VUV-UV CaF2 Meniscus Lenses
Positive & Negative Meniscus

 

Vacuum Ultraviolet (VUV-UV) Positive & Negative Meniscus Lenses are available in select VUV Grade Calcium Fluoride (CaF2) for a wide range of VUV-UV optical applications including VUV-UV instrumentation or VUV-UV lasers.  VUV-UV CaF2 Positive & Negative Meniscus Lenses have two spherical surfaces with different Radii curved outward (Convex) and curved inward (Concave).
  


VUV CaF2 Positive Meniscus Lenses (convex-concave design), which are thicker in the middle than at the edges, cause light rays to converge and are designed to minimize third-order spherical aberration. When used to focus a collimated beam, the convex side of the lens should face the source to minimize spherical aberration. They are often used in conjunction with other lenses to decrease the focal length, and therefore increase the numerical aperture (NA) of a VUV-UV optical assembly.  As positive meniscus lenses have a greater radius of curvature on the concave side of the lens than on the convex side, real images can be formed.

VUV CaF2 Negative Meniscus Lenses (concave-convex design), which are thinner in the middle than at the edges, cause light rays to diverge and are designed to minimize third-order spherical aberration. When used to diverge light, the convex surface should face the beam to minimize spherical aberration. They are often used in conjunction with other lenses to increase the focal length, and therefore decrease the numerical aperture (NA) of a VUV-UV optical assembly.

Also see our VUV Grade MgF2 & CaF2 Plano-Convex Spherical Lenses & VUV Grade CaF2 Plano-Concave Spherical Lenses  & VUV Grade CaF2 Bi-Convex & Bi-Concave Spherical Lenses.
 

VUV Grade Calcium Fluoride (CaF2): CaF2 exhibits good transmission properties from ~ 145nm Vacuum UV (VUV) to ~ 8.0um in the Infrared.  CaF2 is a relatively soft crystalline material and care should be taken as CaF2 is sensitive to mechanical and thermal shock.  CaF2 is a cubic single crystal optical material.
 

More information can be found on our Material Properties Page.   For more information about Spherical Lenses, refer to our Optics Tutorial page
                               

 

SPECIFICATIONS

Material: VUV Grade CaF2
Effective Focal Length (EFL) Tol.: ± 2% 
Radius of Curvature (ROC) Tol.: within ±1%     
Diameter (Dia = Ø) Tolerance: ±0.25mm
Thickness Tolerance: ±0.25mm  
Surface Figure: ~L/2 @ 633nm nominal
Surface Finish:  40-20 both surfaces
Clear Aperture: central 85%
Centration: < 3 arc minutes 
Chamfer: ~ 0.30mm @45 deg.

(All dimensions in mm)

 

   

                VUV CaF2 Positive Meniscus Lens                           VUV CaF2 Negative Meniscus Lens

 

 

                                                        VUV CaF2 Positive Meniscus Lens                           

DIA  Ø (mm)

RADIUS 
     R1 

RADIUS 
     R2

EFL @ 157nm

EFL @ 193nm

EFL @ 248nm


BACK FOCAL LENGTH

 (BFL @ 193nm)


 CENTER 
   THICK

    (CT) 

DESCRIPTION

 MATERIAL

  PRICE  


 PRODUCT #  ORDER

 12.7mm

7.5mm 

72.4mm

14.6mm

16.3mm

17.5mm

12.9mm

4.7mm

VUV-UV CaF2 
POS. Meniscus Lens

VUV CaF2

$365.00

CF1275PMEN

12.7mm

15.0mm

52.8mm

36.5mm

40.7mm

43.7mm

38.0mm

3.0mm

VUV-UV CaF2 
POS. Meniscus
Lens

VUV CaF2

$365.00

CF1215PMEN

12.7mm

20.0mm

49.1mm

58.3mm

65.0mm

69.8mm

61.8mm

3.0mm

VUV-UV CaF2 
POS. Meniscus
Lens

VUV CaF2

$365.00

CF1220PMEN

25.4mm

15.0mm

147.0mm

29.2mm

32.6mm

34.9mm

26.1mm

8.9mm

VUV-UV CaF2
POS. Meniscus
Lens

VUV CaF2

$435.00

CF2515PMEN

25.4mm

15.5mm

55.2mm

36.3mm

40.6mm

43.6mm

34.4mm

7.1mm

VUV-UV CaF2
POS. Meniscus
Lens

VUV CaF2

$435.00

CF2516PMEN

25.4mm

15.5mm

28.0mm

 53.6mm

60.2mm

64.9mm

53.0mm

5.6mm

VUV-UV CaF2 
POS. Meniscus
Lens

VUV CaF2

$435.00

CF2517PMEN

25.4mm

20.0mm

36.8mm

 72.3mm

80.9mm

87.0mm

75.5mm

4.0mm

VUV-UV CaF2 
POS. Meniscus
Lens

VUV CaF2

$435.00

CF2520PMEN

25.4mm

35.0mm

78.6mm

 109.3mm

122.1mm

131.0mm

117.5mm

4.0mm

VUV-UV CaF2 
POS. Meniscus
Lens

VUV CaF2

$435.00

CF2535PMEN

25.4mm

40.0mm

75.9mm

 145.6mm

162.6mm

174.5mm

157.2mm

4.0mm

VUV-UV CaF2 
POS. Meniscus
Lens

VUV CaF2

$435.00

CF2540PMEN

25.4mm

125.0mm

317.8mm

 366.1mm

408.0mm

437.4mm

403.8mm

4.0mm

VUV-UV CaF2 
POS. Meniscus
Lens

VUV CaF2

$435.00

CF25125PMEN

25.4mm

150.0mm

290.8mm

 548.9mm

611.9mm

656.0mm

606.7mm

4.0mm

VUV-UV CaF2 
POS. Meniscus
Lens

VUV CaF2

$435.00

CF25150PMEN

25.4mm

250.0mm

638.5mm

 732.7mm

816.5mm

875.0mm

812.3mm

4.0mm

VUV-UV CaF2 
POS. Meniscus
Lens

VUV CaF2

$435.00

CF25250PMEN 

 

                                                        VUV CaF2 Negative Meniscus Lens

DIA  Ø (mm)

RADIUS 
     R1 

RADIUS 
     R2

EFL @ 157nm

EFL @ 193nm

EFL @ 248nm


BACK FOCAL LENGTH

 (BFL @ 193nm)


 CENTER 
   THICK

    (CT) 

DESCRIPTION

 MATERIAL

  PRICE  


 PRODUCT #  ORDER

 12.7mm

95.6mm 

7.5mm

-14.7mm

-16.4mm

-17.5mm

-16.2mm

2.0mm

VUV-UV CaF2 
NEG. Meniscus Lens

VUV CaF2

$365.00

CF1295NMEN

12.7mm

20.4mm

9.8mm

-37.6mm

-41.5mm

-44.1mm

-39.5mm

3.0mm

VUV-UV CaF2 
NEG. Meniscus
Lens

VUV CaF2

$365.00

CF1220NMEN

12.7mm

33.7mm

16.2mm

-59.5mm

-66.0mm

-70.4mm

-64.0mm

3.7mm

VUV-UV CaF2 
NEG. Meniscus
Lens

VUV CaF2

$365.00

CF1233NMEN

25.4mm

308.3mm

15.5mm

-29.4mm

-32.7mm

-35.0mm

-32.6mm

4.0mm

VUV-UV CaF2
NEG. Meniscus
Lens

VUV CaF2

$435.00

CF2530NMEN

25.4mm

68.5mm

15.5mm

-36.7mm

-41.0mm

-43.9mm

-40.2mm

4.0mm

VUV-UV CaF2
NEG. Meniscus
Lens

VUV CaF2

$435.00

CF2568NMEN

25.4mm

30.8mm

14.8mm

-56.0mm

-62.0mm

-66.1mm

-59.3mm

5.6mm

VUV-UV CaF2 
NEG. Meniscus
Lens

VUV CaF2

$435.00

CF2531NMEN

25.4mm

42.0mm

20.2mm

-73.1mm

-81.1mm

-88.0mm

-78.5mm

4.0mm

VUV-UV CaF2 
NEG. Meniscus
Lens

VUV CaF2

$435.00

CF2542NMEN

25.4mm

64.1mm

30.8mm

-111.0mm

-123.1mm

-132.0mm

-120.6mm

4.0mm

VUV-UV CaF2 
NEG. Meniscus
Lens

VUV CaF2

$435.00

CF2564NMEN

25.4mm

86.2mm

41.4mm

-147.2mm

-163.7mm

-175.5mm

-161.2mm

4.0mm

VUV-UV CaF2 
NEG. Meniscus
Lens

VUV CaF2

$435.00

CF2586NMEN

25.4mm

218.3mm

105.1mm

-367.4mm

-409.0mm

-438.0mm

-406.6mm

4.0mm

VUV-UV CaF2 
NEG. Meniscus
Lens

VUV CaF2

$435.00

CF25218NMEN

25.4mm

328.2mm

158.1mm

-550.6mm

-613.1mm

-656.9mm

-610.8mm

4.0mm

VUV-UV CaF2 
NEG. Meniscus
Lens

VUV CaF2

$435.00

CF25328NMEN

25.4mm

438.1mm

211.1mm

-733.9mm

-817.2mm

-875.7mm

-815.0mm

4.0mm

VUV-UV CaF2 
NEG. Meniscus
Lens

VUV CaF2

$435.00

CF25438NMEN

 

 

                               

 

                                                                                  CaF2 Refractive Index 

Wavelength, nm 157 193 248 308 350
Refractive Index (n) 1.559 1.501 1.468 1.453 1.445

                                                

                                                

                                                   
              eSource Optics / PMB 126 / 1225 Providence Rd. / Whitinsville, MA 01588

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