TEMPORAL REFERENCE ACOUSTICAL HOLOGRAPHY

被引:15
作者
METHERELL, AF
SPINAK, S
PISA, EJ
机构
[1] Douglas Advanced Research Laboratories, McDonnell Douglas Corporation, Huntington Beach, CA
关键词
D O I
10.1364/AO.8.001543
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
This paper describes a new form of holography which obviates the need for a reference wave (real or electronically simulated). An experiment is described where reconstructions were obtained from a temporal reference acoustical hologram which was recorded at 4.8 MHz using a Sokolov ultrasound camera system. An optical method for recording a large aperture temporal reference acoustical hologram which is currently under development at the Douglas Advanced Research Laboratories, uses a double pulsed ruby laser system which introduces a quarter wavelength shift in the optical reference (or object)beam between the two pulses which are timed half an acoustic cycle apart. The quarter wavelength shift allows a subfringe interferometric hologram of an acoustically vibrating surface to be recorded, where, under appropriate conditions the intensity of the reconstructed surface is linearly proportional tothe displacement of the surface between the two pulses. The pulsed laser interferometric hologram isthus an optical hologram of an acoustical temporal reference hologram. A second method of optically recording temporal reference acoustical holograms which employs a scanning cw laser is described. Theimportant advantages expected of both these optical techniques are: (1) the total recording time is short(half an acoustic cycle) and thus the techniques are more tolerant of object motion; (2) the area of thetemporal reference acoustical hologram will be significantly larger than obtainable with conventionalmethods; (3) the necessity and complexity of electrons detection (large arrays or scanning) is eliminatedand replaced by the high bandwidth recording capability of optical holography; (4) direct remotesensing of the acoustical object wave is achieved. © 1969 Optical Society of America.
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页码:1543 / +
页数:1
相关论文
共 26 条
[1]   AN INSTRUMENT FOR MAKING SURFACE WAVES VISIBLE [J].
ADLER, R ;
KORPEL, A ;
DESMARES, P .
IEEE TRANSACTIONS ON SONICS AND ULTRASONICS, 1968, SU15 (03) :157-+
[2]  
BERGER H, 1969, ACOUSTICAL HOLOGRAPH, P27
[3]  
BRENDEN BB, 1969, ACOUSTICAL HOLOGRAPH, P57
[4]   X-BAND HOLOGRAPHY [J].
DOOLEY, RP .
PROCEEDINGS OF THE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, 1965, 53 (11) :1733-+
[5]  
FERGASON JL, 1969, ACOUSTICAL HOLOGRAPH, V2
[6]   A NEW MICROSCOPIC PRINCIPLE [J].
GABOR, D .
NATURE, 1948, 161 (4098) :777-778
[7]   MICROSCOPY BY RECONSTRUCTED WAVE FRONTS .2. [J].
GABOR, D .
PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON SECTION B, 1951, 64 (378) :449-+
[9]  
GABOR D, 1949, P ROY SOC LOND A MAT, V197, P458
[10]  
JACOBS JE, 1965, SCIENCE J LONDON, P60