Saturation optics

The invention claims an image forming system comprising for receiving electromagnetic energy and according to the received electromagnetic energy to generate sample data the detector. This detector is composed of threshold value point characteristic so as to make the sample data in the following two states a: When the received electromagnetic energy intensity is less than threshold value point of the sample data is lower than the threshold value; Ii when the electromagnetic energy intensity is less than threshold value of the sample data point higher than the threshold value. The imaging system also comprises the invention claims a sampling data feature saturation of the optical element wherein the sample data is less than threshold value time the characteristic of different from the sample data is greater than the threshold value of characteristic.