Nd filters include absorptive and reflective filters, which are used in attenuating lasers and other optical signals. Absorptive filters minimize back reflections, which can be reduced further by adding an antireflection coating to the filter. Reflective filters are available with either a bk7 or uv fused silica substrate.
Specification:
Materials:bk7 optical glass and fused silica etc
Diameter tolerance: +/-0.20
Thickness:0.5-3.0 mm
Parallelism 85%
Optical density tolerance:+/-5%
Coating:specified by customers
The 850nm bandpass filter is used in NIR imaging system to eliminate the influence of surrounding background light, including the visible and NIR light. This filter is to increase the signal/noise ratio of the imager. The applications include video surveillance, visual telephone, visual doorbell, digital telescope and other imaging systems. Specifications: SubstrateFloat glass Size2×2mm~81×81mm Thickness0.4, 0.5, 0.7, 1.1mm Surface Quality40/20, 60/40 Spectrum Characteristic400~800nm T85% Tmin>80% 9501100 nm Tave
All kinds of bespoke optical filters: IR bandpass filters UV bandpass filters heat absorbing filters
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