Electrophysics' Infrared Sensitive
Cards offer users of infrared optical devices an easy
way to locate laser beams and estimate beam-size, troubleshoot
problem areas and test infrared emitting devices.
These easy-to-use cards consist of an
IR-sensitive phosphor material (2"x 2") laminated
in clear plastic. After being exposed to room light
(400-500nm) for about one minute (for activation of
the phosphor), these cards will emit a visible glow
when illuminated by near-infrared radiation. The intensity
of the glow depends on the intensity of the infrared
illumination. Applications include: laser beam finding,
alignment and beam-sizing approximation, IR remote
control troubleshooting, IR security system alignment
and testing.
Models
Several models of Infrared Sensitive
Cards are available. Selection depends on the spectral
range and sensitivity required. As shown, if the wavelength
range of interest is 800-1300nm, the IRC42R delivers
the highest efficiency. For imaging 1300-1700nm, the
IRC32R is superior. Note that these cards normally
require less incident power density when used in a
darkened environment as compared to a well-lit environment.
This is due to the fact that in a well-lit environment,
the phosphor will respond to the ambient light levels.
In addition, in a darkened environment the human eye
becomes dark-adapted and consequently is more sensitive
to the lower emissions. |
