The invention relates to an X ray imaging apparatus (2) comprising: a source (4) for generating X ray radiation an object receiving space (6) for arranging an object of interest for X ray imaging an X ray collimator arrangement (8) arranged between the source (4) and the collimator arrangement (8) and an X ray mirror arrangement (10). The mirror arrangement (10) comprises for example two tapered mirrors (22) facing each other and adapted for guiding X ray radiation of the source (4) to the collimator arrangement (8). Consequently the X ray intensity at the object receiving space (6) is increased. In order to limit the X ray radiation to an area where the X ray radiation can be utilized form imaging an angle of spread m between the mirrors (22) and a length LM of each mirror (22) is adapted such that a number of total reflections of X ray radiation provided by the source (4) at the mirrors (22) is limited. The limitation provides the effect that an angle of reflection r of the totally reflected X ray radiation is limited. Consequently an X ray intensity at the object receiving space (6) is increased while constrains are provided which prevent a large increase of a width of the X ray radiation provided at the object receiving space (6) which effectively improves an imaging quality of an object of interest being arrangeable at the object receiving space (6).
