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.
●Beam Expanders
●Projection Optics System
●Imaging Optics Systems
●Optical Viewers
●Optical Character Readers
BK7 Double-Concave Lens
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Specifications:
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Material
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BK7 grade A optical glass
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Design Wavelength
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546.1nm
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Design Index
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1.5183±0.0005
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Diameter Tolerance
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+0.00/-0.15mm
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Paraxial Focus Length
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±2% @546.1nm
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Centration
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<3 arc minutes
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Clear Aperture
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>Central 85% of diameter
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Surface Figure
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λ/4@632.8nm
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Surface Quality
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60-40 S/D
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Protective Bevel
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<0.25mm x 45°
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BK7 Double-Concave Lens Standard Products:
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Part No.
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f (mm)
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φ(mm)
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R1=R2(mm)
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tc (mm)
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te (mm)
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fb (mm)
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LDV00101
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-10.0
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10.0
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10.700
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2.0
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4.5
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-10.6
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|
LDV00201
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-15.0
|
12.7
|
15.880
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2.0
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4.6
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-15.6
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|
LDV00202
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-20.0
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12.7
|
21.070
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2.0
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4.0
|
-20.6
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|
LDV00204
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-30.0
|
12.7
|
31.440
|
2.0
|
3.3
|
-30.7
|
|
LDV00205
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-40.0
|
12.7
|
41.80
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2.0
|
3.0
|
-40.7
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|
LDV00206
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-50.0
|
12.7
|
52.17
|
2.0
|
2.8
|
-50.7
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|
LDV00301
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-35.0
|
25.4
|
36.62
|
2.0
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6.5
|
-35.7
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|
LDV00302
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-50.0
|
25.4
|
52.17
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2.0
|
5.1
|
-50.7
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|
LDV00304
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-100.0
|
25.4
|
104.00
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2.0
|
3.6
|
-100.7
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|
LDV00308
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-200.0
|
25.4
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207.66
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2.0
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2.8
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-200.7
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LDV00311
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-500.0
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25.4
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518.64
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2.0
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2.3
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-500.7
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LDV00312
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-1000.0
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25.4
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1036.94
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2.0
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2.2
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-1000.7
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LDV00401
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-50.0
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38.0
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52.34
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3.0
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10.1
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-51.0
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LDV00402
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-100.0
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38.0
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104.17
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3.0
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6.5
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-101.0
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LDV00405
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-200.0
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38.0
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207.83
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3.0
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4.7
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-201.0
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LDV00407
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-500.0
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38.0
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518.81
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3.0
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3.7
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-501.0
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LDV00408
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-700.0
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38.0
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726.13
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3.0
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3.5
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-701.0
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LDV00501
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-100.0
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50.0
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104.17
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3.0
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9.1
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-101.0
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LDV00503
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-200.0
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50.0
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207.83
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3.0
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6.0
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-201.0
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LDV00505
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-400.0
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50.0
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415.15
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3.0
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4.5
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-401.0
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LDV00507
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-500.0
|
50.0
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518.82
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3.0
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4.2
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-501.0
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LDV00508
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-600.0
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50.0
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622.47
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3.0
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4.0
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-601.0
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LDV00509
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-800.0
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50.0
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829.73
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3.0
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3.8
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-801.0
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Fused Silica Double-Concave Lens
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Specifications:
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|
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Material
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UV grade fused silica
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Design Wavelength
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546.1nm
|
|
Design Index
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1.46008±0.00005
|
|
Diameter Tolerance
|
+0.00/-0.15mm
|
|
Paraxial Focus Length
|
±2% @546.1nm
|
|
Centration
|
<3 arc minutes
|
|
Clear Aperture
|
>Central 85% of diameter
|
|
Surface Figure
|
λ/4@632.8nm
|
|
Surface Quality
|
60-40 S/D
|
|
Protective Bevel
|
<0.25mm x 45°
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Fused Silica Double-Concave Lens Standard Products:
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Part No.
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f (mm)
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φ(mm)
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R1=R2(mm)
|
tc (mm)
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te (mm)
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fb (mm)
|
|
LDV01201
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-15.0
|
12.7
|
14.110
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2.0
|
5.0
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-15.7
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|
LDV01202
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-20.0
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12.7
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18.710
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2.0
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4.2
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-20.7
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LDV01203
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-25.0
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12.7
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23.320
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2.0
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3.7
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-25.7
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LDV01204
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-30.0
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12.7
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27.920
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2.0
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3.5
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-30.7
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LDV01205
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-40.0
|
12.7
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37.12
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2.0
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3.1
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-40.7
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LDV01301
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-25.0
|
25.4
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23.320
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2.0
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9.5
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-25.7
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LDV01303
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-50.0
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25.4
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46.32
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2.0
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5.6
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-50.7
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LDV01305
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-100.0
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25.4
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92.33
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2.0
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3.8
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-100.7
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LDV01307
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-200.0
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25.4
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184.35
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2.0
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2.9
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-200.7
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LDV01309
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-300.0
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25.4
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276.36
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2.0
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2.6
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-300.7
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LDV01310
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-500.0
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25.4
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460.40
|
2.0
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2.4
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-500.7
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LDV01311
|
-1000.0
|
25.4
|
920.48
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2.0
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2.2
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-1000.7
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LDV01401
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-50.0
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38.0
|
46.48
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3.0
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11.1
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-51.0
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LDV01402
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-100.0
|
38.0
|
92.49
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3.0
|
6.9
|
-101.0
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LDV01403
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-150.0
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38.0
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138.50
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3.0
|
5.6
|
-151.0
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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.
YP is an OEM manufacturer, and we don have much standard products in stock. So please contact us for your custom optics. We will do strictly according to your requirements.
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.