Abstract: An optical system may comprise an emitter assembly and an optical structure that are configured to be used with a lighting device for providing a narrow beam angle for the lighting device. The emitter assembly may comprise an array of emitters configured to emit light. The optical structure may comprise a body having a light-entry portion, a light-exit portion, and side wall extending between the light-entry portion and the light-exit portion. The side wall of the optical structure may define a total internal reflection (TIR) surface. The light-exit portion may comprise a front surface and an octagon-shaped well formed into the front surface. The octagon-shaped well may have a center surface surrounded by a beveled portion configured to refract light that is reflected off of the TIR surface towards a central axis of the optical system, such that light rays that are transmitted from the light-exit portion are substantially collimated.

Abstract: A method for providing an optical element may include providing an optical feature in the optical element that spreads or distributes light passing through the optical element. The method may also include providing a texturing in at least a portion of the optical feature of the optical element.

Abstract: A method for providing an optical element may include providing an optical feature in the optical element that spreads or distributes light passing through the optical element. The method may also include providing a texturing in at least a portion of the optical feature of the optical element.