| 摘要 |
An apparatus and method are provided for recording information on documents by means of pulsed radiation. In one form, a record member such as a sheet of paper, plastic, paper board or other suitable material is intersected by pulses of intense light energy generated by a laser. The pulsed energy is of sufficient intensity to either burn holes completely through the sheet material, form cavities therein or to burn and discolor the sheet material or a film applied thereto. The sheet and radiation are relatively moved in such a manner as to form spots or holes in the sheet material which spots or holes have the contour configurations of a plurality of characters such as numbers or letters which may be visually discerned and read as words and/or numerical information just as if the characters were to be printed on the sheet. In a particular form, character defining arrays of holes burned through the sheet are utilized to permit the passage of printing ink therethrough and the sheet may be used as a stencil for making multiple copies of printed information. The beam generated by the laser may be deflection controlled along two axes at its source permitting the beam to ascribe not only the contour of each character but a plurality of characters and a plurality of lines thereof. In a specific form, a plurality of sheets of recording material may be disposed, one behind another, and the radiation may be sufficient to pass through each of the sheets to form a plurality of copies containing holes arrayed in each copy to define similar character configurations across each each sheet.
|
