-
650 nm Short Pass, 25.4 mm Dia.
Short Pass Filter Specifications | SP-650-25
Cut-Off Wavelength
650 nm
Cut-Off Wavelength (Range)
600 – 700 nm
Cut-Off Tolerance
±3 nm
Transmission Region
Cut-off λ to 455 nm
Minimum Peak Transmission
80%
Slope (OD 0.3 to 4.0)
≤ 5%
Blocking
10-4 Min. / 10-5 Avg. to 845 nm
Size (mm)
25 mm dia.
Size Tolerance
+0.0/-0.2 mm
Thickness
6.3 mm
Thickness Tolerance
+0.0/-0.2 mm
Scratch/Dig
80/50
Clear Aperture
21 mm
Mount
Aluminum, Black Anodized
Operating Temperature Range
-20⁰ C to 75⁰ C
Optometrics
Shortpass Filters with Transmission Region Cut-off λ to 455 nm
Shortpass Filter
A shortpass filter or short wavepass filter (SP filter) is a filter that transmits at shorter wavelengths and rejects longer wavelengths. By design, the transition in a shortpass filter between the 50% cut-off or cut-on to rejection is quite sharp. This makes it much easier to separate excitation from emitted wavelengths without interfering with wavelengths of interest. Shortpass filters are useful in applications where spectral noise reduction is important or for isolating a particular region of the spectrum.
- Emission filters in fluorescence applications
- Eliminate unwanted radiation over ultraviolet, visible, or infrared
- Ideal for Raman spectroscopy
- Order sorting filters
- Astronomy applications to study IR radiation without visible light
- Laser-induced fluorescence to isolate source radiation
- Available every 50nm from 450nm to 1000nm
- Mounted in a black anodized aluminium ring
- Use in combination with longpass filters for custom bandpass filtering
- Fine tune cut-on wavelengths by changing angle of incidence
