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Portable, high-resolution and user-friendly holographic camera

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  • Photorefractive Crystals
  • Holographic Interferometry
  • Physical
  • Chemical
  • Mathematical & Earth Sciences :: Physics [G04]
  • Physique
  • Chimie
  • Mathématiques & Sciences De La Terre :: Physique [G04]


HOLOGRAPHY NEWSLETTER NOW AVAILABLE ON-LINE Technical Group members are being offered the option of receiving the Holography Newsletter electronically. An e-mail is being sent to all group members with advice of the web location for this issue, and asking members to choose between the electronic and printed version for future issues. If you are a member and have not yet received this message, then SPIE does not have your correct e-mail address. To receive future issues electronically please send your e- mail address to: [email protected] with the word holography in the subject line of the message and the words electronic version in the body of the message. If you prefer to receive the newsletter in the printed format, but want to send your correct e-mail address for our database, include the words print version preferred in the body of your message. MAY 2002 VOL. 13, NO. 1 SPIEÕs International Technical Group Newsletter Technical Group Registration Form—See page 11 Portable, high-resolution, and user- friendly holographic camera Holographic interferometry (HI) is a powerful whole-field optical method that allows contactless displacement measurements in the micron to sub- micron range. It is used in numerous applications including strain/stress analysis, flow/damage detection, and resonance-mode visualization and measurement. A crucial element of HI is the photosensitive medium used for holographic recording. Their prin- cipal figures of merit for such media are generally energetic sensitivity and diffraction efficiency, but other fea- tures—such as self-processing and the erasability/reusability of the me- dium—can appear more important in their practical applicability to HI. Photorefractive crystals (PRCs)1 of the sillenite family (Bi12SiO20, Bi12GeO20) are interesting recording media for HI. Although about 1000 times less sensitive than classical recording media (silver halides, ther- moplastic plates), sillenite PRCs are self-developing and indefinitely re- usable. They w

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