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Filter
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Absorption, and particularly wavelength selective absorption
is an important factor in the function of the filters. The two most commonly used
absorbers are thin metallic films which are particularly insensitive to wavelength
for absorption, and colored glasses which absorb wavelengths varied by as much as
several orders of magnitudes in only tens of nanometers. Interference filters are
multilayer dielectric thin film devices. Metallic films, colored glasses and thin
dielectric films are used in our filters.
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Band Pass
Filters
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Applications:
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 Emission filters in
fluorescence
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Sorting filters in photometry
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Stray light or trim
filters
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Eliminate unwanted near
band radiation
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◆Filter for 671 nm laser (Filter-671)
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λ (nm)
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Transmittance
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1060
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0.01
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0.37
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670
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0.77
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660
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0.82
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0.82
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0.87
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560
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0.97
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0.95
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370
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0.94
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280
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0.01
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◆Filter for 473 nm and 532 nm laser(Filter-473/532)
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λ (nm)
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Transmittance
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700
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0.01
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0.06
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0.82
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0.97
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470
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0.97
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0.90
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350
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0.65
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320
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0.04
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◆Filter for 1064 nm laser(Filter-1064)
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λ (nm)
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Transmittance
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800
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5*10-4
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0.25
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0.75
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0.97
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980
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0.97
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0.98
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1300
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0.98
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1900
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0.98
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2700
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0.83
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Note: Different
dimensions are available upon request.
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