65-437 15 mm Dia. N-LAK14/N-SF66 Achromatic Doublet; EFL=20mm NIR II 750-1550nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 15 mm
- EFL
- 20 mm
- R1
- 11.69 mm
- R2
- -12.94 mm
Material 1
- Name
- N-LAK14
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6994860724588354
- λ
- 550 nm
- B1
- 1.50781212
- C1
- 0.00746098727 μm2
- B2
- 0.318866829
- C2
- 0.0242024834 μm2
- B3
- 1.14287213
- C3
- 80.9565165 μm2
Material 2
- Name
- N-SF66
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.9321208113933757
- λ
- 550 nm
- B1
- 2.0245976
- C1
- 0.0147053225 μm2
- B2
- 0.470187196
- C2
- 0.0692998276 μm2
- B3
- 2.59970433
- C3
- 161.817601 μm2
65-437 15 mm Dia. N-LAK14/N-SF66 Achromatic Doublet; EFL=20mm NIR II 750-1550nm
The 65-437 is a high-quality Achromatic Doublet Lens, boasting a 15 mm diameter and effective focal length of 20 mm, specifically designed for use within the Near-Infrared II spectrum (750-1550 nm). This lens is sourced from the reputable optical vendor, Edmund Optics, and is currently in stock, as indicated by its weblink status.
This lens is a multiplet, meaning it is composed of multiple optical components, in this case, two different materials - N-LAK14 and N-SF66, both from Schott. The geometry of the lens is intricately designed with specific radii and thicknesses to optimize its performance. The edge thickness is 6.1 mm, while the center thickness is 7 mm with an additional 2 mm near the aperture. The inner and outer radii are both 0, suggesting a symmetrical design.
The lens features a standard coating on both the front and back surfaces, specifically the 'edm nir-ii std curve' coating, which is tailored to enhance its performance within the Near-Infrared II spectrum. This coating ensures optimal light transmission and reduces unwanted reflections, making it an ideal choice for applications that require high-resolution imaging within this spectral range.
