time+auto-focusing+technique+using+centroid+method+for+space+camera.doc

timeauto-focusingtechniqueusingcentroidmethodforspacecameratimeauto-focusingtechniqueusingcentroidmethodforspacecameraJournalofHarbinInstituteofTechnolo(NewSeries),,,2007Real-?timeauto-?focusingtechniqueusingcentroidmethodforspacecameraKUANGHai-pengl,LIZhao——-pei匡海鹏,李朝辉,刘明,刘刚,修吉宏,翟林培(,FineMechanicsandE—mail:kuanghp@;,ChineseAcademyofScience,Changchun130033,ChinaUniversityofAirForce,Changchun130022,China)Abstraet:Areal—timeauto—focusingsystemwithauto———focusingisthekeytechniquetoensurehighquali——collimationmethodofthecamerawhoseaxisisperpendiculartotheground,itisdesignedthattwosmallcaliberpentagonalprismsareplacedintheare—aofaDerturesuitabletothecamera'—collima—tion,—onalprismrefractinglightvertically,Dthroughthetwo——formsthedetectingoftheaxialdefoeusingquantitytothelandscapeorientationmeasurementofthefaeulae'——al—timeauto—focusingsystemusingeentroidmethodisreliableandthefocusingprecisioncanreach?::D:umber::AArtieleID:1005-9l13(2007)04-0577-03Todetectandverifypreciselythefocusisanim——tureandairpressure,theotheristhedifferencebe—tweenthecamera'smountingenvironmentanditsworkingenvironment,whichwillcausethechangesoftheopticaldistance,themirrorshape