69-656 25mm Dia. x 150mm 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
- 150 mm
- BFL
- 149.25 mm
- R1
- 450.58 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
69-656 25mm Dia. x 150mm FL; Coated; Ge Plano-Convex Lens BBAR 3-5µm
The 69-656 is a 25mm diameter, 150mm 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 features a front and back coating of EDM ARCEDGERMANIUM35, a broadband anti-reflection coating designed to minimize surface reflections and increase transmission in the 3-5µm wavelength range. This coating enhances the lens' performance in infrared applications, reducing losses due to reflection and improving overall system efficiency.
The lens has a spherical shape, with a radius of curvature of 450.58mm on the curved face. The center thickness of the lens is 3mm, while the edge thickness is 2.83mm. The lens has a zero inner radius and zero outer radius, indicating a plano surface on the opposite side of the curved face.
This lens is a valuable addition to any optical system operating in the infrared spectrum, offering high transmission, low reflection, and a long focal length in a compact package. It is currently in stock, according to the vendor's website.