AN INEXPENSIVE EYE-MOVEMENT MONITOR USING THE SCLERAL SEARCH COIL TECHNIQUE
AN INEXPENSIVE EYE-MOVEMENT MONITOR USING THE SCLERAL SEARCH COIL TECHNIQUE
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DOI：
10.1109/tbme.1984.325352
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发表时间：
1984-01-01
影响因子：
4.6
通讯作者：
REMMEL, RS
中科院分区：
文献类型：
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作者：
REMMEL, RS
为了使用巩膜搜索线圈方法经济地记录眼球运动，我们开发了一种使用普通元件的电路，成本仅为300美元。亥姆霍兹场线圈直径51厘米，间隔51厘米。水平和垂直磁场线圈分别由锁相方波以50和75 kHz的频率驱动；不需要调谐。放大后的眼圈信号以50 kHz和75 kHz的频率进行相位检测，分别产生水平和垂直的眼部位置信号。对于直径为2厘米的单圈眼圈，噪声为1.0分钟的均方根角。
For the economical recording of eye movements using the scleral search-coil method, we developed a circuit using common components and costing only $300. The Helmholtz field coils are 51 cm in diameter and are separated by 51 cm. The horizontal and vertical field coils are driven at 50 and 75 kHz, respectively, by phase-locked square waves; no tuning is required. After amplification, the eye-coil signal is phase detected at 50 and at 75 kHz to produce the horizontal and vertical eye-position signals, respectively. For a 2 cm diameter eye coil of one turn, the noise is 1.0 min of angle rms.