A Development of the Holographic Lighting 2019-01-0846
Automotive lighting perform a function to inform the position and behavior of the vehicle. It also represents a specific design identity of the vehicle or brand identity. Recently it implements the unique three-dimensional effect while using LED. However, a number of LEDs and complex form of the lens shape have to be applied, resulting in the size, weight and cost increase.
In this study, holographic technology is applied as another method to realize 3D effect. The hologram uses the coherence of light and records the interference fringe generated by the object beam reflected by the object and the reference beam on the hologram film. At the time of reconstructing, the film is irradiated with only the reference beam to realize a three-dimensional image. The optical system using a hologram was consists of hologram film, a light source and optical components (reflection surfaces) for irradiating the reference beam at an angle to the film.
When a hologram is used, a complicated shape image can be realized by forming a object using 3D printing or the like and then recording it on a film. Therefore, there is an advantage of increased freedom of image design and simplification of component parts. In addition, there is an advantage that the process time can be shortened in mass production by copying and using the holographic film after recording.
In this study, the following study was carried out to apply holographic technology to vehicles.
- Analysis of characteristics of reflection / transmission type and selection of optimal method for vehicle application
- Selection of the light source to satisfy image sharpness, color reproducibility and regulations
- The material and surface treatment of the object to improve sharpness and brightness
- Reconstructing condition to prevent hologram image distortion in lamp system.
Byoungsuk Ahn, Jinho Na, Kihong Lee, Jinho Jo