FINGER PRINT CAMERA APPARATUS

摘要

PURPOSE: To obtain a finger print camera apparatus which enables photographing with no distortion in a finger print image along with a smaller and thin shape by a method wherein a finger is moved on a linear type photosensor array as an image pickup element to detect a luminance distribution with a unit width of an optical finger print image sequentially and a synthesization is performed on an image memory to obtain a two-dimensional image. CONSTITUTION: When an index finger is made to touch on a support plate 29 to be moved in the direction of the arrow 30, a rising line of a finger print comes into contact with an opposed contact surface and light enters into skin from an opposed transparent contact body 22 as a photoconducting plate to be turned to scattered light. The scattered light forms an image in the same size on a linear type photosensor array 26 by an erect imaging type lens array 25. On the other hand, a roller 27 and a rotary encoder 28 are combined to convert the moving of the finger to output a pulse signal 31 to an image control circuit 32 having an image memory 33 at each fixed moving value. The linear type photosensor array 26 is started as controlled by the image control circuit 32 to write luminance information into an image memory 33 sequentially.