Lenses: Plano-Convex

Plano-Convex Lenses for CO2 Laser and IR Optics Systems

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

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%



Part #

Description

Diameter
(inches)

Diameter
(mm)

Focal
Length
(inches)

Working
Distance
(inches)

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

2.62

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