Off-axial HMD optical system consisting of aspherical surfaces without rotational symmetry

Hiroaki Hoshi; Naosato Taniguchi; Hideki Morishima; Takeshi Akiyama; Shouichi Yamazaki; Atsushi Okuyama

doi:10.1117/12.237443

10 April 1996 Off-axial HMD optical system consisting of aspherical surfaces without rotational symmetry

Hiroaki Hoshi, Naosato Taniguchi, Hideki Morishima, Takeshi Akiyama, Shouichi Yamazaki, Atsushi Okuyama

Proceedings Volume 2653, Stereoscopic Displays and Virtual Reality Systems III; (1996) https://doi.org/10.1117/12.237443
Event: Electronic Imaging: Science and Technology, 1996, San Jose, CA, United States

Abstract

An off-axial optical system is desirable for a see-through head mounted display (HMD) with a wide field of view (FOV). Using our new off-axial paraxial theory and the fabricating methods, we have achieved to correct the off-axial aberrations of the optical systems which consists of an aspherical surfaces without rotational symmetry. In this paper, we describe 3 types of off-axial HMD optical systems. (1) The first one is a hologram for a monochromatic HMD. The hologram has been recorded the wavefront generated by computer generated hologram. The image spot size is about 15 micrometers over 9 degree FOV. (2) The second one is an aspherical mirror system for a color HMD. The designed image spot size is less than 30 micrometers over 43.5 degree FOV. The shape error of the fabricated mirror is measured by a contact probing from 1.0 micrometers to 1.9 micrometers . The maximum resolution is 36 lp/mm. (3) The last one is a prism with aspherical surfaces, 34 degree FOV and less than 15 mm thickness. The monocular HMD with only 80 g weight has been developed. The line of sight detecting device has been applied as an interactive man-machine interface.

Citation Download Citation

Hiroaki Hoshi, Naosato Taniguchi, Hideki Morishima, Takeshi Akiyama, Shouichi Yamazaki, and Atsushi Okuyama "Off-axial HMD optical system consisting of aspherical surfaces without rotational symmetry", Proc. SPIE 2653, Stereoscopic Displays and Virtual Reality Systems III, (10 April 1996); https://doi.org/10.1117/12.237443

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