SLB-20-70PM 20.0 mm Dia. x 70.0 mm FL; Coated; Plano-Convex Lens 400-700nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 20 mm
- EFL
- 70 mm
- BFL
- 67.8 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-20-70PM 20.0 mm Dia. x 70.0 mm FL; Coated; Plano-Convex Lens 400-700nm
The SLB-20-70PM is a Plano-Convex lens, a type of spherical lens, sourced from OptoSigma. This lens has a diameter of 20.0 mm and a focal length of 70.0 mm, making it suitable for a wide range of optical applications. The lens is made from n-bk7 schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence.
The lens features a Plano-Convex geometry, meaning one side is flat (Plano) and the other side is curved (Convex). The curvature of the convex side is defined by a radius of 36.33 mm. The lens has an edge thickness of 2.0 mm and a center thickness of 3.4 mm, providing structural integrity and minimizing optical distortion.
The SLB-20-70PM is coated with an Opt M coating on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and increasing transmission within the 400-700nm wavelength range. The coating also provides protection against environmental factors, ensuring the lens maintains its optical properties over time.
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