META-LENS, OPTICAL SYSTEM, IMAGE PROJECTION DEVICE, LIGHT SOURCE DEVICE, IMAGING DEVICE, OPTICAL SCANNING DEVICE, AND MEDICAL IMAGE PROJECTION DEVICE

原文（中文）

Provided is a meta-lens that reduces influence of 0th order light by guiding 1st order light for obtaining a signal to a position outside a light path of the 0th order light when constructing an optical system using the meta-lens. The meta-lens according to the present invention is a meta-lens that has a light transmission surface on which a plurality of fine structures are consecutively provided and adjusts a refractive index for light on the basis of a density of the fine structures, and includes a light path separator that causes 1st order light and 0th order light of light that has passed through the transmission surface to travel along different light paths, the 1st order light being light that has been influenced by refraction caused by the fine structures, and the 0th order light being light that has not been influenced by refraction caused by the fine structures.