| 摘要 |
PROBLEM TO BE SOLVED: To conduct effective unmanned monitoring. SOLUTION: This device comprises a controller 8 for controlling a focal distance of a camera 5 supported by a biaxial turn device 1 to be turned biaxially, and a detector for detecting two anglesθ,ϕaround two axes of the biaxial turn device 1. A known function L (θ,ϕ) having the two anglesθ,ϕas variables is a focal distance. The function L (θ,ϕ) is found by the two anglesθ,ϕ, and the two anglesθ,ϕare detected in a real time to provide a substantial automatic focusing function. |
