LC7759-E3 25.4 mm Dia. ZnSe Plano-Concave Lens; EFL=-25.4mm 7-12µm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -25.4 mm
- R1
- -35.6 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
LC7759-E3 25.4 mm Dia. ZnSe Plano-Concave Lens; EFL=-25.4mm 7-12µm
The LC7759-E3 is a 25.4 mm diameter Plano-Concave Spherical Lens, designed for use in the infrared spectrum with a center wavelength of 10600 nm. This lens is sourced from Thorlabs, a reputable vendor known for their high-quality optical components.
The lens is made from ZnSe (Zinc Selenide), a material with excellent optical properties in the infrared region. The lens has a plano-concave geometry, meaning one surface is flat while the other is curved inward. This particular lens has a concave radius (R1) of -35.6 mm, indicating a relatively steep curvature.
The lens has a thickness of 2 mm at its center and an effective focal length (EFL) of -25.4 mm. This negative EFL indicates that the lens is diverging, spreading out light rays that pass through it. The lens's inner and outer radii are both 0 mm, suggesting that the lens has a uniform thickness.
The lens is coated with Thorlabs' E3ZnSeARC coating on both the front and back surfaces. This anti-reflection coating is designed to reduce surface reflections and increase transmission in the 7-12 µm range, enhancing the lens's performance in the infrared spectrum.
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