Filter Protects HD Cameras From Invisible IR Light

A California-based company, Schneider Optics has introduced the TRU-CUT IR-750 filter, which it said is designed to eliminate light in the infra-red (IR) spectrum, before it reaches a High Definition camera's sensors.
A spokesman said: "Most High-Definition cameras have a high sensitivity to light in the IR spectrum, and though the IR light is not visible to the human eye, it can result in odd colour shifts and prevent a camera's imagers from capturing true black tones.
"As digital cinematographers use multi-stop neutral-density (ND) filters to allow them to open their lens iris for more depth of field, IR light begins to dominate light from the visible spectrum, making its pollution more apparent."
As a result, Schneider, a leader in precision optics for nearly a century, developed its TRU-CUT IR-750 filter to remove the IR spectrum from the light path, resulting in more vibrant colors and true black tones from both CCD and CMOS sensors.
The TRU-CUT IR filter blocks the IR light mere nanometers from the visible spectrum, cutting IR pollution from the image.
The filter also maintains a high MTF (modulation transfer function) in the visible spectrum and its coating meets or exceeds military standards for durability, thus is easily cleaned.
Like all Schneider professional filters, the TRU-CUT IR-750 filter is manufactured from crystal clear, water white optical glass that is diamond cut, precision ground and polished to the most exacting tolerances.
TRU-CUT IR-750 filters are available in standard sizes, including: 4x4, 4x5.65, 5x5, 5.65x5.65, 6.6x6.6 rectangular sizes plus rounds including 138mm, 77mm, 4.5” and Series 9.
(BMcC)