SLB-25B-70NIR2 25.0 mm Dia. x -69.7 mm FL; Coated; Double-Concave Lens 750-1550nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- -69.7 mm
- BFL
- -70.3 mm
- R1
- -72.66 mm
- R2
- 72.66 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-25B-70NIR2 25.0 mm Dia. x -69.7 mm FL; Coated; Double-Concave Lens 750-1550nm
The SLB-25B-70NIR2 is a high-quality double-concave lens, designed and manufactured by OptoSigma. This lens, with a diameter of 25.0 mm and a focal length of -69.7 mm, is made from the renowned material n-BK7 Schott, ensuring durability and reliability.
The lens geometry is characterized by its base shape, which is circular, and its edge thickness of 4.2 mm. The center thickness is 2 mm, and the back focal length is -70.3 mm. The inner and outer radii are both 0, indicating a symmetrical design.
This lens is designed to operate within the wavelength range of 546.1 nm, making it suitable for a wide range of optical applications. The lens features a coating of opt IR2 on both the front and back surfaces, enhancing its performance in the infrared spectrum, specifically between 750-1550 nm.
The lens's spherical shape allows for excellent light transmission and focus, making it an ideal choice for various optical systems. The double-concave design further enhances its focusing capabilities, making it a versatile and valuable addition to any optical setup.
