Head-up display for vehicle

A head-up display for a vehicle, comprising:

• a single image generator configured to emit a first image light and a second image light;
• and
• a mirror unit including:
• a first mirror configured to reflect the first and second image lights toward a windshield of the vehicle,
• a second mirror separated from the first mirror and configured to transmit light linearly polarized in a first direction and reflect light linearly polarized in a second direction toward the first mirror, and
• a third mirror separated from the second mirror and configured to reflect the light linearly polarized in the first direction, which has transmitted through the second mirror, toward the first mirror,
• wherein a first optical path in which the first image light emitted from the single image generator is reflected by the second mirror toward the first mirror,
• wherein a second optical path in which the second image light passes through the second mirror, is reflected by the third mirror, and travels back to the second mirror,
• wherein the second image light, after traveling back to the second mirror, is reflected by the second mirror toward the first mirror,
• wherein a first virtual image formed by the first optical path is positioned closer to a driver of the vehicle, and
• wherein a second virtual image formed by the second optical path is positioned farther from a first region of the windshield and farther from the driver than the first virtual image.