Thermal image plates allows us to see IR laser beams with a high resolution. The thermal image plate displays IR laser beam through the use of the thermal-sensitive phosphors. When an IR laser beam strikes the thermal-sensitive surface, the absorbed energy raises the surface temperature and produces a corresponding thermal image. The produced pattern appears as a dark image on a bright fluorescent background when the surface is illuminated by an ultraviolet light.

 

     Applications

  • The fast response time allows it to be used for rapidly viewing rapidly changing laser mode patterns when adjusting resonator mirror
  • The convenient shape permits it to be placed next to optical elements to locate and center beams.
  • The high resolution permits it to be used as a diagnostic tool to examine imperfections in IR optical elements or as an aide in optical alignment.
  • The critical adjustment of a laser interferometer is greatly simplified when the interference fringes of two misaligned beams become clearly visible.

specs

       Specifications

  • Dimensions of Thermal plate : 6″ x 3″ x 0.5″
  • Dimensions of sensitive surfaces : 3″ x 3″
  • The following table gives the specifications of the eight surfaces measured at 8 to 12 microns. For use at 4 to 8 microns, multiply columns a, b and c by 2. For use at 2 to 4 microns, multiply columns a, b and c by 2.5.
Model
Number		 Surface
Number		 Normal
Sensitivity
Range
(a)
w/cm2		 Minimum
Power
Density
(b)
w/cm2		 Damage
Threshold
(c)
w/cm2		 Response
Time
(d)
sec.		 Resolution
(a)
lines/in.		 Fluorescent
Color
22-A 1
2
3
4		 60-200
30-100
15-50
7.5-25		 16
8
4
2		 800
600
350
200		 .03
.03
.03
.03		 300
300
300
200		 yellow
yellow
yellow
yellow
22-B 5
6
7
8		 3.3-11
1.5-5
0.4-2.4
0.06-0.4		 0.9
0.4
0.06
0.01		 100
44
24
4		 0.06
0.15
0.2
1.0		 100
50
100
16		 yellow
yellow
yellow
yellow