49-695 25mm Dia. UVFS Aspheric Lens; EFL=25mm; NA=0.5 UV 250-425nm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 25 mm
- BFL
- 18.32 mm
- R1
- 11.46 mm
- R2
Material
- Name
- HPFS7980
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.4584656081538023
- λ
- 587.6 nm
- B1
- 0.683740494
- C1
- 0.00460352869 μm2
- B2
- 0.420323613
- C2
- 0.0133968856 μm2
- B3
- 0.58502748
- C3
- 64.4932732 μm2
49-695 25mm Dia. UVFS Aspheric Lens; EFL=25mm; NA=0.5 UV 250-425nm
This is a 25mm diameter aspheric lens, catalog number 49-695, offered by Edmund Optics. The lens is made of UV fused silica, specifically Corning's HPFS7980 material, and features a UV coating suitable for the 250-425nm wavelength range. The lens is designed with a high numerical aperture (NA) of 0.5, indicating its ability to gather and focus light efficiently.
The lens's geometry includes an inner radius of 0mm, an outer radius of 0mm, a thickness at the edge of 1.75mm, and a thickness at the center of 9.75mm. The effective focal length (EFL) is 25mm, and the back focal length (BFL) is 18.32mm. The lens's aspheric design is defined by a conic constant (k1) of -1.661222, with higher-order aspheric terms equal to 0.
The lens's front and back surfaces are coated with an EDM UV coating, optimized for the 250-425nm wavelength range. This coating enhances the lens's performance in UV applications by reducing surface reflections and improving transmission.
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