Trouble with exporting file DXF covering: .DXF + .log + .png (Logo image,....)

Hi all,
I have a problems when i export file DXf. The export file cover: .DXF + .log + .png. If i delete this file image, i haven't 

seen it within Dxf file. Can i exporting each DXF file?

Please help me, thanks you very much!