Bi-Concave-Model.jpg

Bi-Concave Lens

Bi-concave lenses have two inward curved surfaces. These lenses have a negative focal length. Our catalog bi-concave lenses have an identical curvature on both sides of the lens and are therefore symmetric. At unit conjugation, coma and distortion are cancelled out due to the symmetry. They are used to diverge incoming light or increase the focal length of an existing optical system.

Diameter Dia. Tolerance CT Tolerance Centering Irregularity Surface Quality Bevel
5.00-25.00 +0.00 / -0.10 ±0.1 < 3 minutes 0.5 Waves 40-20 0.25 x 45°
25.01 - 50.00 +0.00 / -0.10 ±0.1 < 3 minutes 0.5 Waves 60-40 0.50 x 45°
50.01-100.00 +0.00 / -0.10 ±0.1 < 3 minutes 0.5 Waves 60-40 0.50 x 45°
Dimensions MM
Clear Aperture CA >= 90% of Diameter
Flat Annulus Dia < 50 mm - Flat = 0.25 +0/-0.20
Dia > 50 mm - Flat = 0.50 +0/-0.40
Coating Uncoated, Specify your coating (See Coating Chart for Available Options)
Design Wavelength 587.6nm
Focal Length Tolerance ±2%
Edge Thickness Reference
* All dimensions are in mm
Viewing 61 to 90 (91 Total)
Sort by:
Part Number
Diameter
Effective Focal Length
Back Focal Length
Center Thickness
Edge Thickness
L-BCC087
38.1000
-100.0000
-100.6000
2.50
5.3500
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L-BCC088
38.1000
-150.0000
-150.8000
2.50
4.3900
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L-BCC089
38.1000
-200.0000
-200.8000
2.50
3.9200
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L-BCC090
38.1000
-250.0000
-250.6000
2.50
3.6300
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L-BCC091
38.1000
-500.0000
-500.9000
2.50
3.0600
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L-BCC092
40.0000
-50.0000
-50.5000
1.40
9.6000
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L-BCC093
40.0000
-100.0000
-100.7000
2.20
6.0000
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L-BCC094
40.0000
-150.0000
-150.7000
2.10
4.6000
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L-BCC095
40.0000
-200.0000
-200.7000
2.20
4.1000
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L-BCC096
40.0000
-250.0000
-250.6000
1.90
3.5000
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L-BCC105
50.0000
-50.0000
-50.8000
2.50
15.3000
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L-BCC107
50.0000
-75.0000
-75.8000
2.50
10.7000
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L-BCC108
50.0000
-100.0000
-101.0000
2.00
7.9000
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L-BCC109
50.0000
-125.0000
-125.8000
2.50
7.3000
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L-BCC110
50.0000
-150.0000
-151.2000
2.00
5.9000
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L-BCC111
50.0000
-200.0000
-201.4000
2.00
4.9000
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L-BCC112
50.0000
-250.0000
-250.8000
2.50
4.9000
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L-BCC113
50.0000
-300.0000
-300.8000
2.50
4.5000
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L-BCC114
50.0000
-400.0000
-400.8000
2.50
4.1000
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L-BCC115
50.0000
-500.0000
-500.8000
2.50
3.7000
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L-BCC116
50.0000
-600.0000
-603.0000
2.00
3.0000
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L-BCC117
50.0000
-750.0000
-750.8000
2.50
3.3000
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L-BCC118
50.0000
-1000.0000
-1000.8000
2.50
3.1000
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L-BCC119
50.8000
-100.0000
-100.6000
2.50
7.5900
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L-BCC120
50.8000
-150.0000
-150.8000
2.50
5.8800
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L-BCC121
50.8000
-200.0000
-200.8000
2.50
5.0300
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L-BCC122
50.8000
-250.0000
-250.6000
2.50
4.5200
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L-BCC123
50.8000
-500.0000
-501.0000
2.50
3.5100
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L-BCC124
63.5000
-300.0000
-300.6000
2.00
5.3000
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L-BCC125
76.2000
-150.0000
-150.8000
2.50
10.1500
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