Split lens video display system

Details Split lens video display system Split lens video display system

1996-03-01

1998-04-21

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359210, 359213, 359215, 359900, G02B 2608

Patent

active

057424217

ABSTRACT:
A miniature visual display has an optical lens system with at least two separated lens elements positioned to admit a scanning mirror between them. The scanning mirror is driven with an oscillatory motion causing an image of a light source which is reflected in the mirror to appear to sweep across the field of view of an observer looking into the system. The light source is typically a linear array of light-emitting diodes, and the diodes are controlled to emit light flashes in synchronism with the scanning mirror oscillation frequency to generate a virtual raster image. The two lens elements are selected and arranged so that the magnification power of the system is split between the lenses. A viewer looking into the system sees a virtual image apparently positioned at a comfortable viewing distance which is in uniform focus over the entire viewing area.

REFERENCES:
patent: 4897715 (1990-01-01), Beamon III
patent: 4934773 (1990-06-01), Becker
patent: 5023905 (1991-06-01), Wells et al.
patent: 5155615 (1992-10-01), Tagawa
patent: 5325386 (1994-06-01), Jewell et al.

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