Specialty Filters

Iridian supplies a wide variety of custom designed filters ranging from one-off large and complex filters, such as those for astronomical observations, to very high volumes of low cost filters used in consumer related applications such as 3D cinema or simpler anti-reflection coatings. Some particular examples are illustrated below. We invite you to discuss your requirements with us and our engineers will work with you to find the optimum filter solutions at the lowest possible cost.

 

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  • 3D Cinema

    One popular technique for 3D cinema projection utilizes color-banding to achieve a 3D perspective. That is, the left and right eyes each view a different set of wavelength bands spread throughout the visible spectrum so as to preserve the color balance...
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  • Laser Reflection Glasses

    Iridian’s New LaseReflect® Glasses There are increasing problems arising from the widespread availability of cheap and high power hand-held laser pointers, particularly in the transportation industry where operating staff in aircraft, trains or even buses may require eye protection devices in order to avoid being dazzled or even suffering eye damage. Iridian has introduced laser reflection eye glasses, LaseReflect, designed to reflect common […]
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  • Multi-Zone Filters (MZF)

    The ability to offer spatially varying spectral performance on a single substrate can have many advantages for optical designers. Iridian offers both assembled multi-zone filter arrays and patterned multi-zone optical filters (sometimes referred to as multi-spectral filters (MSF)) to address these growing needs. Features of Iridian’s MZF offerings include: Filter types: Long-pass or short-pass filters […]
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  • IR Filters

    Iridian has the capability to manufacture standard filter types (AR, beamsplitters, bandpass and edge filters) in the SWIR (1.4-3 µm), MWIR (3-8 µm) and LWIR (8-15 µm) spectral ranges. Iridian’s SWIR and MWIR coatings (and some LWIR coatings) are primarily deposited by sputtering which makes them very robust.  For the LWIR coatings above 10 µm, ion-assisted evaporation of […]
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  • Beam Splitter Cubes / Prisms

    Polarizing or non-polarizing beam-splitter cubes and prisms are used to transmit one wavelength band (either polarized or non-polarized) in one direction and reflect another wavelength band...
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  • Beam Combiner Filters

    Beam Combiner filters are used to combine two free space different beams with different wavelengths into one beam with both wavelengths combined...
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  • Stray Light (Black) Absorbers

    For many applications, it is useful to have surfaces that can absorb any light that falls on them. For instance, on the inside of optical instruments, this type of surface would be used to minimize the amount of stray ambient light...
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  • Surface Enhancement Coatings

    Iridian has the capability to deposit different types of surface enhancement coatings including "anti-smudge" and "anti-fog" coatings, on areas up to 250 mm x 350 mm...
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