LE7276-F 12.7 mm Dia. ZnSe Positive Meniscus Lens; EFL=20mm 8-12µm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- 20 mm
- BFL
- 15.3 mm
- R1
- 7.5 mm
- R2
- 7.8 mm
Material
- Name
- ZnSe
- Dispersion Equation
- Sellmeier
- n (λ)
- 2.402780893783937
- λ
- 10600 nm
- B1
- 4.45813734
- C1
- 0.040344681 μm2
- B2
- 0.467216334
- C2
- 0.15317139 μm2
- B3
- 2.8956629
- C3
- 2221.822369 μm2
LE7276-F 12.7 mm Dia. ZnSe Positive Meniscus Lens; EFL=20mm 8-12µm
The LE7276-F is a spherical lens with a convex-concave base shape and a circular design, sourced from the reputable vendor Thorlabs. This lens boasts a 12.7 mm diameter and a positive meniscus, making it an ideal choice for various optical applications.
The lens has a thickness of 2.7 mm at the edge and 3 mm at the center, ensuring durability and robustness. It features an effective focal length (EFL) of 20 mm, which is crucial for determining the lens's magnification power. The first radius of curvature (R1) is 7.5 mm, while the second radius (R2) is 7.8 mm, indicating the lens's precise curvature.
The lens is crafted from ZnSe (Zinc Selenide) material, identified as "znse connolly" in the material ID. This material is known for its excellent optical properties, particularly its high transparency in the infrared region, making it suitable for applications involving wavelengths of 10600 nm.
The LE7276-F comes with anti-reflection coatings on both the front and back surfaces. These coatings, specifically the "tho znse-arced 8-12" coating, are designed to minimize reflection and increase transmission, thereby enhancing the lens's performance in its intended application.