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Optica Publishing Group
  • Journal of the Optical Society of Korea
  • Vol. 20,
  • Issue 4,
  • pp. 481-487
  • (2016)

Optical System Design for a Head-up Display Using Aberration Analysis of an Off-axis Two-mirror System

Open Access Open Access


This study presents a new optical system for a combiner-type head-up display (HUD) with a cylindrical lens as an asymmetrical aberration corrector, instead of a freeform mirror. In the initial design process based on off-axial aberration analysis, we obtain an off-axis two-mirror system corrected for linear astigmatism and spherical aberration by adding a conic secondary mirror to an off-axis paraboloidal mirror. Thus, since the starting optical system for an HUD is corrected for dominant aberrations, it enables us to balance the residual asymmetrical aberrations with a simple optical surface such as a cylinder, not a complex freeform surface. From this design process, an optical system for an HUD having good performance is finally obtained. The size of the virtual image is 10 inches at 2 meters away from a combiner, and the area of the eye box is 130×50 mm2.

© 2016 Optical Society of Korea

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