420FAP2500 25 mm Dia. Acrylic Colour Longpass Filter 420nm
- Type
- Filter
- Subtype
- Longpass Filter
- Brand
- Knight Optical
Properties
- Shape
- Circular
- Diameter
- 25 mm
- Cut Off Frequency
- 2200 nm
- Cut On Frequency
- 420 nm
Material
- Name
- UVFS
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.458448271212196
- λ
- 588 nm
- B1
- 0.6961663
- C1
- 0.004679148 μm2
- B2
- 0.4079426
- C2
- 0.013512063 μm2
- B3
- 0.8974794
- C3
- 97.93400254 μm2
420FAP2500 25 mm Dia. Acrylic Colour Longpass Filter 420nm
The 420FAP2500 is a Longpass Filter with a 25 mm diameter and a 1 mm thickness, sourced from Knight Optical. This filter is designed to transmit light with wavelengths above 420 nm, while blocking light with shorter wavelengths. The cut-on wavelength is 420 nm, and the cut-off wavelength is 2200 nm, providing a significant range of transmission.
This filter is made of UVFS MAL-1965, a material known for its optical properties. The filter is coated on both sides with KNI 420FAP, a coating that enhances its performance and durability. The filter's shape is that of a Thin Lens, which is often used in optical systems to reduce spherical aberration and improve image quality.
The 420FAP2500 is currently in stock and available for purchase on Knight Optical's website. It is a versatile and reliable option for applications that require longpass filtration, such as fluorescence microscopy, spectroscopy, and optical sorting.