22-778 12.5mm Dia. Germanium Infrared Aspheric Lens; EFL=37.5mm; NA=0.16 BBAR 3-12µm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12.5 mm
- EFL
- 37.5 mm
- BFL
- 36.75 mm
- R1
- 112.75 mm
- R2
Material
- Name
- Germanium
- Dispersion Equation
- Sellmeier
- n (λ)
- 4.006232253035364
- λ
- 8000 nm
- B1
- 0.4886331
- C1
- 1.393959 μm2
- B2
- 14.5142535
- C2
- 0.1626427 μm2
- B3
- 0.0091224
- C3
- 752.19 μm2
22-778 12.5mm Dia. Germanium Infrared Aspheric Lens; EFL=37.5mm; NA=0.16 BBAR 3-12µm
This is a high-quality 12.5mm diameter germanium aspheric lens, designed for use in the infrared spectrum with a wavelength of 8000nm. The lens is sourced from the reputable vendor, Edmund Optics, and is available for purchase through their website. The catalog number for this lens is 22-778.
The lens features a focal length of 37.5mm and a numerical aperture of 0.16. It is made from 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 double-sided broadband anti-reflection coating, specifically designed for the 3-12µm range, which reduces surface reflections and increases transmission.
The lens's geometry includes an inner radius of 0mm, an outer radius of 0mm, a thickness at the edge of 2.83mm, and a thickness at the center of 3mm. The front and back surfaces of the lens are aspheric, with the front surface having a radius of curvature of 112.753mm and the back surface being planar. The lens also has a front surface sag of -0.9mm and a back surface sag of 0mm.
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