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 coupled to said plate-like body , said at least one LED 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 ; <EOS>