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Cylindrical Lens, Plano-Concave, N-BK7, 50.8x19.0mm, -50mm FL, 1000-1550nm
The CKV050AR.18 Plano-Concave Cylindrical Lens is a 1000 to 1550 nm anti-reflection coated, 2 inch (50.8 mm) length by 19.05 mm width, N-BK7 plano-concave cylindrical lens with an effective focal length of -50 mm. It is designed to meet the demanding requirements of laser electro-optic applications. Newport's N-BK7 precision cylindrical lenses are manufactured from fine annealed optical glass and are polished to tight tolerances to ensure minimum wavefront distortion. Specifications
Lens Type
Cylindrical
Lens Shape
Plano-Concave
Size
50.8 x 19.05 mm
Center Thickness (T<sub>c</sub>)
6.0 mm
Edge Thickness (T<sub>e</sub>)
7.62 mm
Lens Material
Grade A N-BK7
Antireflection Coating
1000-1550 nm
Coating Code
AR.18
Surface Quality
40-20 scratch-dig
Surface Flatness
λ/2-λ/4
Surface Accuracy, Irregularity, X Axis
≤λ/4 per cm
Surface Accuracy, Irregularity, Y Axis
≤λ/2
Effective Focal Length (EFL)
-50.0 mm
Back Focal Length (BFL)
-53.96 mm
Thickness
6.0 mm
Centration
<3 arc min
Principal Plane 2 (P<sub>2</sub>)
-3.96 mm
Radius of Curvature (R)
-25.850 mm
Size Tolerance
±0.1 mm
Focal Length Tolerance
± 2.0%
Center Thickness Tolerance
+0.5/-0.25 mm
Edge Thickness Tolerance
±0.3 mm
Wedge
<1 mrad in X axis
Clear Aperture
≥central 80% of dimensions
Chamfers
0.5 mm face width
Chamfers Angle/Tolerance
45°, typical
f/Y
-2.6
Cleaning
Lens Type
Cylindrical
Lens Shape
Plano-Concave
Size
50.8 x 19.05 mm
Center Thickness (T<sub>c</sub>)
6.0 mm
Edge Thickness (T<sub>e</sub>)
7.62 mm
Lens Material
Grade A N-BK7
Antireflection Coating
1000-1550 nm
Coating Code
AR.18
Surface Quality
40-20 scratch-dig
Surface Flatness
λ/2-λ/4
Surface Accuracy, Irregularity, X Axis
≤λ/4 per cm
Surface Accuracy, Irregularity, Y Axis
≤λ/2
Effective Focal Length (EFL)
-50.0 mm
Back Focal Length (BFL)
-53.96 mm
Thickness
6.0 mm
Centration
<3 arc min
Principal Plane 2 (P<sub>2</sub>)
-3.96 mm
Radius of Curvature (R)
-25.850 mm
Size Tolerance
±0.1 mm
Focal Length Tolerance
± 2.0%
Center Thickness Tolerance
+0.5/-0.25 mm
Edge Thickness Tolerance
±0.3 mm
Wedge
<1 mrad in X axis
Clear Aperture
≥central 80% of dimensions
Chamfers
0.5 mm face width
Chamfers Angle/Tolerance
45°, typical
f/Y
-2.6
Cleaning
