G313205331 22.4 mm Dia. N-BK7 Double-Concave Lens; EFL=-20mm
- 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
G313205331 22.4 mm Dia. N-BK7 Double-Concave Lens; EFL=-20mm
This is a G313205331 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 glass type in the optical industry known for its excellent optical properties, such as low auto-fluorescence and a high Abbe number. The effective focal length (EFL) of this lens is -20mm, making it a concave lens that diverges light.
The lens has two radii of curvature: r1 is -20.833mm, and r2 is 20.833mm. These radii determine the lens's shape and contribute to its focusing power. The lens's inner and outer radii are both 0, indicating that the lens has a uniform thickness.
The lens is coated with Qio AR Al RALVIS AOI 45 on both the front and back surfaces. This anti-reflection coating reduces unwanted reflections and increases transmission, making the lens more efficient in light transmission. The coating angle is 45 degrees, which is a common angle used in optical systems.
This lens is sourced from Qioptiq Photonics, a renowned vendor in the optical industry. According to the vendor's information, the lens is in stock and available for immediate purchase. The provided weblink leads to the product page on Qioptiq's official website, where more detailed information and specifications can be found.
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