眼动仪
仪器介绍
Tobii Pro Spectrum眼动仪配备多个红外光源和双摄像头，可以最高1200Hz的采样率准确捕捉眼睛的运动，数据采集过程对头部运动容忍度较高。软件可自动识别注视、眼跳等行为，并通过定义兴趣区、兴趣时间区间进行统计分析与数据可视化。此外，也可以与脑电图、近红外脑功能成像系统等设备联合使用，广泛应用于认知神经科学、阅读研究、人机交互等领域。
参数
| Mode | Human, great ape, monkey, small monkey |
| Sampling frequency | 1200, 600, 300, 150, 120 or 60 Hz |
| Precision | 0.01° RMS (Root mean square sample- to-sample deviation) at optimal conditions (Savitzky-Golay filtering applied), 0.06° RMS at optimal conditions (raw signal) |
| Accuracy | 0.3° at optimal conditions |
| Data sample output | Timestamp, gaze origin, gaze point, pupil diameter, etc. |
| Eye openness stream | has the same frequency as the gaze stream and will have the same timestamps. Eye openness data is provided in millimeters for each eye individually. |
| TTL input stream | 8–bit timestamped data (256 event codes). Event-driven detection with a timestamp accuracy of 50 µs. |
| Operating distance (mounted on screen) | 55 to 75 cm (22” and 30”) from the eye tracker |
| Set up options | (a) Screen and eye tracker mounted together (b) Standalone eye tracker (c) Tracker and screen mounted on any standard VESA mount (d) Eye tracker used with external monitor |