Kw. Kim et al., MEASUREMENTS OF THE TEMPERATURE DISTRIBUTION OF A SHADOW MASK IN A CATHODE-RAY TUBE BY USE OF A RADIATION THERMOMETER, Measurement science & technology, 8(11), 1997, pp. 1328-1332
This paper presents an experimental study of non-contact temperature m
easurements for the shadow mask in a cathode-ray tube (CRT) by use of
a radiation thermometer. As the demand for large and flat CRTs and hig
h resolution increases, it becomes more important to design the shadow
mask assembly precisely, even for the Invar shadow mask CRT that brin
gs about a shift of the landing site of the order of a few micrometres
. To do this, first of all knowledge about the temperature distributio
n of the shadow mask is needed. However, up to now most researchers co
uld not measure the temperature distribution of a shadow mask. We stud
ied a method for measuring the temperature distribution of a shadow ma
sk for a 17 '' CRT. Considering the energy and the wavelength passing
through the face plate, we equipped the radiation thermometer with an
indium antimonide (InSb) photo-sensor. Experiments using the thermocou
ple were performed to validate the results of non-contact measurement.
The results agree well with those of a non-contact method using an In
Sb sensor.