49-777-INK 12.7 mm Dia. N-BAK1/N-SF15 Achromatic Doublet; EFL=50.8mm VIS 0° 425-675nm
- Type
- Lens
- Subtype
- Multiplets
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- 50.8 mm
- R1
- 33.17 mm
- R2
- -23.98 mm
Material 1
- Name
- N-BAK1
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5746241031015316
- λ
- 550 nm
- B1
- 1.12365662
- C1
- 0.00644742752 μm2
- B2
- 0.309276848
- C2
- 0.0222284402 μm2
- B3
- 0.881511957
- C3
- 107.297751 μm2
Material 2
- Name
- N-SF15
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.7038049870312608
- λ
- 550 nm
- B1
- 1.57055634
- C1
- 0.0116507014 μm2
- B2
- 0.218987094
- C2
- 0.0597856897 μm2
- B3
- 1.50824017
- C3
- 132.709339 μm2
49-777-INK 12.7 mm Dia. N-BAK1/N-SF15 Achromatic Doublet; EFL=50.8mm VIS 0° 425-675nm
The 49-777-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 12.7 mm and a focal length of 50.8 mm, is designed for use within the visible light spectrum, specifically between 425-675 nm.
The lens is constructed from two types of glass, N-BAK1 and N-SF15, both from Schott. These materials are carefully selected to minimize chromatic aberration, a common issue in lens systems where different wavelengths of light are focused at different points. The achromatic design ensures that the lens focuses both red and blue light to the same point, delivering sharper images.
The lens features a standard curvature coating on both the front and back surfaces, denoted as 'edm vis-0 std curve'. This coating is designed to enhance the lens's performance within the visible light spectrum, further improving image quality.
The geometry of the lens includes a thickness of 3.16 mm at the edge, 2.5 mm at the center, and 1.5 mm at the center a. The inner and outer radii are 0, suggesting a simple, circular design. The lens's EFL (Effective Focal Length) is 50.8 mm, a common choice for many optical applications.
