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

  • Maintenance of lighting secretiveness of protected objects, elimination of luminous "points" from IR-emitting diodes, bulbs filament.

  • Performance of functions of protective panels, windows and screens, masking of objectives of TV-cameras, "stuffing" of other receiving devices.

  • Elimination of parasitic noises, lighting from radiation of a visible band without impairment and contortion of a useful signal.

Polymeric Matrix

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.

Technical Characteristics

Mark Polymeric Basis Thickness, mm Geometrical Sizes, mm Transmission Boundary, µm Transmittance at 0,87 µm
PS-1 PS 1 - 3 240 * 240 0,75 85 - 88
PS-2 PS 2 - 3 300 * 300 0,76 83 - 88
7.1 PMMA 2 - 2,5 380 * 435 0,66 91 - 92
1.1 PMMA 1 - 2,5 380 * 435 0,69 91 - 92
1.6 PMMA 4 380 * 435 0,69 91 - 92
1.4 PMMA 2 210 * 215 0,69 light antispot
3.1 PMMA 2 - 2,5 380 * 435 0,72 91 - 92
900 EP 0,5 - 3 Ø 50 0,70 87 - 90
PSX EP 0,5 - 3 Ø 30 0,74 85 - 88
PSX-Y EP 3 - 4 120 * 160 0,78 70 - 75

 

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. 

For technical questions and sales please contact:
e-mail: info@lfpti.ru

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