A lightguide structure for illumination, detection and/or holographic representation includes at least one planar lightguide for guiding electromagnetic radiation of at least a first spectrum, at least one illumination arrangement located on the first side face of the lightguide, and at least one holographic outcoupling structure for coupling out electromagnetic radiation guided in the lightguide structure. The light radiated in by the illumination arrangement can have a large angular range, the holographic outcoupling structure having a small angular range. Also provided is a production method for such a lightguide structure and to an operating element comprising a lightguide structure.

Computer-generated holographic display systems are described with improved image quality when used with illumination sources other than single mode lasers, such as broader emission light sources including LEDs and multi-mode lasers.

An example holographic display may comprise an angularly dispersive micromirror array and an optical assembly configured to emit, towards the micromirror array, a first ray of light having a first wavelength and a second ray of light having a second wavelength, the second wavelength being different to the first wavelength. The first ray of light is incident upon the micromirror array at a first angle of incidence and the second ray of light is incident upon the micromirror array at a second angle of incidence, the second angle of incidence being different to the first angle of incidence by a predetermined amount to at least partially compensate for the dispersive effects of the micromirror array along an optical axis of the holographic display.

A lightguide structure for illumination, detection and/or holographic representation includes at least one planar lightguide for guiding electromagnetic radiation of at least a first spectrum, at least one illumination arrangement located on the first side face of the lightguide, and at least one holographic outcoupling structure for coupling out electromagnetic radiation guided in the lightguide structure. The light radiated in by the illumination arrangement can have a large angular range, the holographic outcoupling structure having a small angular range. Also provided is a production method for such a lightguide structure and to an operating element comprising a lightguide structure.