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在红外两光子视觉中的斯泰尔斯-克劳福德效应

Xinyu Wang¹, Silvestre Manzanera^1,2, Juan Tabernero^1,2

¹Laboratorio de Óptica, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain.

Biomedical optics express

|January 14, 2026

概括

影响感知亮度的斯泰尔斯-克劳福德效应被用双光子 (2P) 视觉对可见光和红外光进行了比较. 结果表明这两种光类型的光感应器方向性相似,表明可比的视觉处理.

科学领域:

视觉科学视觉科学视觉科学
光物理学的光学物理学
生物物理学的生物物理.

背景情况:

脉冲红外 (IR) 光可以通过非线性两光子 (2P) 吸收通过视觉感知.
第一种斯泰尔斯-克劳福德效应 (SCE-I) 描述了感知亮度如何随着瞳孔进入光线点的变化而变化.
对于可见光来说,SCE-I已经很成熟,但对于2P视觉来说不太了解.

研究的目的:

为了比较Stiles-Crawford效应 (SCE-I) 的强度,可见光与通过2P吸收感知到的脉冲红外光相比.
为了研究光受体的方向性是否在传统的1光子和2P激发路径之间有所不同.

主要方法:

招募了11名参与者来评估可见光和红外光刺激的视觉感知.
通过分析基于光线进入瞳孔的位置感知到的亮度变化来测量Stiles-Crawford效应.
量化了可见光和红外光条件的特征方向性参数.

主要成果:

红外光的平均方向性参数为0.080±0.049mm−2.2.
可见光的平均方向性参数为0.059 ± 0.016 mm−2.2.
红外线和可见光之间的平均差异为0.021 ± 0.039 mm−2 (p=0.11),表明没有统计学上显著的差异.

结论:

光感受器的方向性反应在常规的一光子 (可见光) 和两光子 (红外光) 激发时似乎都类似.
通过2P吸收感知到的可见光和红外光之间的Stiles-Crawford效应强度是可比的.
这些发现支持统一视觉处理机制的概念,无论激发途径如何.

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