SLB-40-70NM 40.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 400-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- -70 mm
- BFL
- -71.3 mm
- R1
- -36.33 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-40-70NM 40.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 400-700nm
This is a Plano-Concave Lens, type SLB-40-70NM, sourced from OptoSigma. The lens has a diameter of 40.0 mm and a focal length of -70.0 mm, making it suitable for applications that require a negative focal length. The lens is made of n-bk7 schott material, a popular choice for its high refractive index and low dispersion.
The lens's geometry includes an edge thickness of 8.0 mm and a center thickness of 2.0 mm. The inner and outer radii are both 0.0 mm, indicating a flat surface on one side and a concave surface on the other. The lens's back focal length is -71.3 mm, slightly longer than its focal length due to the curvature of the concave surface.
The lens is coated with an Opt M coating on both the front and back surfaces. This coating enhances the lens's performance in the 400-700nm wavelength range, making it ideal for applications such as laser systems, machine vision, and optical metrology.
The lens is currently in stock and available for immediate purchase. For more information, please refer to the vendor's website or contact 3DOptix directly.