69-683 25mm Dia. x 30mm FL; Coated; Si Plano-Convex Lens BBAR 3-5µm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 30 mm
- R1
- 72.53 mm
Material
- Name
- Silicon
- Dispersion Equation
- Sellmeier
- n (λ)
- 3.4176022196178844
- λ
- 10600 nm
- B1
- 10.6684293
- C1
- 0.090912191 μm2
- B2
- 0.003043475
- C2
- 1.287660172 μm2
- B3
- 1.54133408
- C3
- 1218816 μm2
69-683 25mm Dia. x 30mm FL; Coated; Si Plano-Convex Lens BBAR 3-5µm
The 69-683 is a 25mm diameter, 30mm focal length plano-convex lens, manufactured by Edmund Optics. This lens is made from silicon, specifically silicon sal vil 1957, and features a broadband anti-reflection (BBAR) coating on both the front and back surfaces. The BBAR coating is designed to reduce surface reflections and increase transmission across the 3-5µm wavelength range.
The lens has a plano-convex geometry, meaning one side is flat (plano) and the other side is curved (convex). The radius of curvature for the convex side is 72.53mm. The lens has a central thickness of 3.5mm and an edge thickness of 2.41mm. The effective focal length (EFL) of the lens is 30mm, which is the distance over which the lens will focus parallel rays of light.
This lens is a great option for applications that require a high transmission in the mid-infrared region, such as thermal imaging, gas sensing, and spectroscopy. It is available for purchase directly from the Edmund Optics website, where you can find more detailed specifications and pricing information.