| 摘要 |
PURPOSE:To perform the laser engraving in shading and variable density by measuring the illumination intensity from the body to be scanned by an optical sensor, taking off an analog detection signal as well and controlling the irradiation output of a laser beam based on this signal output. CONSTITUTION:The body 1 to be scanned expressed by shading and variable density of a photograph original, etc., is fitted to the upper face of an X/Y table 2 and an optical sensor 3 is arranged at the upper part thereof. The mate rial 4 to be worked of a lumber, etc., is arranged on the same table and a laser head 6 on the upper part. The sensor 3 is composed of a photodiode, inputting the incident light emitted from the microspot of the surface of the body 1 to be scanned and outputting the detection signal corresponding to the shading and variable density to an oscillating output control circuit 9 via an amplifier circuit 7. The irradiation output of a laser beam 10 is thus controlled and the laser engraving corresponding to the shading and variable density of the body 1 to be scanned is executed on the material 4 to be worked. |
