581FDL25 25 mm Dia. Longpass Dichroic Filter 581nm
- Type
- Filter
- Subtype
- Dichroic Filter
- Brand
- Knight Optical
Properties
- Shape
- Circular
- Diameter
- 25 mm
- Cut Off Frequency
- Cut On Frequency
- 581 nm
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
581FDL25 25 mm Dia. Longpass Dichroic Filter 581nm by Knight Optical
The 581FDL25 is a high-quality Dichroic Filter, specifically a Longpass Filter with a 581nm cut-on wavelength, manufactured by Knight Optical. This filter is designed with a circular geometry, featuring a 25mm diameter and a thickness of 1.1mm, making it suitable for a wide range of optical applications.
The filter is made from N-BK7 Schott, a popular optical glass due to its excellent optical properties and high chemical resistance. The filter's coating, KNI 581FDL-0, is applied to both the front and back surfaces, enhancing its performance and durability.
The 581FDL25 filter is designed to transmit light at wavelengths above 581nm while reflecting or absorbing wavelengths below this value. This makes it ideal for applications where the removal of shorter wavelengths is required. The physical data indicates a cut-on wavelength of 581nm, ensuring precise filtering of the desired light spectrum.
Knight Optical, the vendor, is a reputable supplier of optical components, ensuring the filter's quality and reliability. The filter is currently in stock and available for immediate purchase through the provided web link.