Going beyond an improved colour gamut, an asymmetric colour contrast, which depends on the viewing direction, and its ability to readily deliver information could create opportunities for a wide range of applications, such as next-generation optical switches, colour displays, and security features in anti-counterfeiting devices. Here, we propose a simple Fabry–Perot etalon architecture capable of generating viewing-direction-sensitive colour contrasts and encrypting pre-inscribed information upon immersion in particular solvents (optical camouflage). Based on the experimental verification of the theoretical modelling, we have discovered a completely new and exotic optical phenomenon involving a tuneable colour switch for viewing-direction-dependent information delivery, which we define as asymmetric optical camouflage.

超越改进的色域，不对称的色彩对比度（取决于查看方向）及其易于传递信息的能力可能为广泛的应用（例如下一代光学开关，彩色显示器和安全功能）创造机会在防伪设备中。在这里，我们提出了一种简单的Fabry-Perot标准具架构，该架构能够生成对方向敏感的色彩对比，并在浸入特定溶剂（光学伪装）时对预先记录的信息进行加密。基于理论模型的实验验证，我们发现了一种全新的奇异光学现象，其中涉及可调谐颜色开关，用于与视线相关的信息传递，我们将其定义为非对称光学伪装。