second lens unit to enter the diffusive reflector the size of a spot of the second light on the diffusive reflector is greater than the size of a spot of the first light on the fluorescent body layer application_number US 201615177670 A description hereinafter an embodiment of the invention will be described in detail with reference to the drawings moreover in order to facilitate understanding of features the drawings used in the following description may have enlarged portions becoming the features for the sake of convenience a dimensional ratio of each configuration element and the like are not limited to the same as those in actuality first an example of a projector 1 illustrated in fig1 will be described fig1 is a plan view illustrating a schematic configuration of the projector 1 the projector 1 of the embodiment is a projection type image display apparatus for displaying a color video image on a screen projection surface scr the projector 1 uses three optical modulation devices corresponding to each color light of red light lr green light lg and blue light lb the projector 1 uses a semiconductor laser laser light source as a light source of a lighting apparatus from which light of high luminance and high output is obtained specifically as illustrated in fig1 the projector 1 mainly includes a lighting apparatus 2 a a color separation optical system 3 an optical modulation device 4 r an optical modulation device 4 g an optical modulation device 4 b a synthesis optical system 5 and a projection optical system 6 the lighting apparatus 2 a.