Deviation indicator with infrared imagery intended to be installed on board a carrier, such as a missile, and comprising: • an infrared matrix detector (2, 3), able to form a plurality of successive infrared images, • an optical aiming device, through which said infrared matrix detector (2, 3) is able to observe an approaching target, • an infrared laser able, by means of said optical aiming device, to emit infrared laser pulses in the direction of said target, the echoes of said infrared laser pulses, reflected by said target, being received by said infrared matrix detector (2, 3) through said optical aiming device, and • a control and processing device for controlling said infrared matrix detector (2, 3), for processing the infrared images formed on said infrared matrix detector, and for processing the images of said echoes, formed on said infrared matrix detector (2, 3), in order to determine the distance at which said target is situated, characterised: • in that said control and processing device associates with each of said infrared laser pulses emitted by said infrared laser a plurality of successive echo acquisition windows (Fl) by means of said infrared matrix detector (2, 3); and • in that the opening of the echo acquisition windows is effected, with respect to the emission of the corresponding infrared laser pulse, with a plurality of decreasing successive delays 2 D/c (c being the speed of light) corresponding to decreasing successive expected distances D between said deviation indicator and the target up to a predetermined low value (Di) as from which the control and processing device prepares the firing of the destructive weapon carried by said carrier. • an infrared matrix detector (2, 3), able to form a plurality of successive infrared images, • an optical aiming device, through which said infrared matrix detector (2, 3) is able to observe an approaching target, • an infrared laser able, by means of said optical aiming device, to emit infrared laser pulses in the direction of said target, the echoes of said infrared laser pulses, reflected by said target, being received by said infrared matrix detector (2, 3) through said optical aiming device, and • a control and processing device for controlling said infrared matrix detector (2, 3), for processing the infrared images formed on said infrared matrix detector, and for processing the images of said echoes, formed on said infrared matrix detector (2, 3), in order to determine the distance at which said target is situated, • in that said control and processing device associates with each of said infrared laser pulses emitted by said infrared laser a plurality of successive echo acquisition windows (Fl) by means of said infrared matrix detector (2, 3); and • in that the opening of the echo acquisition windows is effected, with respect to the emission of the corresponding infrared laser pulse, with a plurality of decreasing successive delays 2 D/c (c being the speed of light) corresponding to decreasing successive expected distances D between said deviation indicator and the target up to a predetermined low value (Di) as from which the control and processing device prepares the firing of the destructive weapon carried by said carrier.