China Glass Bk7 Biconvex Lenses Optical Lens

Spherical biconvex lenses of BK7 are mostly used for monochromatic lights, such as laser beams or Fraunhofer lines. They are useful when lights from point sources are converged or images are relayed to other optical systems.

The lenses are polished carefully by selecting materials (striae, bubbles, inclusions, and homogeneity) and paying attention to dispersion (digs, scratches, and glosses) to prevent troubles with coherent light

Uncoated and coated with broadband multilayer AR coatings for visible are available.

Standard Specifications:

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

BK7 Grade A Optical Glass
+0.0, -0.1mm
633nm
1.5183±0.0005
±2%
3 arc minutes
>85%
40-20 scratch and dig
lambda/4
<0.25mm X 45°
available upon request

Standard Glass BK7 Biconvex Lenses

Dia(mm)

f(mm)

R1=R2(mm)

tc(mm)

te(mm)

fb(mm)

Product Number

10.0

10.0

9.45

4.9

2.0

8.2

ICC-BICXB1010

12.7

15.0

14.66

4.9

2.0

13.3

ICC-BICXB1011

12.7

20.0

20.01

4.0

2.0

18.6

ICC-BICXB1012

12.7

25.0

25.28

3.6

2.0

23.8

ICC-BICXB1013

12.7

30.0

30.52

3.3

2.0

28.9

ICC-BICXB1014

12.7

40.0

40.95

3.0

2.0

39.0

ICC-BICXB1015

12.7

50.0

51.35

2.8

2.0

49.1

ICC-BICXB1016

12.7

75.0

77.30

2.6

2.0

74.1

ICC-BICXB1017

12.7

100.0

103.25

2.4

2.0

99.2

ICC-BICXB1018

20.0

25.4

25.265

6.1

2.0

23.3

ICC-BICXB1019

20.0

22.0

21.577

6.9

2.0

19.6

ICC-BICXB1020

21.0

20.0

19.239

8.2

2.0

17.1

ICC-BICXB1021

22.4

40.0

40.57

5.1

1.9

38.3

ICC-BICXB1022

25.0

125.0

129.132

3.2

2.0

123.9

ICC-BICXB1023

25.4

31.7

31.56

7.3

2.0

29.2

ICC-BICXB1024

25.4

35.0

35.09

6.8

2.0

32.7

ICC-BICXB1025

25.4

50.0

50.92

5.2

2.0

48.3

ICC-BICXB1026

25.4

75.0

77.04

4.1

2.0

73.6

ICC-BICXB1027

25.4

100.0

103.05

3.6

2.0

98.8

ICC-BICXB1028

25.4

125.0

129.02

3.3

2.0

123.9

ICC-BICXB1029

25.4

150.0

154.97

3.0

2.0

149.0

ICC-BICXB1030

25.4

175.0

180.91

2.9

2.0

174.0

ICC-BICXB1031

25.4

200.0

206.84

2.8

2.0

199.0

ICC-BICXB1032

25.4

250.0

258.70

2.6

2.0

249.1

ICC-BICXB1033

25.4

300.0

310.55

2.5

2.0

299.2

ICC-BICXB1034

25.4

500.0

517.91

2.3

2.0

499.2

ICC-BICXB1035

25.4

1000.0

1036.23

2.2

2.0

999.3

ICC-BICXB1036

25.4

25.4

24.712

9.0

2.0

22.2

ICC-BICXB1037

30.0

50.0

50.731

6.5

2.0

47.8

ICC-BICXB1038

30.0

500.0

518.306

2.4

2.0

499.2

ICC-BICXB1039

35.0

110.0

113.31

4.7

2.0

108.4

ICC-BICXB1040

38.0

50.0

49.97

10.5

3.0

46.4

ICC-BICXB1041

38.0

100.0

102.52

6.5

3.0

97.8

ICC-BICXB1042

38.0

150.0

154.57

5.4

3.0

148.2

ICC-BICXB1043

38.0

200.0

206.51

4.8

3.0

198.4

ICC-BICXB1044

38.0

350.0

362.13

4.0

3.0

348.7

ICC-BICXB1045

38.0

500.0

517.67

3.7

3.0

498.8

ICC-BICXB1046

38.0

700.0

725.02

3.5

3.0

698.8

ICC-BICXB1047

38.0

45.0

44.836

10.4

2.0

41.4

ICC-BICXB1048

38.1

50.8

51.063

9.3

1.9

47.6

ICC-BICXB1049

40.0

63.5

64.38

8.3

1.9

60.7

ICC-BICXB1050