Reduce blurring and distortion in a projection type virtual image display using integrated small optics

Tatsuya Hasegawa; Tomohiro Yendo

doi:10.1117/12.2183173

17 March 2015 Reduce blurring and distortion in a projection type virtual image display using integrated small optics

Tatsuya Hasegawa, Tomohiro Yendo

Proceedings Volume 9392, The Engineering Reality of Virtual Reality 2015; 93920P (2015) https://doi.org/10.1117/12.2183173
Event: SPIE/IS&T Electronic Imaging, 2015, San Francisco, California, United States

Abstract

Head Up Display (HUD) is being applied to automobile. HUD displays information as far virtual image on the windshield. Existing HUD usually displays planar information. If the image corresponding to scenery on the road like Augmented Reality (AR) is displayed on the HUD, driver can efficiently get the information. To actualize this, HUD covering large viewing field is needed. However existing HUD cannot cover large viewing field. Therefore we have proposed system consisting of projector and many small diameter convex lenses. However observed virtual image has blurring and distortion . In this paper, we propose two methods to reduce blurring and distortion of images. First, to reduce blurring of images, distance between each of screen and lens comprised in lens array is adjusted. We inferred from the more distant the lens from center of the array is more blurred that the cause of blurring is curvature of field of lens in the array. Second, to avoid distortion of images, each lens in the array is curved spherically. We inferred from the more distant the lens from center of the array is more distorted that the cause of distortion is incident angle of ray. We confirmed effectiveness of both methods.

Citation Download Citation

Tatsuya Hasegawa and Tomohiro Yendo "Reduce blurring and distortion in a projection type virtual image display using integrated small optics", Proc. SPIE 9392, The Engineering Reality of Virtual Reality 2015, 93920P (17 March 2015); https://doi.org/10.1117/12.2183173

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KEYWORDS

Distortion

Heads up displays

Projection systems

Image compression

Image display

Beam splitters

Cameras

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