Two Trees Photonics - Developing a real time full colour head up display (HUD) using highly efficient phase only holographic display technology

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Head up displays (HUDs) in cars and other vehicles are becoming increasingly common andhave been shown to significantly reduce accident rates by keeping the drivers eyes on theroads. Conventional automotive HUD projection systems are LCDs illuminated with white orcolour LEDs. These systems are limited in brightness, contrast, power usage, size and colourvariation. These systems are particularly ineffiecient in their usage of light, 1-2% opticallyefficient. The next generation requirements for automotive HUDs are very demandingespecially in terms of brightness, dimming range, supplied power and size. HolographicHUDs provide a variety of advantages in each of these areas. Two Trees Photonics havedemonstrated a very high quality HUD using its highly innovative and patented phase onlyholography with a truly analogue phase modulator. This approach is very efficient creatingHUD images with a brightness of 26,000Cd/m2 from low power silicon chip lasers but iscurrently limited to images that can be created using 2 colours (red and Green) and is onlyable to store a limited number of pre-computed holograms. To provide a step change in HUDdisplay capability and meet the requirements of the automotive OEMs the project aims tomove the technology to a full colour real time holographic display engine creating highlyefficient phase only holographic laser HUD. Two Trees Photonics has significant worldleading technical capability with holographic display and optical systems. The project willdevelop the components including the RGB laser light engine, the high speed driver enginefor phase modulation, the development of the real time computation engine and the phasemodulator driving engine to provide a full working prototype of the HUD system. The projectis intially focused on automotive but provides opportunities in aerospace, medical, rail,marine, near eye devies and augmented reality.