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Magnesium Fluoride Plano-Convex Lenses


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Magnesium Fluoride Plano-Convex Lenses

Specifications
MaterialVacuum-Grade UV Magnesium Fluoride
Wavelength Range200 nm - 6 μm
Diameter Tolerance+0.00/-0.10 mm
Thickness Tolerance±0.2 mm
Focal Length Tolerance±2% at 633 nm
Surface Quality40-20 Scratch-Dig
Surface Flatness
(Plano Side)		λ/2
Spherical Surface Power*(Convex Side)3λ/2
Surface Irregularity
(Peak to Valley)		λ/4
Centration≤3 arcmin
Clear Aperture>90% of Diameter
Alignment of C-Axis<20 armin
Index of Refraction1.376981 @ 630 nm
CoatingNone

*Much like surface flatness for flat optics, spherical surface power is a measure of the deviation between the surface of the curved optic and a calibrated reference gauge, typically for a 633 nm source, unless otherwise stated. This specification is also commonly referred to as surface fit.

Features

  • Wavelength Range: 200 nm - 6.0 μm
  • Material: Vacuum Grade MgF2

Thorlabs' MgF2 Plano-Convex lenses are popular for many applications in the UV and IR. These lenses are an ideal choice for applications from 200 nm to 6.0 μm. Magnesium Fluoride is extremely durable in comparison to other materials that reach this far down into the UV or out into the IR. The C-axis is oriented to minimize birefringence.

Plano-Convex lenses have a positive focal length and approach best form for infinite and finite conjugate applications. These lenses focus a collimated beam to the back focus and collimate light from a point source. They are designed with minimal spherical aberration and have a focal length which can be calculated using a simplified thick lens equation:

f= R/(n-1),

where n is the index of refraction and R is the radius of curvature of the lens surface. To minimize the introduction of spherical aberration, a collimated light source should be incident on the curved surface of the lens when being focused and a point light source should be incident on the planar surface when being collimated.

Plano-Convex Lens kits are also available - please click here for information.

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

Transmission Curve for Magnesium Flouride: 1 mm Thick Uncoated Sample, Surface Reflections are Included in the Transmission Plot

Transmission Curve for Magnesium Fluoride
Click to Enlarge
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Ø1" MgF2 Plano-Convex Lenses
Item #DiameterFocal LengthRadius of
Curvature 		Center
Thickness 		Edge
Thickness* 		Back Focal
Length 		Reference
Drawing
200 nm486 nm633 nm2.0 µm
LA6002 1" 44.7 mm 49.7 mm 50.1 mm 51.4 mm 18.9 mm 6.9 mm 2.0 mm 45.0 mm Plano-Convex Lens Drawing
LA6004 1" 66.8 mm 74.4 mm 75 mm 76.9 mm 28.3 mm 5.0 mm 2.0 mm 71.4 mm
LA6005 1" 89.3 mm 99.4 mm 100.3 mm 102.8 mm 37.8 mm 4.3 mm 2.1 mm 97.1 mm
LA6006 1" 133.8 mm 148.9 mm 150.1 mm 153.9 mm 56.6 mm 3.2 mm 1.8 mm 147.7 mm
LA6007 1" 178.2 mm 198.3 mm 200 mm 205.0 mm 75.4 mm 3.2 mm 2.1 mm 197.7 mm
LA6008 1" 222.9 mm 248 mm 250.1 mm 256.4 mm 94.3 mm 2.8 mm 1.9 mm 248.0 mm
LA6009 1" 445.5 mm 495.8 mm 500 mm 512.5 mm 188.5 mm 2.6 mm 2.2 mm 498.1 mm
LA6010 1" 891.1 mm 991.6 mm 1000 mm 1024.9 mm 377.0 mm 2.4 mm 2.2 mm 998.3 mm

*Edge Thickness prior to chamfer (0.2 mm at 45° typical).

Suggested Fixed Lens Mounts: LMR1 and SM1L05

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
LA6002 Support Documentation LA6002 Ø1" Magnesium Fluoride Plano-Convex Lens, f=50 mm $290.00
3-5 Days
LA6004 Support Documentation LA6004 Ø1" Magnesium Fluoride Plano-Convex Lens, f=75 mm $240.00
3-5 Days
LA6005 Support Documentation LA6005 Ø1" Magnesium Fluoride Plano-Convex Lens, f=100 mm $230.00
Today
LA6006 Support Documentation LA6006 Ø1" Magnesium Fluoride Plano-Convex Lens, f=150 mm $220.00
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LA6007 Support Documentation LA6007 Ø1" Magnesium Fluoride Plano-Convex Lens, f=200 mm $220.00
Today
LA6008 Support Documentation LA6008 Ø1" Magnesium Fluoride Plano-Convex Lens, f=250 mm $220.00
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LA6009 Support Documentation LA6009 Ø1" Magnesium Fluoride Plano-Convex Lens, f=500 mm $220.00
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LA6010 Support Documentation LA6010 Ø1" Magnesium Fluoride Plano-Convex Lens, f=1000 mm $220.00
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Additional Plano-Convex Spherical Lenses
  • N-BK7, Plano-Convex

  • UV Fused Silica, Plano-Convex

  • CaF2, Plano-Convex

  • MgF2, Plano-Convex

  • Si, Plano-Convex

  • BaF2, Plano-Convex

  • ZnSe, Plano-Convex

  • Germanium, Plano-Convex

  • Teflon, THz Lenses

  • Spherical Singlets Lens Kits

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