Laser-scanning virtual image display

A method for projecting a virtual display image, the method comprising:

• biasing a first redirection optic to direct a narrow beam into a first dilation optic at a first entry angle;
• diffracting some of the narrow beam from the first dilation optic to form a one-dimensionally dilated beam;
• pivoting a second redirection optic to direct the one-dimensionally dilated beam from the first dilation optic into a second dilation optic at a second entry angle;
• diffracting some of the one-dimensionally dilated beam from the second dilation optic to form a two-dimensionally dilated beam;
• and
• modulating the narrow beam in synchronicity with the first and second entry angles so that the two-dimensionally dilated beam forms a virtual display image visible through the second dilation optic.

A head-mounted display device for displaying a virtual display image for view by a wearer, the device comprising:

• a laser configured to form a narrow beam;
• first and second dilation optics, each one having a diffraction grating, the first dilation optic arranged to receive the narrow beam and to project a one-dimensionally dilated beam into the second dilation optic, the second dilation optic arranged to receive the one-dimensionally dilated beam and to project a two-dimensionally dilated beam;
• first and second redirection optics, each one pivotally mounted and coupled to a transducer configured to pivot the optic, the first redirection optic arranged to direct the narrow beam into the first dilation optic at a first entry angle, the second redirection optic configured to direct the one-dimensionally dilated beam into the second dilation optic at a second entry angle;
• a controller configured to bias the transducers to vary the first and second entry angles by pivoting the first and second redirection optics, and further configured to modulate an intensity of the laser in synchronicity with the first and second entry angles such that the virtual display image is formed and made visible through the second dilation optic;
• and
• a wearable mount configured to position the second dilation optic a short distance in front of one eye of the wearer.