音波ホログラムからの再生像の解析
1968 年 37 巻 3 号 p. 243-253
詳細
1968 年 37 巻 3 号 p. 243-253
Theoretical and experimental analyses on the images reconstructed from acoustic holograms are conducted. The sound waves are used to construct the acoustic holograms, with the frequencies of 10kHz_??_20kHz. The optical reconstruction is made to use laser light (6328Å). The virtual and the conjugate images are observed. The relation between the light intensity levels converted from the acoustic fields and the reconstructed images is discussed. The effect of the scanning lines produced by the scanning of a microphone to the reconstructed images is analyzed. An improvement of the reconstructed images is done eliminating the spectrums of the scanning lines. The effects of the limitation of the hologram plane and frequency-chaging of the sound waves to the reconstructed images are also analyzed. Further, the basic consideration on the three dimensional information storage in the acoustic holagrams is made.
