OVERVIEW

Specifications
Material	Vacuum-Grade UV Magnesium Fluoride
Wavelength Range	200 nm - 6 μm
Diameter Tolerance	+0.00/-0.10 mm
Thickness Tolerance	±0.2 mm
Focal Length Tolerance	±2% at 633 nm
Surface Quality	40-20 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 Refraction	1.376981 @ 630 nm
Coating	None

*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.

Quick Links to Other Spherical Singlets
Plano-Convex	Bi-Convex	Best Form	Plano-Concave	Bi-Concave	Positive Meniscus	Negative Meniscus

Ø1" MgF₂ Plano-Convex Lenses

Item #	Diameter	Focal Length				Radius of Curvature	Center Thickness	Edge Thickness*	Back Focal Length	Reference Drawing
Item #	Diameter	200 nm	486 nm	633 nm	2.0 µm	Radius of Curvature	Center Thickness	Edge Thickness*	Back Focal Length	Reference Drawing
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
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

Part Number	Description	Price	Availability
LA6002	Ø1" Magnesium Fluoride Plano-Convex Lens, f=50 mm	$290.00	Lead Time
LA6004	Ø1" Magnesium Fluoride Plano-Convex Lens, f=75 mm	$240.00	3-5 Days
LA6005	Ø1" Magnesium Fluoride Plano-Convex Lens, f=100 mm	$230.00	Today
LA6006	Ø1" Magnesium Fluoride Plano-Convex Lens, f=150 mm	$220.00	Today
LA6007	Ø1" Magnesium Fluoride Plano-Convex Lens, f=200 mm	$220.00	Today
LA6008	Ø1" Magnesium Fluoride Plano-Convex Lens, f=250 mm	$220.00	3-5 Days
LA6009	Ø1" Magnesium Fluoride Plano-Convex Lens, f=500 mm	$220.00	Today
LA6010	Ø1" Magnesium Fluoride Plano-Convex Lens, f=1000 mm	$220.00	Today

Magnesium Fluoride Plano-Convex Lenses

OVERVIEW

Features

GRAPHS

Ø1" MgF₂ Plano-Convex Lenses

Magnesium Fluoride Plano-Convex Lenses

OVERVIEW

Features

GRAPHS

Ø1" MgF2 Plano-Convex Lenses

Ø1" MgF₂ Plano-Convex Lenses