Contact type digital image acquisition device

The invention relates to a contact type digital image acquisition device which solves the problem that a common paper money anti-fake detection device cannot be used for acquiring optically variable ink and hidden digital anti-fake information. The device comprises a shell, a protection glass plate is installed on an upper opening of the shell, a light transmission prism is installed at the inner bottom of the shell, two sets of light guiding rods are symmetrically arranged on the inner walls of the portions, on the two sides of the light transmission prism, of the shell, an LED lamp is installed at one end of each light guiding rod, the emergent light of the two sets of light guiding rods face towards the position, located over the light transmission prism, of the protection glass plate, focusing is formed in the protection glass plate, an image sensor array is arranged on the lower portion of the light transmission prism, a data processing module is arranged in the bottom of the shell, and the image sensor array is connected with the data processing module. The device has the advantages that a two-way four-column light guiding rod structure is adopted, and therefore the light guiding rods can be irradiated into a detection face at different illumination angles, and the color-change ink and hidden digital anti-fake information can be acquired.