公开(公告)号：US3704659A

公开(公告)日：1972-12-05

申请号：US3704659D

申请日：1970-10-15

Applicant: NASA

Inventor： DOBIES EDWIN F

IPC: G03B9/08 ,  G03B9/10

CPC classification number: G03B9/10 ,  G03B9/08

Abstract: A cyclically operable, optical shutter particularly suited for use as a focal plane shutter, characterized by an occulting disk having a pair of radiation occulting sectors defining therebetween a pair of diametrically opposed, radiation transmitting sectors driven in rotation by a D.C. motor. A particular feature of the shutter resides in a combination of a servo-control system with the motor for accelerating the disk from a steady state of zero velocity to a preselected steady state of angular velocity, maintaining the steady state during a predetermined period of radiation transmission, and subsequently decelerating the disk to a steady state of zero velocity within a fraction of a single revolution, whereby a pulse of radiation having a preselected width is gated through an associated aperture with a high degree of uniformity and reproducibility.

Abstract translation: 特别适合用作焦平面快门的可循环操作的光学快门，其特征在于具有一对辐射遮蔽扇区的掩蔽盘，在其间界定由直流电动机旋转驱动的一对直径相对的辐射传输扇区。 快门的一个特征在于伺服控制系统与马达的组合，用于将磁盘从零速度的稳定状态加速到预定的角速度稳定状态，在预定的辐射传输期间保持稳定状态 ，然后在一圈的一分钟内将盘减速到零速度的稳定状态，由此具有预选宽度的辐射脉冲通过相关孔径以高度的均匀性和再现性来选通。