| 摘要 |
PURPOSE: An automatic regulator of light exposure is provided to regularly keep the amount of illumination regardless of the amount of illumination of a target object by automatically regulating the opening/closing speed of a shutter according to the luminosity of a position of the target object. CONSTITUTION: Some of image signals output from a CCD(charge coupled device) sensor unit(20) are inputted in a video processor unit(50) through a switching unit and a condenser unit(30). The other image signals extract an iris signal of the image signal and the iris signal is passed through a comparator(70). A comparison detective signal output from the comparator is inputted in a timing pulse generation unit(80). The timing pulse generation unit regulates the amount of light coming from the CCD sensor unit based on the luminosity of a position of each target object. When the light is too bright, plenty of light is discharged by making the opening/closing degree of an iris shutter fast. When the light is too dark, it is maximally brightened by making the opening/closing degree of an iris shutter slow. |
