Rabin J
Sensory Research Division, U.S. Army Aeromedical Research Laboratory, Fort Rucker, AL 36362-0577.
Aviat Space Environ Med. 1993 Aug;64(8):706-10.
Visual acuity is often used to assess vision through image intensifying devices such as night vision goggles (NVG's). Fewer attempts have been made to measure contrast sensitivity through NVG's. Such information would be useful to better understand contrast processing through NVG's under various stimulus conditions. In this study, computer-generated letter charts were used to measure contrast sensitivity through third generation NVG's for a range of letter sizes. The red phosphor of a standard color monitor proved to be an effective stimulus for third generation devices. Different night sky conditions were simulated over a 3 log unit range. The results illustrate the profile of contrast sensitivity through third generation NVG's over a range of night sky conditions. Comparison of measurements through NVG's to measurements obtained without the device but at the same luminance and color distinguish between effects of luminance and noise on contrast sensitivity.
视力通常通过图像增强设备（如夜视镜，NVG）来评估视觉。通过NVG测量对比敏感度的尝试较少。此类信息对于更好地理解在各种刺激条件下通过NVG进行的对比度处理很有用。在本研究中，使用计算机生成的字母图表通过第三代NVG测量一系列字母大小的对比敏感度。标准彩色显示器的红色磷光体被证明是第三代设备的有效刺激源。在3个对数单位范围内模拟了不同的夜空条件。结果说明了在一系列夜空条件下通过第三代NVG的对比敏感度情况。将通过NVG的测量结果与在相同亮度和颜色下不使用该设备获得的测量结果进行比较，以区分亮度和噪声对对比敏感度的影响。
