1. An image forming apparatus comprising: a light source which irradiates an object with light and of which the orientation and position are fixed; a tilting mechanism which tilts the object at multiple tilt angles; an image sensor which is arranged at a position where the light that has been transmitted through the object is incident, gets tilted along with the object by the tilting mechanism, and captures a plurality of images at the multiple tilt angles; and an image processing section which forms a high-resolution image of the object, having a higher resolution than any of the plurality of images, by synthesizing the plurality of images together.