69-651 25mm Dia. x 35mm FL; Coated; Ge Plano-Convex Lens BBAR 3-5µm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 35 mm
- BFL
- 34.25 mm
- R1
- 105.14 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
69-651 25mm Dia. x 35mm FL; Coated; Ge Plano-Convex Lens BBAR 3-5µm
The 69-651 is a 25mm diameter, 35mm focal length plano-convex lens, manufactured by Edmund Optics. This lens is made of Germanium burnett, a material well-suited for infrared applications due to its high refractive index and transparency in the infrared spectrum. The lens has a front and back coating of EDM ARCEDGERMANIUM35, a broadband anti-reflection coating that reduces surface reflections and increases transmission in the 3-5µm range.
The lens has a planar surface on one side and a convex surface on the other, with a 105.14mm radius of curvature. The center thickness is 3mm, while the edge thickness is 2.25mm. The back focal length is 34.25mm, and the effective focal length is 35mm. The lens is designed for use in the infrared region, specifically at a wavelength of 10600nm.
This lens is a great choice for applications that require a high-quality, infrared-transparent lens with a long focal length. Its broadband anti-reflection coating makes it suitable for use in systems where minimizing surface reflections is crucial. The lens is currently in stock and available for purchase through the Edmund Optics website.
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