Laser HELLFIRE seeker head
U.S. Army
<a rel="nofollow" class="external text" href="https://babel.hathitrust.org/cgi/imgsrv/download/pdf?id=uiug.30112032009562;orient=0;size=100;seq=226;num=214;attachment=0">U. S. Army Weapon Systems 1998</a>, Page 214