11-989 25 mm Dia. First Surface UV Bandpass Filter; t=1.5 mm 248nm
- Type
- Filter
- Subtype
- Bandpass Filter
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- Cut Off Frequency
- 253 nm
- Cut On Frequency
- 243 nm
Material
- Name
- UVFS
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5085507095161235
- λ
- 248 nm
- B1
- 0.6961663
- C1
- 0.004679148 μm2
- B2
- 0.4079426
- C2
- 0.013512063 μm2
- B3
- 0.8974794
- C3
- 97.93400254 μm2
11-989 25 mm Dia. First Surface UV Bandpass Filter; t=1.5 mm 248nm
The 11-989 is a 25 mm diameter First Surface UV Bandpass Filter, with a thickness of 1.5 mm and a central wavelength of 248nm. This filter, offered by Edmund Optics, is designed to transmit light within a specific range of wavelengths while blocking unwanted light outside this range.
The filter's bandpass characteristics are defined by its cut-on wavelength at 243nm and cut-off wavelength at 253nm. These values represent the transition points where the filter begins and stops transmitting light, respectively. The central wavelength (CWL) of 248nm falls within this range, indicating the peak transmission efficiency.
The filter is made from UVFS Mal-1965, a material specifically designed for UV applications. It features a Thin Lens shape, which is ideal for applications requiring minimal optical path deviation. The front and back surfaces of the filter are coated with EDM 11-989, a coating that enhances the filter's performance and durability.
According to the vendor's information, this filter is currently in stock, and you can find more details or purchase it from the following link: https://www.edmundoptics.com/p/248nm-10nm-fwhm-25mm-dia-first-surface-uv-bandpass-filter/40731/