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Aspheric Lenses

Aspheric lenses are designed to be diffraction limited. They usually achieve a smaller spot size than both the plano-convex and positive meniscus lens. This provides the highest power density at the lens workpiece with equivalent focal length.

Specifications

Specifications
Standards
Effective Focal Length (EFL) Tolerance
±2%
Dimensional Tolerance
Diameter: +0.000”-0.005”
Thickness: ±0.003”
Edge Thickness Variation (ETV)
<= 0.0005”
Clear Aperture (polished)
90% of diameter
Surface Figure at 0.63µm
Varies depending upon radius
Scratch-Dig
40-20
AR Coating Reflectivity per Surface at 10.6µm
<= 0.20%
 

Parts Information

Part #
Description
Diameter
(inches)
Diameter
(mm)
Focal
Length
796278
ZnSe
1.1”
27.94
1.5”
942147
ZnSe
1.1”
27.94
1.5”
684500
ZnSe
1.1”
27.94
2.5”
679268
ZnSe
1.5”
38.10
1.5”
739932
ZnSe
1.5”
38.10
5.0”
Cylinder Lenses

As the name suggests, cylindrical lenses are either round or rectangular objects with cylindrically shaped surfaces. They differ from spherical lenses in that they focus a beam to a focal line rather than a focal point.

Transmission is improved by applying an anti-reflection coating on both sides, and multilayer coatings are available for various areas of the light spectrum. Cylindrical lenses can be made from ZnSe, Ge, Si, and other IR materials.

Applications include laser scanners, laser diode systems, spectrophotometers, projectors, and optical data storage and retrieval systems.

Meniscus Lenses

Meniscus lenses are designed to minimize spherical aberration producing a minimum focal spot size for incoming collimated light. In addition to the standard focal lengths listed below, II-VI maintains an extensive inventory of test plates and tooling, resulting in no additional tooling charges for focal length fabrication. Besides the plano-convex, meniscus, and aspheric lens shapes offered in this catalog, II-VI routinely fabricates biconvex and negative focal length lenses upon request. Our in-house optical engineers can design the component or optical system which provides the exact performance you require. Please contact our sales and engineering staff for a quotation.

Specifications

Specifications
Standards
Effective Focal Length (EFL) Tolerance
±2%
Dimensional Tolerance
Diameter: +0.000”-0.005” 
Thickness: ±0.010”
Edge Thickness Variation (ETV)
<= 0.002”
Clear Aperture (polished)
90% of diameter
Surface Figure at 0.63µm
Varies depending upon radius
Scratch-Dig
20-10
AR Coating Reflectivity per Surface at 10.6µm
<= 0.20%

Parts Information

Part #
Description
Diameter
(inches)
Diameter
(mm)
Focal
Length
Edge
Thickness
(inches)
Edge
Thickness
(mm)
247275
ZnSe
0.5
12.7
1.5”
0.060
1.52
994141
ZnSe
1.0
25.4
1.0”
0.085
2.16
350342
ZnSe
1.0
25.4
2.5”
0.085
2.16
376587
ZnSe
1.0
25.4
5.0”
0.085
2.16
566650
ZnSe
1.1
27.94
1.5”
0.085
2.16
932739
ZnSe
1.1
27.94
2.5”
0.085
2.16
801758
ZnSe
1.1
27.94
5.0”
0.085
2.16
285767
ZnSe
1.5
38.1
2.5”
0.085
2.16
507790
ZnSe
1.5
38.1
5.0”
0.236
5.99
406294
ZnSe
1.5
38.1
5.0”
0.290
7.37
767963
ZnSe
1.5
38.1
5.0”
0.354
8.99
452726
ZnSe
1.5
38.1
7.5”
0.125
3.18
784964
ZnSe
1.5
38.1
7.5”
0.236
5.99
702232
ZnSe
1.5
38.1
7.5”
0.290
7.37
570721
ZnSe
1.5
38.1
7.5”
0.354
8.99
935669
ZnSe
2.0
50.8
5.0”
0.100
2.54
695399
ZnSe
2.0
50.8
7.5”
0.380
9.65
296875
ZnSe
2.0
50.8
10.0”
0.100
2.54
490154
ZnSe
2.5
63.5
5.0”
0.160
4.06
596352
ZnSe
2.5
63.5
7.5”
0.160
4.06
286449
ZnSe
2.5
63.5
10.0”
0.160
4.06

 

MP-5 Ultra-Low Absorption Lenses

THE BEST ... NOW EVEN BETTER. II-VI Infrared’s MP-5 is an ultra-low absorbing lens that ships directly from the factory as a standard OEM CO2 laser component. Its superior features include a patented coating design enabling lower thermal distortion, visible transmission for reduced set-up time, and easy detection of thermally induced stress. The MP-5 is backed by over a decade of proven performance, and this ultra-low absorbing lens is designed, produced, and supported by II-VI Infrared, the world leader in CO2 laser optics. A specially coated zinc selenide (ZnSe) focusing lens, the MP-5 is available in both 1.5” and 2.0” diameters, and ships in 14 standard replacement lens configurations for most popular OEM laser models.

Specifications

Specifications
Standards
Typical Absorption < 0.10%*
Dimensional Tolerance Diameter: +0.000”-0.005”
Thickness: ±0.010”
Edge Thickness Variation (ETV)  
  90% of diameter
Scratch-Dig 40-20
* total guaranteed absorption: <= 0.13%

Parts Information

Part # Description Diameter
(inches)
Diameter
(mm)
Focal
Length
Edge
Thickness
(inches)
Edge
Thickness
(mm)
Working
Distance
794914 ZnSe PO/CX* 1.5 38.1 - 0.280 7.11 5.0”
204518 ZnSe PO/CX* 1.5 38.1 - 0.280 7.11 7.5”
106106 ZnSe PO/CX* 1.5 38.1 5.0” 0.300 7.62 -
383862 ZnSe PO/CX* 1.5 38.1 7.5” 0.300 7.62 -
635061 ZnSe PO/CX* 2.0 50.8 7.5” 0.310 7.88 -
392125 ZnSe PO/CX* 2.0 50.8 7.5” 0.380 9.65 -
528717 ZnSe Meniscus 1.5 38.1 5.0” 0.236 5.99 -
312503 ZnSe Meniscus 1.5 38.1 5.0” 0.290 7.37 -
123397 ZnSe Meniscus 1.5 38.1 5.0” 0.354 8.99 -
714512 ZnSe Meniscus 1.5 38.1 7.5” 0.236 5.99 -
474644 ZnSe Meniscus 1.5 38.1 7.5” 0.290 7.37 -
602033 ZnSe Meniscus 1.5 38.1 7.5” 0.354 8.99  

 

Plano-Convex Lenses

Plano-convex lenses, the most economical transmissive focusing elements available, are ideally suited for laser heat treating, welding, cutting, and infrared radiation collection where spot size or image quality is not critical. They are also the economical choice in high f-number, diffraction limited systems where lens shape has virtually no effect on system performance.

For proper performance with a plano-convex lens, the curved surface should face toward the incoming collimated beam or the longer conjugate distance (the object and image distances together are referred to as the conjugate distance).

In addition to the standard focal lengths listed here, II-VI maintains an extensive inventory of test plates and tooling. This enables fabrication of many other focal lengths without additional tooling charges.

Besides the plano-convex, meniscus, and aspheric lens shapes offered in this catalog, II-VI routinely fabricates biconvex and negative focal length lenses upon request. Our in-house optical engineers can design the component or optical system which provides the exact performance you require. Please contact our sales and engineering staff for a quotation.

Specifications

Specifications
Standards
Effective Focal Length (EFL) Tolerance
±2%
Dimensional Tolerance
Diameter: +0.000”-0.005”
Thickness: ±0.010”
Edge Thickness Variation (ETV)
<= 0.002”
Clear Aperture (polished)
90% of diameter
Surface Figure at 0.63µm
Plano: 1 fringe Power
1/2 fringe Irregularity

Radius: varies depending upon radius

Scratch-Dig
20-10
AR Coating Reflectivity per Surface at 10.6µm
<= 0.20%

Parts Information

Part #
Description
Diameter
(inches)
Diameter
(mm)
Focal
Length
Working
Distance
Edge
Thickness
(inches)
Edge
Thickness
(mm)
123265
ZnSe
0.50
12.7
1.0”
-
0.060
1.52
379095
ZnSe
0.75
19.05
1.0”
-
0.085
2.16
104370
ZnSe
1.0
25.4
2.5”
-
0.085
2.16
614868
ZnSe
1.0
25.4
5.0”
-
0.102
2.59
949585
ZnSe
1.0
25.4
10.0”
-
0.111
2.82
696289
ZnSe
1.1
27.94
2.5”
-
0.085
2.16
561067
ZnSe
1.1
27.94
5.0”
-
0.160
4.06
774048
ZnSe
1.1
27.94
7.5”
-
0.106
2.69
982910
ZnSe
1.1
27.94
10.0”
-
0.109
2.77
803557
GaAs
1.5
38.1
2.5”
-
0.0799
2.03
101766
ZnSe
1.5
38.1
2.5”
-
0.300
7.62
975597
GaAs
1.5
38.1
3.5”
-
0.354
8.99
441406
ZnSe
1.5
38.1
3.75”
-
0.086
2.18
941031
ZnSe
1.5
38.1
-
5.0”
0.280
7.11
578662
ZnSe
1.5
38.1
5.0”
-
0.300
7.62
464497
ZnSe
1.5
38.1
-
7.5”
0.280
7.11
306068
ZnSe
1.5
38.1
7.5”
-
0.300
7.62
892020
ZnSe
2.0
50.8
7.5”
-
0.310
7.87
232771
ZnSe
2.0
50.8
7.5”
-
0.380
9.65
236670
ZnSe
2.5
63.5
10.0”
-
0.390
9.90
Aspheric Lenses
Aspheric lenses are designed to be diffraction limited. They usually achieve a smaller spot size than both the plano-convex and positive meniscus lens. This provides the highest power density at the lens workpiece with equivalent focal length.... Read More
Cylinder Lenses
As the name suggests, cylindrical lenses are either round or rectangular objects with cylindrically shaped surfaces. They differ from spherical lenses in that they focus a beam to a focal line rather than a focal point. Transmission is imp... Read More
Meniscus Lenses
Meniscus lenses are designed to minimize spherical aberration producing a minimum focal spot size for incoming collimated light. In addition to the standard focal lengths listed below, II-VI maintains an extensive inventory of test plates and tool... Read More
MP-5 Ultra-Low Absorption Lenses
THE BEST ... NOW EVEN BETTER. II-VI Infrared’s MP-5 is an ultra-low absorbing lens that ships directly from the factory as a standard OEM CO2 laser component. Its superior features include a patented coating design enabling lower thermal distort... Read More
Plano-Convex Lenses
Plano-convex lenses, the most economical transmissive focusing elements available, are ideally suited for laser heat treating, welding, cutting, and infrared radiation collection where spot size or image quality is not critical. They are also the ... Read More
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