set pol c+ off -1.0
otf 445 475 2.0 
file Ti_plus
start


set pol c- off 0.5
otf 445 475 2.0 
file Ti_minus
start


set pol c+ off 1
otf 518 560 2.0 
file O_plus
start

set pol c- off 3
otf 518 560 2.0 
file O_minus
start