Resistance is 0.6 Ohm. looks like I have damaged GRN of my scope , that is why I have all this weird pictures that have no sense .
one more attempt. I install parallel to U1(4N35) optocoupler MOC3041 and connect pin 6 with same signal that is going to pin5 of U1 ,and you can see now what i have on channel 2 of my scope monitoring pin4 of this MOC3041.
