PROJECTOR FOR SURVEILLANCE CAMERA

摘要

PROBLEM TO BE SOLVED: To provide a projector which can project the entire area within the angle of view of a surveillance camera with a nearly ideal irradiation pattern and irradiation energy distribution and uses LEDs as light sources.

SOLUTION: A plurality of the surface packaging type LEDs 10 are longitudinally and horizontally packaged in a matrix on both sides across a circular through-hole 15 of a printed circuit board 9 which is provided with the circular through-hole 15 for fixing the camera at the center and is provided with rectangular through-holes 16 for fixing a pair of matrix Fresnel lenses 14 on the respective both sides across the circular through-hole 15. The pair of the matrix Fresnel lenses integrated by arranging the Fresnel lens elements applied with prescribed lens cutting respectively in the positions corresponding one to one to the respective LEDs 10 are mounted above the LEDs 10 by locking the rectangular through-holes 16 disposed in the printed circuit board 9 with locking pawls 19 disposed at the Fresnel lens elements 17.

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