A long-wavelength low F/# continuously zooming infrared optical system is introduced.Using zooming principle and optical design software,the optical system's structure and parameters are obtained.The relative aperture is variant during the zoom process,F/# is 0.85~1,zoom ratio is 4.5∶ 1,operating wavelength is 8~12 μm,and a 384×288 uncooled FPA detector is used.The system has high resolution,excellent images quality and smooth zoom locus.The design meets the requirements of the practical engineering.

Objective To summarize the application of percutaneous endoscopic gastrostomy(PEG) in 25 patients with cerebral apoplexy and consciousness obstacle for rehabilitation.Methods Under intravenous anesthesia and ECG monitoring,25 patients with cerebral apoplexy and consciousness obstacle at rehabilitation received PEG,the perioperative management was strengthened,especially on the observation and treatment of lung infection.Results The successful rate of PGE was 100%,operating time was(10±3) min on average;No operative death,bleeding,abdominal associated complications occurred,such as the abdomen inflammation,both preoperative and perioperative.Although 2 cases had cardiopulmonary complications reoccurred,after prompt treatment the symptoms were improved immediately.Patients were further followed up from 6 to 18 months,and postoperative lung infection was controlled effectively.Conclusion PEG is a safe operation for patients with cerebral apoplexy and consciousness obstacle at rehabilitation,which can help to control lung infection,but the strengthening of perioperative management is still needed.

By using traditional method,dual-galvanometric laser scanning manufacturing errors is reduced,but for farther precision improving,a new method,which use image processing is introduced.Through the second closed-loop error revision,the precision is better than 3 μm in the area of 10 mm×10 mm working face.

This paper introduces a precision temperature control system.It based on the high precision and small super adjusting to the temperature of the laser diode module,and based on the specialities of the C8051F-SCM.The fuzzy PID control algorithm can also be used to improve the efficiency.This tiny system can be placed in the head of the laser diode,when it is debugged or maintained,the power supply need not be dismantled,this system was proved to be convenient and stable.