公开(公告)号：US3761184A

公开(公告)日：1973-09-25

申请号：US3761184D

申请日：1972-02-07

Applicant: ITEK CORP

Inventor： MC LAUGHLIN J

IPC: G01J1/04 ,  G01J1/42 ,  G01J3/46 ,  G02B3/00 ,  G02B3/08

CPC classification number: G01J1/04 ,  G01J1/0411 ,  G01J1/0488 ,  G01J1/4228

Abstract: A laser detection system for examining a large field of view to determine if the system is being illuminated by laser radiation at a specific frequency. The system includes a first positive lens system for gathering light over a large field of view and for substantially collimating the light for passage through an interference filter. The interference filter allows the passage of radiation in a narrow bandpass region about the specific frequency of laser radiation of interest. Radiation passing through the filter is then condensed by a second positive lens system and directed onto a photosensitive detector. The first and second lens systems form an image of the detector at the entrance to the first positive lens system which defines the entrance aperture to the laser detection system. In the preferred embodiment the first and second positive lens systems each consist of a hyperhemispherical lens and a fresnel lens.

Abstract translation: 一种用于检查大视野以确定系统是否以特定频率的激光辐射照射的激光检测系统。 该系统包括第一正透镜系统，用于在大视野上聚集光并且用于基本准直光以通过干涉滤光器。 干涉滤波器允许围绕感兴趣的激光辐射的特定频率的窄带通区域中的辐射通过。 然后通过过滤器的辐射被第二正透镜系统冷凝并引导到光敏检测器上。 第一透镜系统和第二透镜系统在第一正透镜系统的入口处形成检测器的图像，其定义了激光检测系统的入口孔。 在优选实施例中，第一和第二正透镜系统各自由高半球形透镜和菲涅尔透镜组成。