کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9424159 1295252 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A self-mixing laser-diode interferometer for measuring basilar membrane vibrations without opening the cochlea
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
A self-mixing laser-diode interferometer for measuring basilar membrane vibrations without opening the cochlea
چکیده انگلیسی
A laser-diode forms the basis of a displacement sensitive homodyne interferometer suitable for measurements from poorly reflective surfaces. The compact and cost-effective interferometer utilizes the self-mixing effect when laser light reflected from a moving target re-enters the laser cavity and causes phase dependent changes of the lasing intensity. A piezo positioner was used to displace the interferometer with known frequency and amplitude as a basis for real-time calibration of the interferometer's sensitivity. The signal-processing algorithm is described that allows measurements in presence of high amplitude noise leading to variation of the interferometer's operating point. Measurements of sound-induced basilar membrane displacements were made in the intact cochleae of rodents by focusing the laser beam of the interferometer through the transparent round window membrane. The interferometer provides a viable means for making subnanometre mechanical measurements from structures in the inner ears of small mammals, where opening of the cochlea is not practicable.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Neuroscience Methods - Volume 148, Issue 2, 30 October 2005, Pages 122-129
نویسندگان
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