实验4：光的折射、偏振、干涉和绕射lab4-refraction,

实验4：光的折射、偏振、干涉和绕射lab4-refraction,内容摘要：

er beam path. PhysicsNTHU MFTai戴明鳳 Class 4 Lasers 1. Enclose the entire laser beam path if at all possible. If this is done, the laser device could be considered to be a less hazardous classification. 2. Confine indoor laser operation to a lighttight room with interlocked entrances to assure that the laser cannot emit when a door is open. 3. Insure that all personnel wear adequate eye protection, and if the laser beam irradiance represents a serious skin or fire hazard that a suitable shield is present between the laser beam and the any persons in the room. 4. Use remote firing and video monitoring or remote viewing through a laser safety shield where feasible. 5. Use beam traverse and elevation stops on outdoor laser devices to assure that the beam cannot intercept occupied areas or intercept aircraft. 6. Use beam shutters and laser output filters to reduce the laser beam irradiance to less hazardous levels whenever the full beam power is not required. 7. Assure that the laser device has a keyswitch master interlock to permit only authorized personnel to operate the laser. 8. Install appropriate signs and labels on entrances, switches and anywhere an unauthorized person might mistakenly activate the laser. 9. Remember that optical pump systems may be hazardous to view and that once optical pumping systems for pulsed lasers are charged, they can spontaneously discharged, causing the laser to fire unexpectedly. dark, absorbing dif。