Patent ID: 9581796
Date: 2017-02-28
CPC Classifications: G02B

Claim:
1. An imaging device comprising: a. a lens having a refractive index that varies according to a predetermined refractive index profile; b. a radiation source from which radiation waves are emitted or have been reflected; c. an outlet for decoupling waves from the device; d. a reflector which surrounds the lens, the source and the outlet in at least two dimensions; wherein the reflector and the refractive index profile of the lens are together arranged to direct said radiation waves transmitted in any of a plurality of directions from the source to the outlet along a closed trajectory; wherein, in the absence of the outlet, the radiation waves transmitted along the closed trajectory are directed back to the source by the lens and the reflector; wherein said radiation waves transmitted to the outlet comprise reflected light able to produce a desired image at said outlet; and wherein the outlet comprises an image detector, wave collector, or reflector.