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Double Concave Lens

The Double Concave Lenses are made from BK7 material, which are manufactured with both surfaces concave. These lenses have negative focal lengths. These lenses diverge collimated incident light and form virtual images, which are seen through the lens. They are often used to expand light or increase focal lengths in existing systems. They are used in laser beam expanders, optical character readers, viewers, and projection systems. We will provide precision grade Double Concave Lenses with tighter manufacturing tolerances.

Material:

Fused Silica or BK7

Design Wavelength:

546.1nm, n=1.46008

Diameter Tolerance:

+0.0/-0.1mm

Paraxial Focal Length:

±2%

Centration:

3 arcmin

Surface Figure :

/4 @ 632.8 nm

Surface Quality:

20/10

Clear Aperture:

>80%

Bevel:

<0.25mm X 45°

Coating:

AR coating or HR coating

  

Item#

Dia(mm)

f(mm)

R2=R2(mm)

Tc

Te

Fb

BCV1-001

6.0

15.0

15.20

2.10

1.5

14.30

BCX1-002

6.0

30.0

30.83

1.79

1.5

29.42

BCV1-101

12.7

15.0

14.65

4.89

2.0

13.27

BCV1-102

12.7

20.0

20.04

4.07

2.0

18.62

BCV1-103

12.7

25.0

25.35

3.62

2.0

23.82

BCV1-104

12.7

30.0

30.55

3.33

2.0

28.89

BCV1-105

12.7

40.0

41.02

2.99

2.0

39.04

BCV1-106

12.7

50.0

51.40

2.79

2.0

49.08

BCV1-107

12.7

75.0

77.45

2.52

2.0

74.24

BCV1-108

12.7

100.0

103.28

2.39

2.0

99.16

BCV1-201

25.4

25.0

24.72

9.02

2.0

22.24

BCV1-202

25.4

31.7

31.55

7.34

2.0

29.15

BCV1-203

25.4

35.0

35.08

6.76

2.0

32.66

BCV1-204

25.4

50.0

50.93

5.22

2.0

48.22

BCV1-205

25.4

75.0

77.09

4.11

2.0

73.63

BCV1-206

25.4

100.0

103.04

3.57

2.0

98.73

BCV1-207

25.4

125.0

129.12

3.25

2.0

123.92

BCV1-208

25.4

150.0

155.10

3.04

2.0

149.00

BCV1-209

25.4

175.0

181.13

2.89

2.0

174.12

BCV1-210

25.4

200.0

207.00

2.78

2.0

199.07

BCV1-211

25.4

250.0

258.90

2.62

2.0

249.12

BCV1-212

25.4

300.0

310.80

2.52

2.0

299.17

BCV1-213

25.4

500.0

518.30

2.31

2.0

499.21

BCV1-214

25.4

1000.0

1037.10

2.16

2.0

999.32

BCV1-301

38.0

45.0

44.87

10.44

2.0

41.46

BCV1-302

38.0

50.0

49.97

10.50

3.0

46.40

BCV1-303

38.0

100.0

102.57

6.55

3.0

97.78

BCV1-304

38.0

150.0

154.70

5.34

3.0

148.23

BCV1-305

38.0

200.0

206.70

4.75

3.0

198.46

BCV1-306

38.0

350.0

362.40

4.00

3.0

348.66

BCV1-307

38.0

500.0

518.10

3.70

3.0

498.79

BCV1-308

38.0

700.0

725.60

3.50

3.0

698.84

BCV1-309

40.0

63.5

64.42

8.27

1.9

60.70

BCV1-501

50.0

100.0

102.06

9.20

3.0

96.90

BCV1-502

50.0

150.0

154.27

7.10

3.0

147.60

BCV1-503

50.0

200.0

206.28

6.00

3.0

198.00

BCV1-504

50.0

250.0

258.22

5.40

3.0

248.20

BCV1-505

50.0

400.0

413.87

4.50

3.0

398.50

BCV1-506

50.0

450.0

465.73

4.30

3.0

448.60

BCV1-507

50.0

500.0

517.58

4.20

3.0

448.60

BCV1-508

50.0

600.0

621.28

4.00

3.0

598.70

BCV1-509

50.0

800.0

828.64

3.8

3.0

798.70

 

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