Infrared holography using the thermochromic material Cu(2)Hgl(4).
Thermochromic materials can be used to record infrared holograms at 10.6 microm as has been demonstrated by others. The objective here was to determine quantitatively the capability of holographic recording techniques that utilize thermochromics. Particular emphasis is placed on cuprous mercuric iodide, but the procedure developed is valid for other thermochromic materials. The thermochromic Cu(2)HgI(4) mixed with a suitable binder and coated onto a temperature controlled substrate was used to record holograms at a wavelength of 10.6 microm. Thermal diffusivity and conductivity of the recording material (Cu(2)HgI(4) + binder) were measured and used to analyze the thermal behavior of the detector. Theory shows that a resolution of 50 l/mm can be attained. Experiments were conducted to demonstrate the theoretical predictions. Holograms were recorded and reconstructed at the wavelength of 10.6 microm.
Yang
J M
JM
Sweeney
D W
DW