METHOD FOR TESTING OPTICAL ELEMENT ARRAY

摘要

PROBLEM TO BE SOLVED: To provide a method for testing optical element array by which the light output characteristic of each element of an optical element array can be measured with accuracy without ignoring thermal effect even when the array has a high degree of integration. SOLUTION: In measuring the light output characteristic of the element 10b-4 of a surface emission type laser element array 10b in which surface emission type laser elements 10b-1 to 10b-20 are arranged in two transversal rows each of which is composed of ten elements, the light output characteristic of the element 10b-4 is measured by only energizing the element 10b-3, 10b-5, and 10b-13 to 10b-15 surrounding the element 10b-4.