Abstract: The preheating effect on planer-window materials in direct driven experiments was studied with imaging velocity interferometer system for any reflector(VISAR). The transmitting process of shock wave in the transparent material has been analyzed. It is found that the first and second shocks transform in adhesive, and the third shock transforms in fused silica. From the experiment data, no disconnected stripe induced by the first and second shocks is observed due to the ionization caused by X-ray radiation. Because the transparent adhesive is bleached by the second laser pulse and the first half of the third, the recorded stripe is disconnected. The acceleration and deceleration processes of shock wave in fused silica has been observed. After we explained the shocktiming data, some con