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MgF2 (Magnesium Fluoride)

MgF2MgF2 (Magnesium Fluoride) is used for optical elements in both the infrared and ultraviolet. Its useful transmission range is from 0.11um to 7.5um. It is the only one optical material combining wide spectral transmittance band with birefringence phenomenon. MgF2 is one of the lowest index infrared materials, second only to Lithium Fluoride. It is resistant to thermal and mechanical shock. The material is twice as hard as Calcium Fluoride but only half as hard as Germanium.

 

MgF2 Characteristics & Transmission Curve  


Bluebean Optical's MgF2 Lenses specifications:


  Material

 MgF2

  Design Wavelength

 200nm,486nm,633nm, 2.0um

  Focal Length Tolerance

 ±2%

  Diameter Tolerance

 +0.0/- 0.1 mm

  Thickness Tolerance

 ±0.2mm

  Surface Accuracy

 λ/2@632.8nm

  Surface Quality

 60-40

  Centration

 3 arc min

  Clear aperture

 > 80%

  Bevel

 0.2mm×45°

  Coating

 upon request

 

MgF2 Plano-convex Spherical Lenses:

 

Part No.

Dia

EFL

R

Tc

Te

BFL(200nm)

200nm

486nm

633nm

2.0μm

PCXM25050

25.4

44.64

49.68

50.1

51.35

18.89

6.9

2

39.79

PCXM25075

25.4

66.83

74.36

75

76.86

28.27

5

2

63.31

PCXM25100

25.4

89.37

99.45

100.3

102.79

37.81

4.3

2.1

86.35

PCXM25150

25.4

133.74

148.83

150.1

153.83

56.58

3.2

1.8

131.49

PCXM25200

25.4

178.2

198.31

200

204.97

75.4

3.2

2.1

175.96

PCXM25250

25.4

222.84

247.98

250.1

256.32

94.28

2.8

1.9

220.88

PCXM25500

25.4

445.51

495.76

500

512.43

188.49

2.6

2.2

443.68

PCXM25101

25.4

891.02

991.53

1000

1024.87

376.98

2.4

2.2

889.34