Browsing by Author "Jackin, Boaz Jessie"

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Digitally designed holographic optical element for light field displays
(2018-08-01)
Jackin, Boaz Jessie
;
Jorissen, Lode
;
Oi, Ryutaro
;
Wu, Jui Yi
;
Wakunami, Koki
Concave micro-mirror arrays fabricated as holographic optical elements are used in projector-based light field displays due to their see-through characteristics. The optical axes of each micro-mirror in the array are usually made parallel to each other, which simplifies the fabrication, integral image rendering, and calibration process. However, this demands that the beam from the projector be collimated and made parallel to the optical axis of each elemental micro-mirror. This requires additional collimation optics, which puts serious limitations on the size of the display. In this Letter, we propose a solution to the above issue by introducing a new method to fabricate holographic concave micro-mirror array sheets and explain how they work in detail. 3D light field reconstructions of the size 20 cm x 10 cm and 6 cm in depth are achieved using a conventional projector without any collimation optics. (C) 2018 Optical Society of America
Three-dimensional reflection screens fabricated by holographic wavefront printer
(2018-06-01)
Oi, Ryutaro
;
Chou, Ping-Yen
;
Jackin, Boaz Jessie
;
Wakunami, Koki
;
Ichihashi, Yasuyuki
Several wavefront printers have been recently proposed. Since the printers can record an arbitrary computer-generated wavefront, they are expected to be useful for fabricating complex mirror arrays used in front projection 3-D screens without using real existing optics. We prototyped two transparent reflective screens using our hologram printer in experiments. These screens could compensate fora spherically distorted reference wave caused by a short projection distance to obtain an ideal reference wave. Owing to the use of the wavefront-printed screen, the 3-D display was simply composed of a normal 2-D projector and a screen without using extra optics. In our binocular system, reflected light rays converged to the left and right eyes of the observer and the crosstalk was less than 8%. In the light field system, the reflected light rays formed a spatially sampled light field and focused a virtual object in a depth range of +/- 30 mm with a +/- 13.5-deg viewing angle. By developing wavefront printing technology, a complex optics array may easily be printed by nonprofessionals for optics manufacturing. (C) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License.
Three-dimensional reflection screens fabricated by holographic wavefront printer (vol 57, 061605, 2018)
(2018-06-01)
Oi, Ryutaro
;
Chou, Ping-Yen
;
Jackin, Boaz Jessie
;
Wakunami, Koki
;
Ichihashi, Yasuyuki