Where the mechanical beam isolator is placed in the laser amplification circuit and the linear speed of the corresponding rotor depend on which part of the reflected laser it wants to block. Both the "megajoule" laser and the "national ignition device" laser have two spatial filters. For the convenience of discussion, the spatial filter near the target is called spatial filter 2 (SF2), and the other is spatial filter 1 (SF1). There is a small hole array plate at the focal point of the beam in the spatial filter. The four numbered holes on it correspond to the four-pass optical path, and the first hole corresponds to the first pass until the fourth hole corresponds to the fourth pass. The length of the optical path from SF2 to the target is relatively long. Their spatial filter SF2 is very short, respectively 22m and 15m The mechanical beam isolator stainless steel storage tank is set on the SF2 to block the reflected laser light on the target surface, which has great advantages. However, this small hole is large, with a diameter of 6mm, which requires a large linear velocity, which increases the material restrictions and technical requirements. Moreover, the reflection of the small hole 4 cannot be prevented here, and this hole is extremely susceptible to reflection. Considering the emission process of a large amount of energy, the energy of the drying ferrous sulfate laser is reduced by the small hole array plate, and the energy cut by the last hole is the most. Therefore, if the beam is not well collimated, a large amount of energy will be reflected back to the laser, enough to generate a plasma. Mechanical beam isolators cannot block light pulses just a few centimeters away from it so quickly. It is easier to block the target reflection at SF1, and the required linear velocity is only 870m / s. Part of the reason for the low speed requirement is that there is enough time to seal the small holes, but the main reason is that the caliber to be blocked here is smaller. If the rotor linear velocity is increased to about 2200 m / s, it seems feasible to block the reflected laser light generated at the last hole. The reflected laser energy generated at the target surface or the last hole is amplified by 4 times, but to meet the requirements of effectively isolating the target and the reflected laser light at the last hole, this location has to be selected. If the reflected laser is blocked when the light passes through the spatial filter in the third pass, although more time is allowed to achieve isolation, it is not practical, because the reflected laser will pass through the main amplifier twice, thereby obtaining a high energy gain. Battery Powered Mattress Air Pump Battery Powered Air Mattress Pump,Battery Operated Air Mattress,Battery Powered Air Mattress,Battery Operated Air Mattress Pump SHENZHEN SMARTNEWO TECHNOLOGY CO,. LTD , https://www.newopump.com