相关实验视频
Updated: Jan 10, 2026
09:03
Transpupillary Two-Photon In Vivo Imaging of the Mouse Retina
Published on: February 13, 2021
5.0K
在双光子视觉中,通过单波长刺激看到非光谱色彩
Linus Emmerich1,2, Pedro Gil3,4, Silvestre Manzanera3,4
1Institute for Ophthalmic Research, University of Tübingen, Tübingen, Germany.
Biomedical optics express
|November 26, 2025
概括
近红外激光器通过单光子 (1P) 和双光子 (2P) 吸收产生色彩感知. 这项研究表明,不同的激光功率和频率可以产生各种颜色的光谱,包括紫色,只使用一个波长.
科学领域:
- 光学和光子学 在光学和光子学.
- 人类的视觉感知 人类的视觉感知
- 激光物理 激光物理
背景情况:
- 脉冲近红外 (NIR) 激光器可以通过两光子 (2P) 吸收引起色彩感知,有效地将感知波长减半.
- 在高强度下,单光子 (1P) 吸收也有助于超出700nm的色彩感知.
- 1P和2P吸收之间的相互作用决定了NIR光谱中的整体色彩体验.
研究的目的:
- 为了研究1P和2P吸收在NIR频谱中的相互作用.
- 通过操纵激光参数来探索可生产的颜色范围.
- 了解激光功率和重复频率如何影响感知颜色.
主要方法:
- 用7个脉冲激光波长进行了颜色匹配实验,波长范围从730nm到920nm.
- 该研究使用了纳秒脉冲激光系统,调整功率和重复频率.
- 对每个实验条件的观察者颜色感知被系统地记录下来.
主要成果:
- 观察到的感知颜色的光谱,从较短波长的红色到较长波长的蓝色.
- 使用单个NIR波长成功生成了非光谱颜色,特别是紫色的色调.
- 在850nm和920nm之间检测到可修改的色调转移,对880nm和900nm之间的变化敏感度最高.
结论:
- 单个NIR波长可以刺激对紫色等非光谱颜色的感知.
- 激光功率和重复频率是调整NIR感知色调的关键参数.
- 这项研究扩大了对涉及多光子吸收过程的色彩视觉机制的理解.
相关概念视频
01:24Color Vision
1.3K
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
1.3K
01:22Photoreceptors and Visual Pathways
8.7K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
8.7K
01:24Vision
59.2K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
59.2K