Optical scanning device with beam compression and expansion

An optical scanning device, comprising:

• a first beam scanner section configured to receive an input light beam and to produce a first scanning pattern including a circular or an oval scanning beam section;
• and
• a second beam scanner section positioned to receive light from the first beam scanner section and to produce an output beam having a second scanning pattern, wherein the second scanning pattern includes at least one flat or straight boundary.

An optical scanning device, comprising:

• a first beam scanner section including a first prism and a second prism, the first and the second prisms configured to rotate in opposite directions with respect to each other, the first prism having a first rotation speed and the second prism having a second rotation speed;
• and
• a second beam scanner section positioned to receive light from the first beam scanner section, the second beam scanning section including a third and a fourth prism, wherein the third and the fourth prisms are configured to rotate in opposite directions with respect to each other, the third prism having a third rotation speed and the fourth prism having a fourth rotation speed, wherein the first, the second, the third and the fourth rotation speeds are selectable to produce an output beam having a particular scanning pattern.