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Double-Concave Lens

Double-Concave Lens, also named Bi-Concave Lens, is used to divergent light. The Bi-Concave is best used when the input beam is converging. It is used in beam expanders,. Projection optics systems, optical viewers and optical charater readers etc.

Applications:

Beam Expanders
Projection Optics System
Imaging Optics Systems
Optical Viewers
Optical Character Readers

BK7 Double-Concave Lens
 
Specifications:
Material BK7 grade A optical glass
Design Wavelength 546.1nm
Design Index 1.51830.0005
Diameter Tolerance +0.00/-0.15mm
Paraxial Focus Length 2% @546.1nm
Centration
<3 arc minutes
Clear Aperture >Central 85% of diameter
Surface Figure /4@632.8nm
Surface Quality 60-40 S/D
Protective Bevel <0.25mm x 45
 
BK7 Double-Concave Lens Standard Products:
Part No.
f (mm)
(mm)
R1=R2(mm)
tc (mm)
te (mm)
fb (mm)

LDV0101

-10.0

10.0

10.700

2.0

4.5

-10.6

LDV0201

-15.0

12.7

15.880

2.0

4.6

-15.6

LDV0202

-20.0

12.7

21.070

2.0

4.0

-20.6

LDV0204

-30.0

12.7

31.440

2.0

3.3

-30.7

LDV0205

-40.0
12.7
41.80
2.0
3.0
-40.7

LDV0206

-50.0
12.7
52.17
2.0
2.8
-50.7

LDV0301

-35.0
25.4
36.62
2.0
6.5
-35.7

LDV0302

-50.0
25.4
52.17
2.0
5.1
-50.7

LDV0304

-100.0
25.4
104.00
2.0
3.6
-100.7

LDV0308

-200.0
25.4
207.66
2.0
2.8
-200.7

LDV0311

-500.0
25.4
518.64
2.0
2.3
-500.7

LDV0312

-1000.0
25.4
1036.94
2.0
2.2
-1000.7

LDV0401

-50.0
38.0
52.34
3.0
10.1
-51.0

LDV0402

-100.0
38.0
104.17
3.0
6.5
-101.0

LDV0405

-200.0
38.0
207.83
3.0
4.7
-201.0

LDV0407

-500.0
38.0
518.81
3.0
3.7
-501.0

LDV0408

-700.0
38.0
726.13
3.0
3.5
-701.0

LDV0501

-100.0
50.0
104.17
3.0
9.1
-101.0

LDV0503

-200.0
50.0
207.83
3.0
6.0
-201.0

LDV0505

-400.0
50.0
415.15
3.0
4.5
-401.0

LDV0507

-500.0
50.0
518.82
3.0
4.2
-501.0

LDV0508

-600.0
50.0
622.47
3.0
4.0
-601.0

LDV0509

-800.0
50.0
829.73
3.0
3.8
-801.0
 
Fused Silica Double-Concave Lens
 
Specifications:
Material UV grade fused silica
Design Wavelength 546.1nm
Design Index 1.460080.00005
Diameter Tolerance +0.00/-0.15mm
Paraxial Focus Length 2% @546.1nm
Centration
<3 arc minutes
Clear Aperture >Central 85% of diameter
Surface Figure /4@632.8nm
Surface Quality 60-40 S/D
Protective Bevel <0.25mm x 45
 
Fused Silica Double-Concave Lens Standard Products:
Part No.
f (mm)
(mm)
R1=R2(mm)
tc (mm)
te (mm)
fb (mm)

LDV1201

-15.0

12.7

14.110

2.0

5.0

-15.7

LDV1202

-20.0

12.7

18.710

2.0

4.2

-20.7

LDV1203

-25.0

12.7

23.320

2.0

3.7

-25.7

LDV1204

-30.0

12.7

27.920

2.0

3.5

-30.7

LDV1205

-40.0

12.7

37.12

2.0

3.1

-40.7

LDV1301

-25.0

25.4

23.320

2.0

9.5

-25.7

LDV1303

-50.0

25.4

46.32

2.0

5.6

-50.7

LDV1305

-100.0

25.4

92.33

2.0

3.8

-100.7

LDV1307

-200.0

25.4

184.35

2.0

2.9

-200.7

LDV1309

-300.0

25.4

276.36

2.0

2.6

-300.7

LDV1310

-500.0

25.4

460.40

2.0

2.4

-500.7

LDV1311

-1000.0

25.4

920.48

2.0

2.2

-1000.7

LDV1401

-50.0

38.0

46.48

3.0

11.1

-51.0

LDV1402

-100.0

38.0

92.49

3.0

6.9

-101.0

LDV1403

-150.0

38.0

138.50

3.0

5.6

-151.0

 
Note: Cutting Lens, Square Lens, Rectangle Lens and Coatings are available upon request.

Metal Mount is available upon request. Lenses with material B270, Pyrex, Sapphire, Silicon, Germanium, CaF2, ZnSe etc are also available upon request.

The general tolerance specifications above provide a guideline regarding manufacturing capabilities for optics ranging in size from diameter 0.6-350mm. The manufacturing limits are not absolute; tighter tolerances may be possible. Part specific tolerances may vary depending on component size, shape, and/or material.

 

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