focal Lengths Available from 100.0 - 1000.0 mm
  • Fabricated from UV Grade Fused Silica
  • Spherical Surface Power: 3 Fringes
  • Spherical Surface Irregularity: λ/4

Thorlabs' UV Grade Fused Silica Positive Meniscus Lenses are available either uncoated or with a UV antireflection coating for the 290 - 370 nm range deposited on both surfaces. Compared to N-BK7, UV-grade fused silica offers high transmission deeper into the UV (down to 185 nm), better homogeneity, and a lower coefficient of thermal expansion. In addition, UV fused silica exhibits virtually no laser-induced fluorescence (as measured at 193 nm), making it an ideal choice for applications from the UV to the near IR.

Positive meniscus (convex-concave) lenses, which are thicker in the middle than at the edges and cause light rays to converge, are designed to minimize third-order spherical aberration. They are often used in conjunction with other lenses to decrease the focal length, and therefore increase the numerical aperture (NA), of an optical assembly. When used to focus a collimated beam, as shown in the diagram above, the convex side of the lens should face the source to minimze spherical aberration. Since a positive meniscus lens has a greater radius of curvature on the concave side of the lens than on the convex side, real images can be formed.

Thorlabs offers their negative meniscus lenses in Ø1 and Ø2" versions. Each size is compatible with a multitude of Thorlabs lens mounts. Please see the Mounting Options tab for details.

Optic Cleaning Tutorial
Optical Coatings and Substrates
Quick Links to Other Spherical Singlets
Plano-ConvexBi-ConvexBest FormPlano-ConcaveBi-ConcavePositive MeniscusNegative Meniscus

Below is the transmission curve for a 10 mm thick uncoated sample of UV fused silica when the incident ilght is normal to the surface. Please note that this is the measured transmission, including surface reflections.

UVFS Transmission
Click Here for Raw Data
Click to Enlarge
Recommended Mounting Options for Ø1" (25.4 mm) Lenses
LH1Adjustable Lens Mount: 0.2" (5 mm) to 1.82" (46 mm)
LH2Adjustable Lens Mount: 0.75" (19 mm) to 2.25" (57 mm)
SCL03Self-Centering Lens Mount, Ø0.15" (3.8mm) to Ø1.7" (43mm)
LMR1Fixed Lens Mount for Ø1" Optics
LMR1SØ1" Lens Mount with Internal and External SM1 Threads
SM1 Lens TubesThorlabs offers a range of lens tube designs and lengths
LM1XY or LM1XY/MTranslating Lens Mount for Ø1" Optics
HPT130 mm Cage-System-Compatible XY Translator for Ø1" Optics
VG100Adjustable-Height Optic Clamp
Recommended Mounting Options for Ø2" (50.8 mm) Lenses
LH2Adjustable Lens Mount: 0.75" (19 mm) to 2.25" (57 mm)
SCL04Self-Centering Lens Mount, Ø0.15" (3.8mm) to Ø3.0" (76mm)
LMR2Fixed Lens Mount for Ø2" Optics
LMR2SØ2" Lens Mount with Internal and External SM2 Threads
SM2 Lens TubesThorlabs offers a range of lens tube designs and lengths
LM2XY or LM2XY/MTranslating Lens Mount for Ø2" Optics
VG100Adjustable-Height Optic Clamp
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Ø1" (25.4 mm) UV Fused Silica Positive Meniscus Lenses, Uncoated
Item #DiameterFocal
Length		Radius of
Curvature 1		Radius of
Curvature 2		Center
Thickness		Edge
Thickness*		Back Focal
Length**		Reference
Drawing
LE4173 1" 100.0 mm 31.0 mm 91.2 mm 4.0 mm 2.2 mm 95.9 mm Positive Meniscus Lens Drawing
LE4197 1" 150.0 mm 47.6 mm 149.8 mm 3.2 mm 2.0 mm 146.8 mm
LE4467 1" 200.0 mm 64.2 mm 209.8 mm 2.9 mm 2.0 mm 197.2 mm
LE4329 1" 300.0 mm 97.6 mm 330.6 mm 2.6 mm 2.0 mm 297.5 mm
LE4484 1" 500.0 mm 166.8 mm 603.4 mm 2.4 mm 2.0 mm 497.8 mm
LE4950 1" 1000.0 mm 348.0 mm 1425.7 mm 2.2 mm 2.0 mm 998.0 mm

*Edge thickness given before 0.2 mm at 45o typical chamfer.
**Measured at the design wavelength, 588 nm.

Suggested Fixed Lens Mount: LMR1

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
LE4173 Support Documentation LE4173 Ø1" UV Fused Silica, + Meniscus Lens, f = 100.0 mm, Uncoated $83.40
Today
LE4197 Support Documentation LE4197 Ø1" UV Fused Silica, + Meniscus Lens, f = 150.0 mm, Uncoated $82.50
Today
LE4467 Support Documentation LE4467 Ø1" UV Fused Silica, + Meniscus Lens, f = 200.0 mm, Uncoated $82.00
Today
LE4329 Support Documentation LE4329 Ø1" UV Fused Silica, + Meniscus Lens, f = 300.0 mm, Uncoated $82.00
Today
LE4484 Support Documentation LE4484 Ø1" UV Fused Silica, + Meniscus Lens, f = 500.0 mm, Uncoated $80.00
Today
LE4950 Support Documentation LE4950 Ø1" UV Fused Silica, + Meniscus Lens, f = 1000.0 mm, Uncoated $79.60
Today
Add To Cart
Ø2" (50.8 mm) UV Fused Silica Positive Meniscus Lenses, Uncoated
Item #DiameterFocal
Length		Radius of
Curvature 1		Radius of
Curvature 2		Center
Thickness		Edge
Thickness*		Back Focal
Length**		Reference
Drawing
LE4412 2" 100.0 mm 30.6 mm 80.9 mm 10.7 mm 1.2 mm 89.0 mm Positive Meniscus Lens Drawing
LE4125 2" 150.0 mm 46.5 mm 135.3 mm 7.8 mm 2.7 mm 142.0 mm
LE4560 2" 200.0 mm 63.0 mm 193.4 mm 6.6 mm 2.9 mm 193.4 mm
LE4984 2" 300.0 mm 97.6 mm 327.6 mm 5.4 mm 3.0 mm 294.8 mm
LE4150 2" 500.0 mm 165.4 mm 582.2 mm 5.0 mm 3.6 mm 495.2 mm
LE4822 2" 1000.0 mm 356.7 mm 1580.2 mm 5.0 mm 4.3 mm 995.6 mm

*Edge thickness given before 0.2 mm at 45o typical chamfer.
**Measured at the design wavelength, 588 nm.

Suggested Fixed Lens Mount: LMR2

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
LE4412 Support Documentation LE4412 Ø2" UV Fused Silica, + Meniscus Lens, f = 100.0 mm, Uncoated $324.50
Today
LE4125 Support Documentation LE4125 Ø2" UV Fused Silica, + Meniscus Lens, f = 150.0 mm, Uncoated $291.50
Today
LE4560 Support Documentation LE4560 Ø2" UV Fused Silica, + Meniscus Lens, f = 200.0 mm, Uncoated $280.50
Today
LE4984 Support Documentation LE4984 Ø2" UV Fused Silica, + Meniscus Lens, f = 300.0 mm, Uncoated $269.50
Today
LE4150 Support Documentation LE4150 Ø2" UV Fused Silica, + Meniscus Lens, f = 500.0 mm, Uncoated $269.50
Today
LE4822 Support Documentation LE4822 Ø2" UV Fused Silica, + Meniscus Lens, f = 1000.0 mm, Uncoated $262.90
Today
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Additional Positive Meniscus Lenses
  • N-BK7, Positive Meniscus

  • UV Fused Silica, Uncoated Positive Meniscus

  • UV Fused Silica, UV Coated Positive Meniscus

  • CaF2, Positive Meniscus, Uncoated

  • CaF2, Positive Meniscus, AR Coated

  • ZnSe, Positive Meniscus

  • Spherical Singlets Lens Kits

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