公开(公告)号：US3754208A

公开(公告)日：1973-08-21

申请号：US3754208D

申请日：1972-02-03

Applicant: STANFORD RESEARCH INST

Inventor： EILERS G

IPC: G10K11/30 ,  G01F3/16

CPC classification number: G10K11/30

Abstract: A compound lens structure for converting the response of a transducer of large lateral extent to one of significantly smaller dimensions employs a converting lens having a conical front surface in contact with the rear surface of an auxiliary hemispherical lens to allow spherical sonic waves emanating from or converging toward the point of contact to enter or leave the converting lens only through the area of contact. The rear surface of the converting lens is chosen to be a hyperbola of revolution in order that diverging waves entering through the area of contact be refracted into plane waves transmitted to the transducer. Space between the two lens is sealed and filled with a gas to enhance the masking effect of the conical surface by total reflection of waves entering that sealed space from the auxiliary lens.

Abstract translation: 用于将大横向范围的换能器的响应转换成明显较小尺寸之一的复合透镜结构使用具有与辅助半球形透镜的后表面接触的锥形前表面的转换透镜，以允许发出或收敛的球形声波 接触点只能通过接触区进入或离开转换镜头。 转换透镜的后表面被选择为旋转的双曲线，以便通过接触区域进入的发散波被折射到传输到换能器的平面波中。 两个透镜之间的空间被密封并充满气体，以通过从辅助透镜进入该密封空间的波的全反射来增强锥形表面的掩蔽效果。