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Proceedings Paper

Tunable liquid lens equipped virtual reality adapter for scientific, medical, and therapeutic goals
Author(s): Maris Ozolinsh; Janis Berzinsh; Anna Pastare; Paulis Paulins; Zane Jansone
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Paper Abstract

We adapted virtual reality appliances to use them in scientific medical diagnostics and therapeutic aims by incorporated as part of appliance ocular system two electrically tunable Optotune liquid lenses, controllable by computer USB ports within 20D range. In present time we used the appliance to investigate the mono- and/or binocularly illusory perception dominances (Shapiro and al;2008), nonlinearities caused by controversial Gestalt recognition of motion. Back layer of stimuli elements contained internal motion sources - clockwise spinning disk on neutral background. Disk consisted of centrosymmetric radial rays which luminance was sinus mode modulated along the disc circumference. Spinning speed was 0.15 rps. Spatial frequencies of modulation were within the range 1.8-3.7 cpd. Frontal stimuli layer contained concentrically allocated six circular apertures in neutral background rotating with the same speed however counterclockwise. Apertures lied concentrically with symmetry center collocated with the hidden center of internal motion. Observers made judgements (Tobserv=2sec) at different viewing eccentricity: 1) movement of disks seemed jumbled; spinning perceived continuous, however 2) counter- or 3) clockwise. Illusory perception – clockwise perception of movement sets on when viewing peripherally. Favorable conditions of that are equality of the frontal stimuli layer luminance to mean luminance of modulations, increasing contrast of modulations and increasing viewing eccentricity. Increasing of modulation spatial frequency diminishes illusion onset probability. Virtual reality appliances completed with tunable liquid lenses electrically controlling defocus allow to perform such experiments and to check patients with unilateral eye cataract.

Paper Details

Date Published: 7 November 2018
PDF: 7 pages
Proc. SPIE 10817, Optoelectronic Imaging and Multimedia Technology V, 1081704 (7 November 2018); doi: 10.1117/12.2500292
Show Author Affiliations
Maris Ozolinsh, Univ. of Latvia (Latvia)
Janis Berzinsh, Univ. of Latvia (Latvia)
Institute of Solid State Physics "Barona optika" (Latvia)
Anna Pastare, Univ. of Latvia (Latvia)
Paulis Paulins, Univ. of Latvia (Latvia)
Zane Jansone, Univ. of Latvia (Latvia)


Published in SPIE Proceedings Vol. 10817:
Optoelectronic Imaging and Multimedia Technology V
Qionghai Dai; Tsutomu Shimura, Editor(s)

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