39-515 25.4mm Dia. ZnSe Aspheric Lens; EFL=20mm; NA=0.64 BBAR 8-12µm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 17.92 mm
- BFL
- 17.92 mm
- R1
- 28.06 mm
- R2
Material
- Name
- ZnSe
- Dispersion Equation
- Modified Sellmeier
- n (λ)
- 2.4293852609245956
- λ
- 10600 nm
- A
- 4
- B1
- 1.9
- C1
- 0.113 μm2
- B2
- 0
- C2
- 0 μm2
- B3
- 0
- C3
- 0 μm2
39-515 25.4mm Dia. ZnSe Aspheric Lens; EFL=20mm; NA=0.64 BBAR 8-12µm
This is a high-quality 39-515 25.4mm Dia. ZnSe Aspheric Lens, designed with an effective focal length (EFL) of 20mm and a numerical aperture (NA) of 0.64. The lens is made of ZnSe material, specifically marple-1964, and features a broadband anti-reflection (BBAR) coating suitable for the 8-12µm wavelength range.
The lens has a circular base shape with a diameter of 25.4mm and a thickness of 2.23mm at the edge. The EFL is 17.92mm, and the first radius of curvature (r1) is 28.06mm, while the second radius (r2) is 0mm. The lens's back focal length (BFL) is the same as its EFL, at 17.92mm. The center thickness is 5mm, and the lens's conic constant (k1) is -1.005142.
The aspheric shape of the lens is designed to reduce spherical aberration and provide better optical performance compared to traditional spherical lenses. The BBAR coating on both the front and back surfaces helps minimize surface reflections, ensuring optimal transmission in the specified 8-12µm wavelength range.
This lens is available from Edmund Optics and is currently in stock, according to the provided item data. For more information, including pricing and purchasing options, consult the vendor's website using the provided weblink.
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