69-640 25mm Dia. x 40mm FL; Uncoated; Ge Plano-Convex Lens
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 40 mm
- BFL
- 39.25 mm
- R1
- 120.16 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
69-640 25mm Dia. x 40mm FL; Uncoated; Ge Plano-Convex Lens
The 69-640 is a Plano-Convex lens, a type of spherical lens, sourced from Edmund Optics. This lens has a base shape of a circle and is made of Germanium burnett material, which is specifically designed for use with a wavelength of 10600 nm. The lens has a diameter of 25 mm and a thickness at the edge of 2.35 mm, while the center thickness is 3 mm. The effective focal length (EFL) of the lens is 40 mm, and the radius of curvature (R1) is 120.16 mm.
The lens's back focal length (BFL) is 39.25 mm, and it does not have any coating applied to it. The inner and outer radii are both 0 mm. This lens is uncoated, which means it does not have any anti-reflective or other coatings applied to it. This can be beneficial in certain applications where the user does not want any additional reflections or alterations to the light path.
The lens is currently in stock and can be purchased directly from the Edmund Optics website using the provided weblink. This lens is a great option for those looking for a high-quality, uncoated Plano-Convex lens for use in their optical systems.
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