49-286 50 mm Dia. N-BAK4/N-SF10 Achromatic Doublet; EFL=200mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 50 mm
- EFL
- 200 mm
- R1
- 130.48 mm
- R2
- -99.36 mm
Material 1
- Name
- N-BAK4
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5709961571059783
- λ
- 550 nm
- B1
- 1.28834642
- C1
- 0.00779980626 μm2
- B2
- 0.132817724
- C2
- 0.0315631177 μm2
- B3
- 0.945395373
- C3
- 105.965875 μm2
Material 2
- Name
- N-SF10
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.7336618876174243
- λ
- 550 nm
- B1
- 1.62153902
- C1
- 0.0122241457 μm2
- B2
- 0.256287842
- C2
- 0.0595736775 μm2
- B3
- 1.64447552
- C3
- 147.468793 μm2
49-286 50 mm Dia. N-BAK4/N-SF10 Achromatic Doublet; EFL=200mm VIS 0° 425-675nm
The 49-286 is a high-quality achromatic doublet lens, boasting a 50 mm diameter and an effective focal length of 200 mm, specifically designed for the visible light spectrum ranging from 425 to 675 nm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for purchase through their official website.
The lens is meticulously crafted from two distinct materials, N-BAK4 and N-SF10, both from the Schott glass catalog. This strategic combination effectively minimizes chromatic aberration, a common issue in optical systems, thereby enhancing the overall image quality. The lens features a standard antireflection coating, denoted as "edm vis-0 std curve" on both the front and back surfaces, further optimizing its light transmission capabilities.
The lens geometry is intricately designed, with a central thickness of 9 mm, an edge thickness of 9.11 mm, and a center a thickness of 3.5 mm. The radii of curvature are R1 = 130.48 mm, R2 = -99.36 mm, and R3 = -320.2 mm. The lens does not have an inner or outer radius, indicating a uniform thickness across its diameter.
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