An apparatus for obtaining images of an element to be inspected, comprising: - a first optical unit, in turn comprising: - first image acquisition means facing a first side of said element and adapted to acquire at least one image of said first side; - first screening means interposed between said first acquisition means and said first side, and adapted to selectively screen said first acquisition means; - a second optical unit, in turn comprising: - second image acquisition means facing a second side, opposite to said first side of said element, and adapted to acquire at least one image of said second side; - second screening means interposed between said second acquisition means and said second side, and adapted to selectively screen said second acquisition means; - a control unit operatively connected to said first acquisition means and to said first screening means and operatively connected to said second acquisition means and to said second screening means; wherein said first optical unit and said second optical unit are aligned along a common optical axis; wherein said control unit activates said first acquisition means and said second screening means according to a first activation mode, and deactivates said first acquisition means and said second screening means according to a first deactivation mode; wherein said control unit activates said second acquisition means and said first screening means according to a second activation mode, and deactivates said second acquisition means and said first screening means according to a second deactivation mode; wherein said control unit controls said first activation mode, said first deactivation mode, said second activation mode and said second deactivation mode according to a predetermined sequence in order to obtain images of said first side and of said second side of said element, and characterized in that said first screening means and/or said second screening means comprise an optical device, in turn comprising a plate-like body provided with colorless and light-diffusing impurities, said impurities being adapted to change the optical path of an input light beam which crosses said plate-like body, said optical device further comprising at least one LED (120, 121, 122, 123) coupled to said plate-like body, said at least one LED (120, 121, 122, 123) generating said input light beam. - a first optical unit, in turn comprising: - first image acquisition means facing a first side of said element and adapted to acquire at least one image of said first side; - first screening means interposed between said first acquisition means and said first side, and adapted to selectively screen said first acquisition means; - first image acquisition means facing a first side of said element and adapted to acquire at least one image of said first side; - first screening means interposed between said first acquisition means and said first side, and adapted to selectively screen said first acquisition means; - a second optical unit, in turn comprising: - second image acquisition means facing a second side, opposite to said first side of said element, and adapted to acquire at least one image of said second side; - second screening means interposed between said second acquisition means and said second side, and adapted to selectively screen said second acquisition means; - second image acquisition means facing a second side, opposite to said first side of said element, and adapted to acquire at least one image of said second side; - second screening means interposed between said second acquisition means and said second side, and adapted to selectively screen said second acquisition means; - a control unit operatively connected to said first acquisition means and to said first screening means and operatively connected to said second acquisition means and to said second screening means;