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
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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