| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a photographic optical system advantageous for thinning design of a photographic device while preventing occurence of unnecessary light by a prism directly antecedent to an imaging chip. <P>SOLUTION: A photographic optical system 100 includes: an imaging lens group 106 that has at least one lens; an image side prism 108 that includes an incident surface 108c which light transmitted through the imaging lens group enters, a reflection surface 108a that reflects the light entering through the incident surface, and an emission surface 108b that emits the light reflected by the reflection surface toward an image pickup element arranged at a predetermined position; and a first shielding member 120 that shields at least a part of a region on the incident surface from a ridge line of an apex angle formed by the incident surface and the emission surface to a height h satisfying a predetermined condition. <P>COPYRIGHT: (C)2012,JPO&INPIT |
