Abstract
Digital Holography (DH) in the infrared (IR) range presents some peculiar aspects
compared with the more common DH in the visible range. The current major drawback is due to
the size of the pixel pitch of presently available thermal cameras, which is rather large
compared to what would be optimal, and what is possible with analog films. However, since the CO<sub>2</sub> laser wavelength is 15 times longer than average visible wavelength, a much higher
stability, a wider view angle, and shorter acquisition
distances are achievable, allowing easier acquisition
of large object holograms.We present test results of DH in the IR range, in several
configurations, in transmission and reflection mode
and their performance when used on several different materials. Moreover, we show the
feasibility of large object holography using a CO<sub>2</sub> laser and a digital thermal camera.
© 2010 IEEE
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