一种新型超亮发光二极管刺激器：用于使发射光线性化和稳定化的光电二极管反馈设计。

A new superbright LED stimulator: photodiode-feedback design for linearizing and stabilizing emitted light.

作者信息

Watanabe T, Mori N, Nakamura F

机构信息

Department of Electrical Engineering, Tokyo University of Science, Faculty of Science and Technology, Chiba, Japan.

出版信息

Vision Res. 1992 May;32(5):953-61. doi: 10.1016/0042-6989(92)90038-k.

DOI:10.1016/0042-6989(92)90038-k

PMID:1604864

Abstract

A new, reliable LED photic generator is described for analog stimulus presentation in vision research. A "superbright" red-emitting diode is controlled via optical feedback using a PIN-photodiode. A Maxwellian-view stimulator developed this way has been proven capable of covering intensities of retinal illuminance of over 26,000 td with a linear dynamic range of 3.7 log units. The device also has outstanding properties in linearity (distortion less than 0.12% at 100 Hz), frequency characteristics (d.c. to 2 kHz full-modulation bandwidth), stability (0.0002% fluctuation), and noise (S/N ratio greater than 76 dB).

摘要

本文介绍了一种新型可靠的LED光发生器，用于视觉研究中的模拟刺激呈现。通过使用PIN光电二极管进行光反馈来控制“超亮”红色发光二极管。以这种方式开发的麦克斯韦观察刺激器已被证明能够覆盖超过26,000 td的视网膜照度强度，线性动态范围为3.7对数单位。该设备在线性度（100 Hz时失真小于0.12%）、频率特性（直流到2 kHz全调制带宽）、稳定性（0.0002%波动）和噪声（信噪比大于76 dB）方面也具有出色的性能。