Vacuum Ultraviolet (VUV-UV) Plano-Convex Spherical Lenses are available select VUV Grade Magnesium Fluoride (MgF2) and VUV Grade Calcium Fluoride (CaF2) materials. 

Magnesium Fluoride:  MgF2 exhibits high transmission properties from ~ 120nm Vacuum UV (VUV) to ~ 6.0um in the Infrared.  MgF2 is a relatively hard crystalline material resistant to mechanical and thermal shock.  MgF2 is a birefringent crystal typically oriented along the optical axis to avoid birefringent effects in windows & lenses. 

Calcium Fluoride:  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.

VUV-UV Plano-Convex Spherical Lenses have one flat (plano) surface and one spherical surface curved outward (convex) to converge the VUV-UV transmitted rays from an object, thus forming a real or virtual image of that object.  A VUV-UV Plano-Convex Spherical Lens is used as a simple imaging lens to focus, collect and collimate VUV-UV light.  These lenses have positive Effective Focal Lengths and are generally used as a focussing element within an VUV-UV optical assembly, VUV-UV instrument or VUV-UV laser.

For more information about Spherical Lenses, refer to our Optics Tutorial page. 
                               

SPECIFICATIONS Material : VUV Grade MgF2 and CaF2 Nominal Focal Length (NFL) Tol.: ± 3%      Diameter (Dia = Ø) Tolerance: ± 0.25mm Thickness Tolerance: ± 0.25mm   Surface Figure: ~L/10 @ 633 nm nominal Surface Finish:  20-10 both surfaces Clear aperture: central 85% Centration: < 3 arc minutes  Chamfer: ~ 0.30mm @45 deg. (All dimensions in mm)

DIA  Ø	RADIUS (R)	NFL  @ 157nm	NFL  @ 193nm	NFL  @ 248nm	NFL  @ 308nm	DESCRIPTION	MATERIAL	PRODUCT #	PRICE	ORDER**
12.7	11.9	23.8	24.1	25.4	25.9	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF1225LCX	$595.00	CF1225LCX
25.4	23.6	47.2	48.0	50.3	51.3	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF2550LCX	$545.00	CF2550LCX
25.4	35.0	70.0	71.1	74.6	76.1	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF2575LCX	$415.00	CF2575LCX
25.4	46.4	92.8	94.3	99.0	101.0	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF2510LCX	$390.00	CF2510LCX
38.1	46.4	92.8	94.3	99.0	101.0	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF3810LCX	$725.00	CF3810LCX
25.4	70.6	141.2	143.5	150.5	153.5	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF2515LCX	$390.00	CF2515LCX
50.8	70.6	141.2	143.5	150.5	153.5	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF5015LCX	$1245.00	CF5015LCX
25.4	93.2	186.4	189.4	198.7	202.6	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF2520LCX	$390.00	CF2520LCX
50.8	93.2	186.4	189.4	198.7	202.6	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF5020LCX	$1150.00	CF5020LCX
25.4	118.0	236.0	239.8	251.6	258.7	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF2525LCX	$390.00	CF2525LCX
50.8	118.0	236.0	239.8	251.6	258.7	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF5025LCX	$1150.00	CF5025LCX
25.4	103.0	222.0	240.7	248.2	254.3	VUV-UV MgF2 Spherical Lens	VUV MgF2	MF2525LCX	$515.00	MF2525LCX
50.8	103.0	222.0	240.7	248.2	254.3	VUV-UV MgF2 Spherical Lens	VUV MgF2	MF5025LCX	$975.00	MF5025LCX
25.4	154.5	333.0	361.2	383.0	394.1	VUV-UV MgF2 Spherical Lens	VUV MgF2	MF2538LCX	$515.00	MF2538LCX
50.8	154.5	380.0	361.2	383.0	394.1	VUV-UV MgF2 Spherical Lens	VUV MgF2	MF5038LCX	$975.00	MF5038LCX
25.4	231.8	463.6	471.1	494.2	504.0	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF2550LCX	$390.00	CF2550LCX
50.8	231.8	463.6	471.1	494.2	504.0	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF5050LCX	$1150.00	CF5050LCX
25.4	257.5	625.0	602.0	638.3	656.9	VUV-UV MgF2 Spherical Lens	VUV MgF2	MF2562LCX	$515.00	MF2562LCX
50.8	257.5	625.0	602.0	638.3	656.9	VUV-UV MgF2 Spherical Lens	VUV MgF2	MF5062LCX	$975.00	MF5062LCX
25.4	469.5	939.0	954.3	1001.1	1021.0	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF25100LCX	$390.00	CF25100LCX
50.8	469.5	939.0	954.3	1001.1	1021.0	VUV-UV CaF2 Spherical Lens	VUV CaF2	CF50100LCX	$1150.00	CF50100LCX
25.4	515.0	1110.0	1241.0	1276.8	1272.0	VUV-UV MgF2 Spherical Lens	VUV MgF2	MF25125LCX	$515.00	MF25125LCX
50.8	515.0	1110.0	1241.0	1276.8	1272.0	VUV-UV MgF2 Spherical Lens	VUV MgF2	MF50125LCX	$975.00	MF50125LCX

 

               ** Contact us with any questions or to place an order.

                    CaF2 Refractive Index                                       MgF2 Refractive Index 

Wavelength, nm	157	193	248	308	350
Refractive Index (n)	1.464	1.428	1.415	1.405	1.387

   

  * Also see our UV Fused Silica & BK7 Glass Spherical Lenses

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