A boresight module, for co-aligning receiving detectors and a laser, comprising: a housing including an input window configured to receive electromagnetic radiation of a first wavelength from a laser, and an exit window configured to transmit the laser radiation to the receiving detectors; a corner cube coupled to the housing, a lateral transfer hollow, dichroic beam splitter, retro-reflector (LTHSR) assembly supported by the housing, the LTHSR assembly including a dichroic beam splitter, the dichroic beam splitter configured to receive the electromagnetic radiation from the laser and to reflect a portion of the electromagnetic radiation from the laser to the exit window and to transmit the remaining portion of the electromagnetic radiation from the laser to the corner cube; and a collimator including a collimator housing coupled to the housing and a target supported by the collimator housing, the collimator configured to focus electromagnetic radiation from the input window on to the target causing the target to emit electromagnetic radiation at multiple wavelengths in visible, mid, and long-wave bands as well as at the first wavelength through the exit window, wherein the corner cube is configured to direct the remaining portion of the electromagnetic radiation from the laser to the second side of the beam splitter, from which it is subsequently reflected off to the collimator; wherein the LTHSR assembly, the corner cube and the collimator are arranged such that the laser radiation transmitted to the receiving detectors through the exit window is parallel to the electromagnetic radiation from the laser received by the input window. a housing including an input window configured to receive electromagnetic radiation of a first wavelength from a laser, and an exit window configured to transmit the laser radiation to the receiving detectors; a corner cube coupled to the housing, a lateral transfer hollow, dichroic beam splitter, retro-reflector (LTHSR) assembly supported by the housing, the LTHSR assembly including a dichroic beam splitter, the dichroic beam splitter configured to receive the electromagnetic radiation from the laser and to reflect a portion of the electromagnetic radiation from the laser to the exit window and to transmit the remaining portion of the electromagnetic radiation from the laser to the corner cube; and a collimator including a collimator housing coupled to the housing and a target supported by the collimator housing, the collimator configured to focus electromagnetic radiation from the input window on to the target causing the target to emit electromagnetic radiation at multiple wavelengths in visible, mid, and long-wave bands as well as at the first wavelength through the exit window, wherein the corner cube is configured to direct the remaining portion of the electromagnetic radiation from the laser to the second side of the beam splitter, from which it is subsequently reflected off to the collimator; wherein the LTHSR assembly, the corner cube and the collimator are arranged such that the laser radiation transmitted to the receiving detectors through the exit window is parallel to the electromagnetic radiation from the laser received by the input window.