69-639 25mm Dia. x 35mm FL; Uncoated; Ge Plano-Convex Lens
- 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
69-639 25mm Dia. x 35mm FL; Uncoated; Ge Plano-Convex Lens
The 69-639 is a 25mm diameter, 35mm focal length plano-convex lens, sourced from Edmund Optics. This lens is made of germanium burnett, a material with a wavelength of 10600. The lens's geometry includes a 2.25mm thickness at the edge, increasing to 3mm at the center, with a 34.25mm back focal length. The lens's inner and outer radii are both zero, and its effective focal length is 35mm.
The lens's shape is spherical, and it is uncoated. Despite being uncoated, this lens is still a high-quality optical component, suitable for a wide range of applications. However, users should be aware that uncoated lenses may be more susceptible to environmental factors such as dust and moisture, and may not perform as well in high-intensity light situations as coated lenses.
This lens is currently in stock and available for purchase through the Edmund Optics website. With its robust specifications and high-quality construction, the 69-639 is an excellent choice for users in need of a reliable, versatile plano-convex lens.
