49-774 12.7 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=31.75mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- 31.75 mm
- R1
- 21.13 mm
- R2
- -16.69 mm
Material 1
- Name
- N-SSK8
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.6203679865890697
- λ
- 550 nm
- B1
- 1.44857867
- C1
- 0.00869310149 μm2
- B2
- 0.117965926
- C2
- 0.0421566593 μm2
- B3
- 1.06937528
- C3
- 111.300666 μm2
Material 2
- Name
- N-SF56
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.791037231451858
- λ
- 550 nm
- B1
- 1.73562085
- C1
- 0.0129624742 μm2
- B2
- 0.317487012
- C2
- 0.0612884288 μm2
- B3
- 1.95398203
- C3
- 161.559441 μm2
49-774 12.7 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=31.75mm VIS 0° 425-675nm
The 49-774 is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens is designed with a 12.7 mm diameter and features an effective focal length (EFL) of 31.75mm, making it suitable for a wide range of optical applications.
The lens is constructed from two types of Schott glass, N-SSK8 and N-SF56, which are renowned for their excellent optical properties. The use of these materials in a doublet configuration helps to minimize chromatic aberration, ensuring sharp and clear images across the visible spectrum, specifically within the 425-675nm range.
The lens geometry is carefully crafted, with a central thickness of 4mm and edge thickness of 4.45mm. The first and second radii are R1=21.13mm and R2=-16.69mm, respectively, while the third radius, R3, is -61.73mm. These parameters contribute to the lens's overall performance and optical quality.
The lens surfaces are coated with Edmund Optics' standard Vis-0 coating, which is applied to both the front and back surfaces. This coating is designed to enhance the lens's transmission within the visible spectrum, further optimizing its performance for various applications.
