Design And Study Of Electronic Endocscope With The Field Of Front And Back

Given the disadvantages of current endoscopic rear view existing blind area,lead to difficulties in minimally invasive surgery,So,specific solutions of the minimally invasive surgery to patients,due to the rear vision blind area caused by injury problems,realize the purpose of reducing the risk of surgery,became has an important research content..Base on the analysis of its basic principle,through the optimization with ZEMAX,design a wavelength in the 0.486um~0.656 um.the focal focal length of 1.38 mm,F number is 2.4 electronic endoscope,the front view is 60 °,the rear view is 60 ° to 80 °.Use 1/10HX-0110HP33+CCD receive image,pixel size is 3.67 um.In the forefront of endoscope objective lens ring of the reflection film,Let the endoscope in front of the object imaging on the radius is 0.6 mm of CCD,the object of behind through the reflective of the reflective film imaging on the edge of CCD.Range between 0.6 mm to 0.8mm.The results show that:the modulation transfer function(MTF)value of this system is greater than 0.55 at the spatial frequency of 136lp/mm and in the front of view.which is 0.55 in the rear of view.The endoscope on the basis of the existing electronic endoscope,realized the requirements that can observe the view of rear.When the patient for minimally invasive surgery,Limit the unnecessary damage due to the view blind area of rear.