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Eye instead of display

19.01.2000

Employees of the Human Interface Technology Laboratory (HIT lab.) at the University of Washington have proposed a fundamentally new way to obtain an image directly on the retina by scanning a laser beam. The aim of the work was to obtain a full-color, bright, high quality three-dimensional image.

Several models of such a device, called the Virtual Retinal Display (VRD), have already been manufactured - a virtual eye display. This is a very light, small and comfortable design, reminiscent of glasses. It has a field of view of more than 120 degrees, a resolution of about an arc second (almost the same as that of the eye) and much better color reproduction than standard monitors.

The image is voluminous and very realistic: the deflector has two projection systems, separately for the left and right eyes, forming a stereo pair. And high brightness allows you to work with the display in daylight, watching a computer picture over objects in the field of view. The design uses three miniature semiconductor lasers with a power of about 7 μW, safe for the eyes, emitting red, green and blue colors. The system (deflector) that scans their beams makes it possible to obtain both graphic and raster images with a standard frequency of 60 Hz (as in conventional computer monitors and televisions).

The device provides horizontal and vertical scanning with a large deflection angle and fits in a miniature box. The new device can be useful for surgeons, pilots and, in general, for all those whose work directly depends on the speed and accuracy of perception of visual information.

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