IR Light Filters For Security TV-Systems
Are intended for installation before IR searchlights, television cameras, photo receivers in outside and interior alarm-fire alarm signaling systems, including: video monitoring systems both demarcation of access and protection of perimeter of objects, video door-phones, and that similar devices.
Have a spectral characteristic of cutting type: are opaque in visual field of a spectrum, but transmittance in the near IR region.
The Basic Functions
IR filters on the basis of polystyrene [PS] and polymethyl methacrylate [PMMA] are plates of colored organic glasses with glossy [polished] or rough [dim] surfaces. Are easily cut [scribe] at cutting out.
IR filters on the basis of epoxy polymers [EP] are made from optically transparent epoxy casting compositions with the introduced organic dyes. After curing can be used as a package of optoelectronic device, as an optical element [plate, lens] or as a coat.
The optical-geometrical parameters of light filters can tailor, in particular, can be changed wave length of transmission boundary, thickness, sizes, view of a surface [polished, dim, etc.]. To attain the necessary directional pattern imparting light-diffusing properties to light filters, including with change of a chromacity from black up to milky white is possible.
Except for IR light filters a series of light filters of wide color scale for UV and visual region of a spectrum designed. They serve as not only prime elements of optical-electronically devices, but also carry out added function: lens-filter, housing-filter, coat-filter etc.
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