87-956 25 mm Dia. Germanium Positive Meniscus Lens; EFL=30mm Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Concave)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 30 mm
- BFL
- 28.31 mm
- R1
- 33.38 mm
- R2
- 50.04 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
87-956 25 mm Dia. Germanium Positive Meniscus Lens; EFL=30mm Uncoated
This is a 25 mm diameter Germanium positive meniscus lens, sourced from the reputable vendor Edmund Optics. The lens has an effective focal length (EFL) of 30mm, making it suitable for a variety of optical applications. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties or protect it from environmental factors.
The lens geometry is characterized by a thickness of 1.5mm at the edge and 2.5mm at the center. The radii of curvature for the first and second surfaces are 33.38mm and 50.04mm respectively, contributing to its meniscus shape. The back focal length (BFL) of the lens is 28.31mm. The lens does not have any inner or outer radius, indicating a uniform thickness across its diameter.
The lens is made of germanium, a material with a high refractive index and excellent transmission properties in the infrared region, specifically at a wavelength of 10600nm. This makes the lens ideal for infrared (IR) optical systems.
Please note that the lens is currently in stock and the provided weblink leads to its product page on the Edmund Optics website, where you can find more information and purchase options.
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