| 摘要 |
PROBLEM TO BE SOLVED: To solve problems in a conventional instrument for measuring optical directional characteristics that it has many movable parts, its structure is complicated, and it is expensive, and further, it takes long in measurement to cause the temperature of a light emitter to rise, preventing its optical directional characteristics from being accurately measured.SOLUTION: This instrument for measuring optical directional characteristics includes a light emitter 3, a reflection means 2, light receivers 5n, and a data processing means 10. In this instrument, the reflection means 2 is a screen 2 having a curved or recessed reflective surface 2a; the light emitter 3 is provided substantially in the center position of the screen 2 on the reflective surface 2a side; the plurality of light receivers 5n are provided in the vicinity of the light emitter 3; and the data processing means 10 comprises a light emitting characteristic calculator 70 for calculating light emitting characteristic data D3 on the light emitter 3 based on a plurality of light receiving output signals Sn of the light receivers 5n. |
