China Glass Bk7 Plano-Concave Lenses Optical Lenses

Spherical plano concave lenses of BK7 are mostly used for monochromatic lights, such as laser beams or Fraunhofer lines.

These lenses are useful when parallel beams are converged or lights from point sources are converted to parallel beams, namely at infinite conjugate ratios.

Non-coated and AR coated products are available.

Standard Specifications:

Optical Material:
Diameter Tolerance:
Design Wavelength:
Design Index:
Paraxial Focal Length:
Centration:
Clear Aperture:
Surface Quality:
Wavefront Distortion:
Bevel:
Coating:

BK7 Grade A Optical Glass
+0.0, -0.1mm
546.10nm
1.5183±0.0005
±2%
3 arc minutes
>85%
60-40 scratch and dig
lambda/4 at 632.8nm
<0.25mm X 45°
available upon request

Standard Glass BK7 Plano-Concave Lenses:

Dia(mm)

f(mm)

R1(mm)

te(mm)

tc(mm)

Fb(mm)

Product Number

4.0

-6.0

3.101

1.50

0.77

-5.0

ICC-PLCAB0001

5.0

-10

5.17

1.64

1.0

-8.91

ICC-PLCAB0002

6.0

-8.0

4.15

3.3

2.0

-5.8

ICC-PLCAB0004

6.0

-10.0

5.18

3.0

2.0

--8.0

ICC-PLCAB0005

6.0

-12.0

6.22

2.8

2.0

10.2

ICC-PLCAB0006

6.0

-18.0

9.33

2.5

2.0

-16.4

ICC-PLCAB0007

8.0

-10.0

5.18

3.1

2.0

-8.0

ICC-PLCAB0008

8.0

-18.0

9.33

2.9

2.0

-16.1

ICC-PLCAB0009

7.5

-13.0

6.743

2.0

0.86

-11.7

ICC-PLCAB0010

10.0

-15.0

7.78

3.8

2.0

-12.5

ICC-PLCAB0011

10.0

-22.0

11.40

3.1

1.9

-20.0

ICC-PLCAB0012

12.7

-15.0

7.78

5.3

2.0

-11.5

ICC-PLCAB0013

12.7

-20.0

10.37

4.2

2.0

-17.2

ICC-PLCAB0014

12.7

-25.0

12.96

3.7

2.0

-22.6

ICC-PLCAB0015

12.7

-30.0

15.55

3.4

2.0

-27.8

ICC-PLCAB0016

12.7

-40.0

20.73

3.0

2.0

-38.0

ICC-PLCAB0017

12.7

-50.0

25.92

2.8

2.0

-48.2

ICC-PLCAB0018

12.7

-75.0

38.87

2.5

2.0

-73.4

ICC-PLCAB0019

12.7

-100.0

51.83

2.4

2.0

-98.4

ICC-PLCAB0020

14.0

-25.0

12.968

4.0

1.90

-22.4

ICC-PLCAB0021

17.0

-34.0

17.637

4.20

2.00

-31.2

ICC-PLCAB0022

18.5

-30.0

15.562

5.0

2.00

-26.7

ICC-PLCAB0023

20.0

-40.0

20.73

4.5

1.9

-37.0

ICC-PLCAB0024

20.0

-35.0

18.155

4.20

1.20

-32.2

ICC-PLCAB0025

20.0

-50.0

25.936

4.00

2.00

--47.4

ICC-PLCAB0026

22.0

-34.0

17.637

5.80

1.90

30.2

ICC-PLCAB0027

22.4

-40.0

20.73

5.3

2.0

-36.5

ICC-PLCAB0028

22.4

-50.0

25.92

4.6

2.0

--47.0

ICC-PLCAB0029

22.4

-60.0

31.10

4.1

2.0

57.3

ICC-PLCAB0030

22.4

-100.0

51.83

3.2

2.0

-97.9

ICC-PLCAB0031

22.4

-75

38.905

3.50

1.85

-72.7

ICC-PLCAB0032

22.4

-70

36.309

3.83

2.05

-67.5

ICC-PLCAB0033

25.0

-700.0

363.105

2.20

2.00

-689.6

ICC-PLCAB0034

25.4

-25.4

13.17

11.7

2.0

-17.7

ICC-PLCAB0035

25.4

-35.0

18.14

7.2

2.0

-30.3

ICC-PLCAB0036

50.0

-25.4

25.92

5.3

2.0

-46.5

ICC-PLCAB0037

60.0

-25.4

31.10

4.7

2.0

-56.9

ICC-PLCAB0038

70.0

-25.4

36.28

4.3

2.0

-67.2

ICC-PLCAB0039

75.0

-25.4

38.87

4.1

2.0

-72.3

ICC-PLCAB0040