Allied Vision Goldeye CL Series, Техническое руководство

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Filters and mounts
178 Goldeye G/CL Technical Manual V4.2.0
Half Power Points
Points on both sides of the passband curve of a filter, with a transmission rate that
is half of the peak transmittance; the range of wavelengths between these points is
called the
FWHM . The arithmetical mean of the wavelengths of these points is
called the CWL . The half power points define the Cut-on and Cut-off wavelengths.
Single band filter, Dual band filter
Single band filters provide only one passband.
Dual band filters provide two passbands that are separated by a rejection band.
Bandpass filters 1450 nm (water filters)
As an example, the center wave length of a water filter displayed in Figure 50 is
1450 nm with a tolerance of ±7 nm, and a FWHM bandwidth of 26.5 nm. The
maximum transmission of the passband is around 80 percent. Therefore, the
FWHM in this example is defined as the range of frequencies around the CWL
where the transmission is 40 percent or above.
Bandpass filters 1450 nm assembled
Readily assembled mount adapters with optical filter for several lens mounts are
available for purchase from Allied Vision.
In the following table are lens adapters with bandpass filter already fitted. The
bandpass filter has a CWL of 1450 nm and a tolerance of ±7 nm.
Avoid damage to optical filters
To avoid scratching or other damages to optical filters, always store away unused
optical filters carefully.
Description Product code
Adapter from M42 to C-Mount with 1450 nm bandpass filter
Goldeye G/CL-008, G/CL-032, G/CL-033 1068140
Adapter from M42 to C-Mount with 1450 nm bandpass filter
Goldeye G/CL-034 1068240
Adapter from M42 to F-Mount with 1450 nm bandpass filter
Goldeye G/CL-008, G/CL-032, G/CL-033 1068141
Adapter from M42 to F-Mount with 1450 nm bandpass filter
Goldeye G/CL-034 1068241
Table 111: Bandpass filters 1450 nm (sheet 1 of 2)