The first term represents the spectral emission from the surface, while the second term represents the reflected radiant intensity
A typical radiant intensity
of 650 mW/sr at a DC current of 1 A (4232).
While standard IR emitters typically offer drive currents to 100 mA, the low thermal resistivity of the VSLB9530S allows continuous drive currents up to 150 mA, which pushes the achievable radiant intensity
to 60 mW/sr at 150 mA.
This device produces a radiant intensity
(850 nm) typically of 1,000 mW/sr at 1,000 mA.
12] hertz and that has a radiant intensity
in that direction of 1/683 watts per steradian.
In remote control operation, the transceiver features wide transmission angle (30 degrees minimum) and high radiant intensity
(40 mW/sr typical) to make it easy to aim.
The instrument is suitable for luminous or radiant intensity
measurements, tunnel brightness, total luminous or radiant flux measurements, device brightness, signal brightness, and equipment and device illumination measurements.
And for small angles of roughly three degrees, values of up to 700 mW/steradiant (measuring the radiant intensity
of sharply focusing infrared emitting diodes) can be achieved, even with a small chip.
The company's processing technique accommodates fabrication of pixels 25 microns square with radiant intensity
of 25 [micro]W to 75 [micro]W per steradian at 3 mA depending on wavelength.
Infrared radiant intensity
can be hazardous to the human eye if it does not fall within specified safe limits, and a warning label is mandated if a product fails to meet the IEC standard.