SLB-25-30NM 25.0 mm Dia. x -30.0 mm FL; Coated; Plano-Concave Lens 400-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- -30 mm
- BFL
- -31.3 mm
- R1
- -15.57 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
SLB-25-30NM 25.0 mm Dia. x -30.0 mm FL; Coated; Plano-Concave Lens 400-700nm
The SLB-25-30NM is a Plano-Concave Spherical Lens, sourced from the reputable vendor OptoSigma. This lens boasts a diameter of 25.0 mm and a focal length of -30.0 mm, making it ideal for applications that require a negative focal length.
The lens is crafted from n-bk7 schott, a high-quality optical glass known for its excellent transmittance and low auto-fluorescence. This material is particularly suitable for applications in the visible spectrum, as indicated by its wavelength of 546.1 nm.
The SLB-25-30NM features a robust coating on both the front and back surfaces. This coating, identified as 'opt m', is designed to enhance the lens's performance by reducing reflection and increasing transmittance.
The lens's geometry is meticulously designed, with an edge thickness of 8.3 mm and a center thickness of 2 mm. The inner and outer radii are 0 mm, indicating a flat surface on both sides of the lens. The back focal length (BFL) is -31.3 mm, further emphasizing the lens's concave nature.