LM11-25-500 25.4 mm Dia. N-BK7 Negative Meniscus Lens; EFL=-500mm Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Convex)
- Brand
- CeNing Optics
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -500 mm
- BFL
- -496.5 mm
- R1
- 235 mm
- R2
- 122.6 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.518720636186463
- λ
- 546.1 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
LM11-25-500 25.4 mm Dia. N-BK7 Negative Meniscus Lens; EFL=-500mm Uncoated
This is the LM11-25-500, a 25.4 mm diameter Negative Meniscus Lens from CeNing Optics. The lens is made of N-BK7, a popular optical glass from Schott, known for its excellent optical properties and wide transparency range.
The lens features a base shape of a circle, with a thickness of 3.3 mm at the edge and 3 mm at the center. It has a negative focal length (EFL) of -500mm, making it suitable for applications that require light convergence. The lens's first radius of curvature (R1) is 235mm, while the second radius (R2) is 122.6mm, indicating a meniscus shape.
The back focal length (BFL) of this lens is -496.5mm. The lens does not have any coating, as indicated in the item data. However, it's important to note that coatings can be applied to enhance the lens's performance, such as improving its transmission, reducing reflection, or increasing its durability.
This lens is designed to work with a wavelength of 546.1nm. It's geometry is spherical, a common shape for optical lenses due to its ease of manufacturing and good optical performance.