Anti-counterfeiting element, preparation method thereof, authenticity detection method and detection device

The invention provides an anti-counterfeiting element and a preparation method, a detection method and a detection device thereof. The anti-counterfeiting element comprises a base material; the photosensitive information layer is arranged on the lower surface of the base material and can present photosensitive information under the irradiation of the polarized light; the groove layer is arranged on the lower surface of the photosensitive information layer, a micro groove is formed in the groove layer, the micro groove is filled with a fluorescent material, and the fluorescent material can present fluorescent information under the irradiation of fluorescent light; wherein the photosensitive information and the fluorescent information are used as anti-counterfeiting information to distinguish the authenticity of the anti-counterfeiting element. 本申请提供了一种防伪元件及其制备方法、检测方法和检测装置，防伪元件包括：基材；感光信息层，设置在基材的下表面，能够在偏振光的照射下呈现感光信息；沟槽层，设置在感光信息层的下表面，沟槽层上设置有微沟槽，微沟槽内填充有荧光材料，荧光材料能够在荧光的照射下呈现荧光信息；其中，感光信息和荧光信息作为防伪信息，以辨别防伪元件的真伪。