| 摘要 |
<p>A preferred embodiment of this invention is illustrated in Fig. 4 showing an offset and tilted object transducer (50) being rotated about a system axis (51) to sequentially insonify the object from various acute incident angles Υ to the system axis to provide images of the out-of-focus structures at spaced locations at the hologram detection surface (18) at different spaced times. If the pulse rate of the object transducer is greater than the fusion of the eye, the eye is able to average two or more images into a single perceived image. Likewise, video equipment that receives images at a rate greater than 30 Hertz will average two or more images and display the image at a rate of approximately 30 Hertz. Additionally, external video processing may be utilized to electronically average two or more images electronically to obtain an averaged image at any time constant desired by the operator. Such a system effectively neutralizes or blends the out-of-focus structure of an object spaced from a selected focus plane (27) while maintaining the structure within the plane in sharp consistent contrast to provide consistent, quality images of the internal structure of an object (12).</p> |
