Phase Modulating LCOS Microdisplays for Holographic Projection

HOLOEYE developed a special high resolution LCOS microdisplay optimized for pure phase only modulation. A high resolution phase modulating liquid crystal microdisplay coupled with a laser source produces a very light efficient holographic projection system. At conventional projection systems an image is addressed at the microdisplay and the amplitude of the incoming light is modulated (light is blocked). With LCOS phase displays a diffractive structure can be addressed at the display and only the phase of the incoming light is modulated (light is redirected). Due to that a very high light efficiency can be acieved. With holographic projection it is possible to reduce the overall size of a projection system to enable use in applications where space for a projector is limited, e.g. HUDs. It is possible to reduce the numer of additional optics needed in the projection system simply by adressing lens functions on the display.

HEO 1080 P – Phase Modulator Developer Kits

HOLOEYE offers developer kits based on the phase panels (HEO 1080 P). These pure phase modulators (<1% depolarisation) provide HDTV resolution (1920 x 1080 pixels) with 8 µm pixel pitch. Currently there are two panel versions available:

  • Optimized for 2π phase shift in the visible up to 800 nm having a broadband AR coating
  • Optimized for the near IR region showing a 2π phase shift up to 1064 nm with an AR coating for 1064 nm. This version also assures a high phase retardation at common telecommunication wavelengths (1550 nm).
  • The devices show a reflectivity of approx. 60% and diffraction efficiencies of more than 80%. Thereby a total light efficiency of more than 50% per addressable diffractive device is possible. The driving of the device is very easy. A HDTV graphics card is sending HDTV resolution images to the device with a frame rate of 60 Hz. The HEO 1080 P is easily addressed as an external monitor.

    Main Features: Display Features: Special Optical Features:

    – LCOS Microdisplay (Reflective)
    – Resolution 1920 x 1080 Pixels
    – 60 Hz Image Frame Rate
    – Full Developers Kit (easy to run using a PC)
    – Microsoft Windows Driver Software
    – Application Software

    – Pixels: 1920 x 1080
    – Pixel Pitch: 8.0 µm
    – Depolarisation: <1%
    – Panel Size: 0,7”
    – Addressing: 8 Bit

    – Phase Only Modulation
    – 2 π Phase Shift up to 1064 nm
    – Extended Wavelength Range up to 1550

    The HEO 1080 P device is controlled by HOLOEYE driver software, which is delivered with the kit – that runs on all Windows platforms. This software allows of controlling all relevant image parameters and provides very easy gamma control to configure the modulator for different applications. The graphical user interface (GUI) is a comfortable tool to tailor the performance of the device to the desired result. Besides geometry and gamma corrections different sequences can also be addressed to the drive board. In addition, tailored SLM application software allows easy generation of diverse dynamic optical functions like gratings, lenses, axicons and apertures, as well as the calculation of diffractive optical elements (DOE) based on user defined images

    Possible Applications

    • Holographic Applications
    • Holographic Projection
    • Holographic HUDs
    • Optical Metrology / Interferometry
    • Laser Steering
    • Optical Networking Applications
    • Optical Tweezers

      all content © 2009 HOLOEYE Systems, Inc.