The present invention provides a droplet ejection head having a liquid ejection energy driving device to eject a liquid from a nozzle, the droplet ejection head including: a nozzle plate provided with a nozzle to eject liquid droplets; a tetrahedral amorphous carbon film provided on the nozzle plate; and a water-repellent film provided on the tetrahedral amorphous carbon film. The resonator includes a resonator cavity, which, in one form of the invention, is formed by two parallel metal layers and a metallized wall structure extending between the metal layers. The beam-shaping module can also operate as a single lens using upper and lower projection lenses.