| 摘要 |
PROBLEM TO BE SOLVED: To prevent mutual interference without requiring complicated works in a case where a plurality of photoelectric switches are arranged side by side. ! SOLUTION: A photoelectric switch system comprises a plurality of photoelectric switches arranged side by side and including a light projection unit 1 which projects light to a detection region, a light-receiving unit 2 which is disposed facing the light projection unit 1 across the detection region and receives the light from the detection region, and a detection unit 5 which detects whether an object exists in the detection region on the basis of the amount of light received by the light-receiving unit 2. The photoelectric switch includes a first circular polarization filter 3 which is provided on a light projection surface of the light projection unit 1 and transmits only circular polarization components of incident light whose specific rotation directions differ from each other between adjacent light projection units 1, and a second c |
