THORLABS BC207UV, Operating Manual

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BC207 Series Chapter 3: Operating Elements
Page 5
MTN026962-D02
3.1.1.1 Filter Wheel
The Thorlabs BC207UV(/M) and BC207VIS(/M) Camera Beam Profilers are equipped with a fil-
ter wheel containing six different neutral density (ND) optical attenuation filters. The filter wheel
is designed to quickly and easily adapt the light source power to a power level within the dy-
namic range of the CMOS camera. Please make sure to stay below the saturation power of the
camera.
The filters come in a fixed configuration. A small window on the housing above the input aper-
ture shows which filter is selected. The filter types and their nominal losses are model depend-
ent as they are optimized for the wavelength of the BC207 Series model. Please find informa-
tion on the pre-configured filters and links to the respective website in the tables below.
Model BC207UV(/M) accommodates for a wavelength range between 245 - 400 nm. Please
use the reflective filters NDUVxxB for applications between 245 nm and 350 nm with the
BC207UV(/M). For applications above 350 nm, absorption filters can be used alternatively.
BC207UV(/M)
Name on Filter Wheel Filter Type
NDUV20B 20 dB UV Fused Silica Reflective ND Filter, 200 nm - 1200 nm
NDUV30B 30 dB UV Fused Silica Reflective ND Filter, 200 nm - 1200 nm
NDUV40B 40 dB UV Fused Silica Reflective ND Filter, 200 nm - 1200 nm
NE20B 20 dB UV Absorptive ND Filter, 400nm - 650 nm
1
NE30B 30 dB UV Absorptive ND Filter, 400nm - 650 nm
1
NE40B 40 dB UV Absorptive ND Filter, 400nm - 650 nm
1
1
These filters are provided for use near the 400 nm upper wavelength range of the
BC207UV(/M).