MgF2 plano concave lens

Magnesium Fluoride(MgF2) Plano-Concave Lenses

Magnesium fluoride has good transmittance in the ultraviolet, visible and infrared fields and is widely used in scientific and technical fields such as lasers, infrared optics, ultraviolet optics and high energy detectors. Compared to other materials, magnesium fluoride materials are particularly durable in the deep UV and far IR wavelength ranges.

Magnesium fluoride plano-concave lenses are highly sought after for many UV and IR applications, and are particularly suitable for applications in the 200 nm - 6.0 μm wavelength range. MgF2 plano-convex lens is a positive lens used in optical instrument, laser system, infrared optics, UV optics etc.

Our Company can provide  Magnesium Fluoride Plano-Concave Lenses with diameters from 2-300mm and thicknesses from 0.12-60mm (accuracy up to 20-10, 1/10L@633nm),coating AR, BBAR, AF or upon request.

 

Technical parameters of MgF2 Plano-Concave Lens

Diameter

2-300mm

Focal length

15-5000mm

Thicknesses

0.12-60mm

Dimension tolerance

+0/-0.1mm

Thickness tolerance

±0.1mm

Surface quality (scratch &   dig)

60-40, 40-20, or better

Surface accuracy

λ/2, λ/4 or better

Parallelism

3' ,30''

Bevel

0.1~0.3mm x 45 degree

Clear aperture

>85%,>90%

Coating

AR coating or cutom

 

Material properties of MgF2

Optical Properties

Transmission Range

0.12-9μm

Transmittance

>90%@0.193-6μm

Refractive Index

NO=1.566,Ne=1.568@0.13μm

NO=1.334,Ne=1.343@5μm

Reflection Loss

11.2%@0.12nm(both surfaces)

5.7%@0.22μm(both surfaces)

5.1%@1μm(both surfaces)

Absorption Coefficienet

40×10-3@2.7μm

Structure

square crystal system

Cleavage Planes

<100>

Physical Properties

Density[g/cm3]

3.177

Melting Point [℃]

1255

ThermalConductivity [W/(m×K)]

21 //c, 33.6⊥c @ 300K

Thermal Expansion [10-6/K]

13.7//c, 8.9 ⊥c @ 373k

Knoop Hardness [kg/mm2]

415

Specific Heat Capacity [J/(kg×K)]

1003

Dielectric Constant

4.87 //c, 5.44⊥c @ 1MHz

Young's Modulus (E) [GPa]

138.5

Shear Modulus(G) [GPa]

54.66

Bulk modulus(K) [GPa]

101.32

Poisson Coefficient

0.276

Chemical Properties

Solubility / g/L

0.002g @ 20℃

Molecular Weight / g/mol

62.3018

 

Transmission curve

 

Magnesium fluoride (MgF2) is a birefringent crystal with excellent optical properties in the ultraviolet band, which is the known optical crystal in the ultraviolet cutoff band.Magnesium fluoride is popular in many UV and IR applications and is ideal for applications in the 200nm-6um.Compared to other materials, magnesium fluoride is particularly durable in the deep ultraviolet and far infrared.

 

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Typical size of MgF2 Plano-Concave Lens

Part No

Diamm)

FL

(mm)

CT    (mm)

ET    (mm)

Wavelength (um)

Radius  (mm)

Surface quality

NOVAMPC

2-200

15-5000

0.12-60

0.12-60

Customized

Customized

60-40