67-335 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=750mm VIS-NIR 400-1000nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- 750 mm
- R1
- 315.2 mm
- R2
- -507.71 mm
Material 1
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5185223876207927
- λ
- 550 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
Material 2
- Name
- N-SF5
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6771143911586193
- λ
- 550 nm
- B1
- 1.52481889
- C1
- 0.011254756 μm2
- B2
- 0.187085527
- C2
- 0.0588995392 μm2
- B3
- 1.42729015
- C3
- 129.141675 μm2
67-335 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=750mm VIS-NIR 400-1000nm
The 67-335 is a high-quality achromatic doublet lens, designed and manufactured by Edmund Optics. This lens, with a 25 mm diameter, is specifically engineered for use in the visible to near-infrared spectrum, spanning from 400 to 1000 nanometers.
The lens features a focal length of 750mm, making it suitable for applications that require a long focal length. The achromatic design of the lens ensures that it effectively minimizes chromatic aberration, a common issue in lenses where different wavelengths of light are focused at different points.
The lens is composed of two elements, made from N-BK7 and N-SF5 Schott glass. These materials were chosen for their excellent optical properties, including high transmittance and low dispersion. The lens is coated with the EDM VIS-NIR 0SP2002000 coating on both the front and back surfaces, which further enhances its performance by reducing surface reflections and increasing transmission.
The geometry of the lens is carefully crafted, with a thickness at the edge of 4.75mm, an inner radius of 0, and an outer radius of 0. The thickness at the center is 2.5mm, and the thickness at the center 'a' is also 2.5mm. This precise construction ensures the lens delivers superior optical performance.
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