论文部分内容阅读
近年来,两档变倍和连续变倍的红外变焦距系统获得了普遍的应用。在两个视场相同时,双位置变焦距通常比切换变焦距系统长,但因为切换变焦切换组元需要占用光路外的一段空间,所以双位置变焦距的体积要比切换变焦小。具有一个负变焦组的紧凑的光学补偿切换变焦距系统需要至少三组—一个正的物镜组、一个负的变倍组、一个正的调焦组。通常这些组元由一到两片组成。如果使
In recent years, two zoom and zoom zoom infrared system has been widely used. When the two fields of view are the same, the two-position zoom is usually longer than the switching zoom system, but the two-position zoom has a smaller volume than the switching zoom because switching the zoom switching element takes up a portion of the light outside the optical path. A compact optical compensation switching zoom system with a negative zoom group requires at least three groups - one positive objective group, one negative zoom group, and one positive focus group. Usually these components consist of one to two pieces. If so