89-617 25mm Dia. Silicon Aspheric Lens; EFL=25mm; NA=0.5 BBAR 3-5µm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 25 mm
- BFL
- 22.5 mm
- R1
- 26.92 mm
- R2
- 43.58 mm
Material
- Name
- Silicon
- Dispersion Equation
- Sellmeier
- n (λ)
- 3.4253004915192267
- λ
- 4000 nm
- B1
- 10.6684293
- C1
- 0.090912191 μm2
- B2
- 0.003043475
- C2
- 1.287660172 μm2
- B3
- 1.54133408
- C3
- 1218816 μm2
89-617 25mm Dia. Silicon Aspheric Lens; EFL=25mm; NA=0.5 BBAR 3-5µm
The 89-617 is a 25mm diameter aspheric lens, designed and manufactured by Edmund Optics. This lens boasts an effective focal length (EFL) of 25mm and a numerical aperture (NA) of 0.5, making it a versatile choice for various optical applications.
The lens is made of silicon, specifically silicon sal vil 1957, a material known for its excellent optical properties. The silicon material, combined with the aspheric design, helps to minimize spherical aberration, coma, and other optical aberrations, thereby delivering high-quality images.
The lens features a broadband anti-reflection (BBAR) coating on both the front and back surfaces. This coating is designed to reduce reflection across a wide spectral range, from 3µm to 5µm, thereby enhancing transmission and improving overall system performance.
The geometry of the lens includes an inner radius of 0mm, an outer radius of 0mm, a thickness at the edge of 2.44mm, and a thickness at the center of 3.8mm. The front and back surfaces of the lens have radii of curvature of 26.922mm and 43.582mm, respectively. The back focal length (BFL) of the lens is 22.5mm.
