Bi-Convex Lens, Fused Silica, 25.4 mm Diameter, 20.0 mm EFL, Uncoated

The SBX018 Fused Silica Bi-Convex Lens is an uncoated, 25.4 mm diameter, fused silica bi-convex lens with an effective focal length of 20.0 mm. It is designed to meet the demanding requirements of laser electro-optic applications. Newport's UV grade fused silica precision bi-convex lenses are polished to tight tolerances using master test plates to ensure minimum wavefront distortion. UV grade fused silica will not fluoresce under UV light and is resistant to radiation. And for high-energy applications, the extreme purity of fused silica eliminates microscopic defect sites that could lead to laser damage.

Specifications

Technical Specs

Lens Shape
Bi-Convex
Diameter
25.4 mm
Lens Material
UV Fused Silica
Antireflection Coating
Uncoated
Surface Quality
20-10 scratch-dig
Surface Flatness
λ/2
Surface Accuracy, Irregularity
λ/8
Surface Accuracy, Power
1.5 λ
F/#
0.8
Effective Focal Length (EFL)
20.0 mm
Back Focal Length (BFL)
13.45 mm
Radius of Curvature (R)
15.388 mm
Edge Thickness (Te)
2.60 mm
Center Thickness (Tc)
16.000 mm

Principal Plane 1 (P1)
6.55 mm
Principal Plane 2 (P2)
-6.55 mm
Design Wavelength
589 nm
Centration
≤3 arc min
Chamfers
0–0.8 mm face width
Chamfers Angle/Tolerance
45° ±15°, typical
Focal Length Tolerance
±1 %
Diameter Tolerance
+0/-0.1 mm
Center Thickness Tolerance
±0.1 mm
Clear Aperture
≥central 90% of diameter
Cleaning
See How to Clean Optics

Lens Shape
Bi-Convex
Diameter
25.4 mm
Lens Material
UV Fused Silica
Antireflection Coating
Uncoated
Surface Quality
20-10 scratch-dig
Surface Flatness
λ/2
Surface Accuracy, Irregularity
λ/8
Surface Accuracy, Power
1.5 λ
F/#
0.8
Effective Focal Length (EFL)
20.0 mm
Back Focal Length (BFL)
13.45 mm
Radius of Curvature (R)
15.388 mm
Edge Thickness (Te)
2.60 mm
Center Thickness (Tc)
16.000 mm

Principal Plane 1 (P1)
6.55 mm
Principal Plane 2 (P2)
-6.55 mm
Design Wavelength
589 nm
Centration
≤3 arc min
Chamfers
0–0.8 mm face width
Chamfers Angle/Tolerance
45° ±15°, typical
Focal Length Tolerance
±1 %
Diameter Tolerance
+0/-0.1 mm
Center Thickness Tolerance
±0.1 mm
Clear Aperture
≥central 90% of diameter
Cleaning
See How to Clean Optics

Resources & Downloads

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