69-654 25mm Dia. x 75mm 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
- 75 mm
- BFL
- 75.25 mm
- R1
- 225.29 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
69-654 25mm Dia. x 75mm FL; Coated; Ge Plano-Convex Lens BBAR 3-5µm
The 69-654 is a 25mm diameter, 75mm 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 wavelength range.
The lens's geometry includes a 2.65mm edge thickness and a 3mm center thickness, with an effective focal length of 75mm. The radius of curvature for the convex surface is 225.29mm, and the back focal length is 75.25mm. The lens's base shape is circular, and its shape is spherical.
This lens is a valuable addition to any optical system that operates in the infrared spectrum, offering high transmission and excellent optical quality. It is currently in stock, according to the vendor's website, and further information can be found at the provided weblink.