一、引言国际航标协会(IALA)1977年12月颁发的《关于海上航标灯发光强度测定的建议》(即参考①)规定,每当可能时,应对灯的每一闪光过程中随时间变化的发光强度进行测量。闪光有效光强的定义如下:假若一个闪光与一个具有光强 Ie 的定光在相同的距离、相同的大气环境下恰好同时被看见,则可认为此闪光具有有效光强 Ie。在计算给定大 I. INTRODUCTION The IALA’s “Proposal for Determination of the Luminous Intensity of Sealamp Lights” (ie reference 1) issued by the IALA in December 1977 stipulates that whenever possible, the time lapse of each flashing of the lamp shall be met Luminous intensity is measured. The effective light intensity of a flash is defined as follows: If a flash is exactly the same as a fixed light having a light intensity of Ie at the same distance and in the same atmosphere, the flash can be considered as having an effective light intensity Ie. Given a given large