OPTICAL TRANSMISSION DUCT

摘要

PROBLEM TO BE SOLVED: To efficiently transmit light in a bent part. SOLUTION: This optical transmission duct 12 reflects sunlight in a bent part 16 to transmit it. The bent part 16 is formed by cutting a vertical duct part 17 and a horizontal duct part 18 sandwiching the bent part 16 at a half angleαof an angleθof the bent part 16 and joining the cut ends 19, 20.