Abstract: In an image recording apparatus using an image recording medium which generates a gas when irradiated with a light beam, the gas and the like are prevented from drifting into a space between the image recording medium and a drum, and thus contamination of the back surface of the image recording medium is prevented. The gas is effectively prevented from drifting to the back surface of a plate P by setting a relative positional relationship of an extending direction of each suction groove L, an attaching position of the plate P, and an air blowing direction so that unclosed regions, not closed by the plate P, of suction grooves L formed in a drum surface do not occur downstream in a gas moving direction.

Abstract: An image recording apparatus according to this invention includes a frequency divider 22 for generating a reference signal of a frequency higher than that of a dot clock signal, a pulse exposure control circuit 31 for causing a laser beam emitted from a laser diode 27 to irradiate a recording medium when both an image signal and the reference signal are ON, and a switching device 25 for switching between a first recording mode for causing the laser beam emitted from the laser diode 27 to irradiate the recording medium when the image signal is ON, and a second recording mode for causing the laser beam emitted from the laser diode 27 to irradiate the recording medium when both the image signal and reference signal are ON.

Abstract: In an image recording apparatus using an image recording medium which generates a gas when irradiated with a light beam, the gas and the like are prevented from drifting into a space between the image recording medium and a drum and contaminating the back surface of the image recording medium. The gas is effectively prevented from drifting to the back surface of a plate P by setting a relative positional relationship of an extending direction of each suction groove L, an attaching position of the plate P and an air blowing direction so that unclosed regions, not closed by the plate P, of suction grooves L formed in a drum surface 31 do not occur downstream in a gas moving direction.

Abstract: An image recording apparatus according to this invention includes a frequency divider 22 for generating a reference signal of a frequency higher than that of a dot clock signal, a pulse exposure control circuit 31 for causing a laser beam emitted from a laser diode 27 to irradiate a recording medium when both an image signal and the reference signal are ON, and a switching device 25 for switching between a first recording mode for causing the laser beam emitted from the laser diode 27 to irradiate the recording medium when the image signal is ON, and a second recording mode for causing the laser beam emitted from the laser diode 27 to irradiate the recording medium when both the image signal and reference signal are ON.