Tolong jelaskan mengenai Ibnu al-Haitsam

| name = Hasan bin al-Haitsam(Alhazen)

|caption           = Alhazen (Ibnu Haitsam)

| birth_place = Bashrah, Buwaihiyah

| death_place = Qahirah, Fathimiyah

| influences = Aristoteles, Euklides, Ptolemaeus, Galenus, Muhammad bin Musa bin Syakir, Tsabit bin Qurrah, al-Kindi, Ibnu Sahl, Abu Sahl al-Quhi

| influenced = Umar Khayyam, Taqiyuddin Muhammad bin Ma'ruf, Kamaluddin al-Farisi, Ibnu Rusyd, al-Khazini, John Peckham, Witelo, Roger Bacon

| known_for = Book of Optics, Doubts Concerning Ptolemy, Alhazen's problem, Analysis, Catoptrics, Horopter, Moon illusion, experimental science, scientific methodology, visual perception, empirical theory of perception, Animal psychology