CAJ | 학술논문

闪光参数准确与否对于视觉电生理检查结果有效性具有重要意义。针对视觉电生理闪光参数特点，建立了闪光测量系统等效电路模型，基于传递函数理论分析了闪光测量系统参数对闪光强度、时程和波形测量误差的影响，以氙灯和L ED为实验对象研究了系统参数在测量不同类型闪光时的误差。提出了减小测量误差以及消除测量闪光强度和L ED闪光时程理论误差的方法并进行了实验验证。采用所述方法在不同系统参数下测量L ED闪光强度结果的标准差为0．17％，L ED闪光时程结果标准差为0．07％，可认为基本不变，实验与理论分析结果吻合。
섬광삼수준학여부대우시각전생리검사결과유효성구유중요의의。침대시각전생리섬광삼수특점，건립료섬광측량계통등효전로모형，기우전체함수이론분석료섬광측량계통삼수대섬광강도、시정화파형측량오차적영향，이선등화L ED위실험대상연구료계통삼수재측량불동류형섬광시적오차。제출료감소측량오차이급소제측량섬광강도화L ED섬광시정이론오차적방법병진행료실험험증。채용소술방법재불동계통삼수하측량L ED섬광강도결과적표준차위0．17％，L ED섬광시정결과표준차위0．07％，가인위기본불변，실험여이론분석결과문합。
T he accuracy of flash parameters is critical to visual electrophysiological examination . An equivalent circuit model of the flash measurement system was established according to the characteristics of visual electrophysiological flashes .The influence of parameters of the flash measurement system on measurement error of flash waveform ,intensity and duration was ana‐lyzed theoretically and experimentally .Xeon lamp and LED flash sources were tested .Experi‐ments were carried out to investigate how measurement errors varied with parameters of the measurement system .The method for reducing the measurement errors respect to different ap‐plication requirements was proposed ,as well as the method to eliminate the theoretical errors when measuring the flash duration of LED and the flash intensity ,which were demonstrated by experiments .The intensity and duration of LED flash were measured at different system pa‐rameters by using the proposed methods .Results demonstrated that the standard deviation of the flash intensity is 0 .17% and that of the duration is 0 .07% ,w hich can be regarded as con‐stants ,showing good consistence with theoretical analysis .