Holographic vibration measurements of rough surfaces using a LCSLM

✍ Scribed by Kiyofumi Matsuda; Bi Qing Ye; Norihiro Fukuchi; Hiroshi Okamoto; Tsutomu Hara

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 279 KB
• Volume: 275
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2007.03.023

✦ Synopsis

This paper describes measurements of a vibrating object with rough surface by the time-averaged method of holography using a newly designed optically addressed liquid crystal spatial light modulator with a resolution of 102 lp/mm and a diffraction efficiency of 16%. An object vibrating faster than several tens of Hz could be visualized. The pattern obtained by the method provides the locus of vibrating nodes. The advantage of this method is that a high contrast pattern of a vibrating object can be imaged in near-real-time, although the sensitivity of vibration is decreased.