LC5893 25.4 mm Dia. CaF2 Plano-Concave Lens; EFL=-500mm Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -500 mm
- R1
- -216.9 mm
Material
- Name
- CaF2
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.4338389315589535
- λ
- 588 nm
- B1
- 0.5675888
- C1
- 0.00252643 μm2
- B2
- 0.4710914
- C2
- 0.010078333 μm2
- B3
- 3.8484723
- C3
- 1200.555973 μm2
LC5893 25.4 mm Dia. CaF2 Plano-Concave Lens; EFL=-500mm Uncoated
The LC5893 is a Plano-Concave Spherical Lens, part of Thorlabs' extensive catalog of optical elements. This lens boasts a diameter of 25.4 mm and a center thickness of 4 mm, making it a robust and compact solution for various optical applications.
The lens's primary feature is its effective focal length (EFL) of -500mm, which is a measure of the lens's ability to focus light. A negative EFL, as in this case, indicates a diverging lens, which spreads out light rays. This property is particularly useful in applications where beam expansion is required.
The lens is made of Calcium Fluoride (CaF2), a material with a high refractive index and low dispersion, making it ideal for broadband, achromatic applications. The lens's geometry, with an inner radius of 0 mm and an outer radius of 0 mm, further enhances its optical performance.
The LC5893 is uncoated, meaning it does not have any additional layers to enhance its optical properties. While this may result in a lower transmission rate compared to coated lenses, it ensures a broader wavelength compatibility, making it suitable for a wide range of applications.