G063058525 22.4 mm Dia. N-BK7 Mounted Double-Concave Lens; EFL=-20mm 725-1050nm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Qioptiq Photonics
Properties
- Shape
- Circular
- Diameter
- 22.4 mm
- EFL
- -20 mm
- R1
- -20.83 mm
- R2
- 20.83 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167817367777034
- λ
- 588 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
G063058525 22.4 mm Dia. N-BK7 Mounted Double-Concave Lens; EFL=-20mm 725-1050nm
This is a G063058525 model double-concave lens, featuring a 22.4 mm diameter and a center thickness of 1.5 mm. 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's effective focal length (EFL) is -20mm, making it a powerful tool for imaging applications where a reduced focal length is desired.
The lens is designed to operate within the wavelength range of 725-1050nm, which covers a significant portion of the near-infrared spectrum. This makes it suitable for various applications, including biomedical imaging, spectroscopy, and optical telecommunications.
The lens's surfaces are coated with Qio Bbar Arb2nirnbk7, a broadband anti-reflection coating that reduces surface reflections and increases transmission. This coating is applied to both the front and back surfaces of the lens, ensuring optimal performance across the entire operational wavelength range.
The lens's geometry is spherical, with both radii of curvature being equal but opposite, leading to the double-concave design. This design provides a collimated beam with a reduced diameter, making it ideal for use in beam expanders, laser resonators, and other optical systems where beam shaping is required.