infrared filter

The infrared filters light up the place like it was daytime.

There was enough heat in the cave now to use the infrared filters.

An infrared filter was mounted just behind the lens mount.

But the infrared filter clicked into place, and the darkness vanished.

The reflected beam passes through an infrared filter to the camera.

Some models have a manual switch to set an infrared filter for day or night mode.

He stuck an infrared filter on his lens.

He thought it was a malfunction until he remembered to key up the infrared filter.

In assembling the Spirit photographs, however, the scientists used an image taken with an infrared filter, not the red filter.

Viewing through infrared filters, they could still see fading colors as the planet's thermal energy bled into space.

Blue, visible, and infrared filters were combined with a filter that isolates hydrogen emission.

The corridor was steeped in viscous darkness, so Root flicked down his infrared filter.

He flipped off the infrared filters.

In infrared photography, infrared filters are used to capture the near-infrared spectrum.

Nevertheless, some "green laser pointer" products have become available on the market which omit the expensive infrared filter, often without warning.

The photographer, an air force pilot, used two film cameras, both fitted with 200mm lenses and infrared filters, and one Digital8 video camera.

With the infrared filter, the different iron minerals emit different colors, and the camera can better differentiate between them.

The blue, visible-light, and infrared filters are represented by the colors blue, green, and red, respectively.

This includes the use of infrared filters on conventional telescopes, and also the use of radio telescopes.

Infrared filters are readily available at low cost from many sources, but ultraviolet filters - and suitable lenses - remain expensive.

The front of the camera has a plastic infrared filter which appears black, this reduces the brightness of non-IR light sources.

The infrared filter was messing with his depth perception and he'd whacked his head on two protruding U-bends so far.

Because the sensor lacks an infrared filter, an IR-cut filter in front of the lens is recommended.

The technology in question, developed at Brigham Young University in Utah, uses a digital camera with a series of ultraviolet and infrared filters.

("Infrared filter" may refer either to this type of filter or to one that blocks infrared but passes other wavelengths.)