69-661 25mm Dia. x 25mm FL; Coated; Ge Plano-Convex Lens BBAR 8-12µm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 25 mm
- BFL
- 24.25 mm
- R1
- 75.1 mm
Material
- Name
- Germanium
- Dispersion Equation
- Sellmeier
- n (λ)
- 4.00355628065046
- λ
- 10600 nm
- B1
- 0.4886331
- C1
- 1.393959 μm2
- B2
- 14.5142535
- C2
- 0.1626427 μm2
- B3
- 0.0091224
- C3
- 752.19 μm2
69-661 25mm Dia. x 25mm FL; Coated; Ge Plano-Convex Lens BBAR 8-12µm
The 69-661 is a 25mm diameter, 25mm focal length plano-convex lens, designed for use in the 8-12µm wavelength range. This lens is sourced from Edmund Optics, a leading vendor in the optical industry, and is available for immediate purchase.
The lens is made from Germanium burnett, a material known for its excellent optical properties in the infrared spectrum. It features a front and back coating of EDM ARCEDGERMANIUM81, a broadband anti-reflection coating that enhances transmission and reduces surface reflections.
The lens has a planar surface on one side and a convex surface on the other, with a radius of curvature of 75.1mm. The center thickness is 3mm, while the edge thickness is 1.95mm. The effective focal length (EFL) is 25mm, and the back focal length (BFL) is 24.25mm. The lens has no inner or outer radius, indicating a uniform thickness across the diameter.
This lens is suitable for a wide range of applications, including infrared imaging, spectroscopy, and beam shaping. Its high transmission, low reflectivity, and precise optical properties make it an ideal choice for these and many other applications in the 8-12µm wavelength range.