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DTIC ADA082030: Development of Recording Materials for Holographic ... |
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by Defense Technical Information Center |
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This report describes a two year effort on investigating |
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two recording materials for in-situ, real-time |
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holographic nondestructive field testing application, |
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namely, photodielectrics and photoconductorthermoplastic |
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devices (PC-TP). The holographic parameters as well as |
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the recording mechanism of photo-dielectric materials |
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were thoroughly studied. The recording mechanism is |
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attributed to photochemically induced cross links of |
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macromolecules. Resolution on excess of 2500 1/mm and |
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diffraction efficiency approaching 100% were measured. |
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Due to the low exposure sensitivity, about 1 J/sq cm, |
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this recording material could only be incorporated into |
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systems for testing relatively small objects. A number of |
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ways for operating the PC-TP devices more reliably and |
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for improving the spatial bandwidth to over 1800 1/mm |
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were established. Furthermore, the frost formation |
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mechanism was investigated, and means for supressing the |
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frost were determined, thereby leading to improved signal- |
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to-noise ratio. These results together with the high |
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exposure sensitivity (50 erg/sq cm and the improvements |
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in sample fabrication, have led to an operable device |
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which may be incorporated into most holographic non- |
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destructive systems. |
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Date Published: 2017-11-09 14:54:33 |
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Identifier: DTIC_ADA082030 |
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Item Size: 53327483 |
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Language: english |
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Media Type: texts |
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# Topics |
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DTIC Archive; Friesem, A. A.; WEIZMAN... |
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