| 摘要 |
<p>PURPOSE:To precisely read out ciphers without informing the ciphers to an disinterested person and to obtain many information from one pattern of ciphers by utilizing temperature extinction of a phospher to record the ciphers. CONSTITUTION:Ultraviolet rays UB is irradiated from a luminous body 3 to an object 2. Fluorescence LU emitted from the phospher 1 as the result of the excitation due to the ultraviolet rays UB is detected by a photodetector 4. A filter 5 to interrupt the exciting light UB and penetrate only the fluorescence LU is arranged in front of the photodetector 4. When the phospher 1 has plural luminous peak wavelength, fluorescence other than the required one is interrupted by the filter 5. A heater block 6 to heat the object up to a prescribed temperature is arranged on the reading position of the ciphers.</p> |
