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Laser Scanner Filter, 650+/-25nm Narrow Bandpass Filter
 Home > Filters > Bandpass Filters > Visible Bandpass > Laser Scanner Filter, 650+/-25nm Narrow Bandpass Filter
Laser Scanner Filter, 650+/-25nm Narrow Bandpass Filter

Centre Wavelength(CWL):
650nm+/-2nm, T=50% @ 625nm, 675nm
FWHM(50% point):
50+/-2nm @ 625-675nm
Tave>90% at CWL=650nm. Tave<5% @ 200-600nm, 700-1100nm
customized, from 2x2mm to Dia. 110mm, +/-0.1mm
Surface quality:
Clear aperture:
>90%, or full surface coatings
vary customized, such as B270, BK7, crystal, float or sodalime glass etc.
designed for 640nm, 647nm and special 650nm laser scanner or laser semiconductor use
Singlet piece, not bonded
can be bonded with other filters for some special applications.
The type of 650+/-25nm bandpass filter, based on the common application, is usually called Laser Scanner Filter, which is commonly used with 650nm laser light sources. It only transmit the small bandwidth of red laser light, such as 650+/-25nm, or 650+/-15nm, but block or reflect all the other spectrums. The blocked rate is not strict for these types of application, because most laser scanner application just mainly required the T>90% @ 650+/-25nm range. This type of filter is not designed for imaging forming system, but usually for laser semiconductor use, such as laser bar code scanner, laser measuring equipment, 647nm laser light source device, NIR range finder, fingerprint identification system etc.  

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