Front end transparent observation window for explosion-proof thermal imaging camera

A front end transparent observation window for an explosion-proof thermal imaging camera comprises a front shield fixedly connected with the cylinder body of the camera; a metal coating cushion, second germanium glass, a third rubber pad, a metal mesh pore plate, a second rubber pad, first germanium glass, a first rubber pad, a metal washer and a glass clamping ring are sequentially mounted on the steps of an inner hole of the front shield from the inside out, wherein the glass clamping ring is in threaded connection with the inner hole of the front shield; the inner side of the glass clamping ring is caught on the metal washer; the metal washer is pressed on the first rubber pad; the first rubber pad presses on the first germanium glass; the first germanium glass presses the second rubber pad; the second rubber pad presses the metal mesh pore plate; the metal mesh pore plate presses the third rubber pad; the third rubber pad presses the second germanium glass; the second germanium glass presses the metal coa