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89-257 20mm Dia. x 20mm FL; YAG-BBAR Coated; Double-Convex Lens YAG-BBAR 500-1100nm

89-257 20mm Dia. x 20mm FL; YAG-BBAR Coated; Double-Convex Lens YAG-BBAR 500-1100nm

Type
Lens
Subtype
Spherical Lens (Convex-Convex)
Brand
Edmund Optics
Product webpage
Edmund Optics products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
20 mm
EFL
20 mm
BFL
18.55 mm
R1
30.25 mm
R2
-30.25 mm

Material

Name
N-SF11
Dispersion Equation
Sellmeier
n (λ)
1.7847141030246312
λ
587.6 nm
B1
1.73759695
C1
0.013188707 μm2
B2
0.313747346
C2
0.0623068142 μm2
B3
1.89878101
C3
155.23629 μm2

89-257 20mm Dia. x 20mm FL; YAG-BBAR Coated; Double-Convex Lens YAG-BBAR 500-1100nm

The 89-257 is a high-quality double-convex lens, designed and manufactured by Edmund Optics. This lens boasts a 20mm diameter and a focal length of 20mm, making it a versatile choice for a variety of optical applications.

The lens is constructed from n-sf11 Schott, a high-index glass with excellent optical properties. The double-convex geometry, with radii of curvature of 30.25mm on both sides, ensures efficient light gathering and focusing. The lens has a central thickness of 5mm and an edge thickness of 1.6mm, providing robustness and durability.

The lens features a YAG-BBAR coating on both the front and back surfaces. This coating, designed for the 500-1100nm wavelength range, enhances the lens's performance by reducing reflection and increasing transmission. The coating ensures high-fidelity light transmission, making the lens ideal for use in laser systems, imaging applications, and other settings where high-quality optical performance is required.

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