FB3250-500 Dia. 1 in IR Bandpass Filter; CWL=3.25 µm; FWHM=500nm
- Type
- Filter
- Subtype
- Bandpass Filter
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- Cut Off Frequency
- 3500 nm
- Cut On Frequency
- 3000 nm
Material
- Name
- Sapphire ow
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.7041342779755526
- λ
- 3250 nm
- B1
- 1.4313493
- C1
- 0.005279926 μm2
- B2
- 0.65054713
- C2
- 0.014238265 μm2
- B3
- 5.3414021
- C3
- 325.0178341 μm2
FB3250-500 Dia. 1 in IR Bandpass Filter; CWL=3.25 µm; FWHM=500nm
The FB3250-500 is a high-quality bandpass filter, designed and manufactured by Thorlabs. This particular model is a circular filter, made from sapphire ow mal-1972, and features a diameter of 1 inch and a thickness of 3 millimeters.
The filter is designed to pass wavelengths in the infrared (IR) region of the spectrum, specifically between 3000 and 3500 nanometers, with a central wavelength (CWL) of 3250 nanometers. The full width at half maximum (FWHM) of this filter is 500 nanometers, indicating a relatively broad passband.
The front and back surfaces of the filter are coated with Thorlabs' proprietary coating, designated as 'tho fb3250-500'. This coating enhances the filter's performance and durability.
The filter is available for purchase directly from Thorlabs' website, where it is currently listed as 'in stock'. The product's webpage provides additional technical details and specifications, as well as options for customization and additional accessories.