Developing a novel electro-optic scanner for potential micro display and head-mounted display application

Wei-Chih Wang; Vinayak Ghorapade; Sudarshan Kalel; Benjamin Estroff; Chiali Chen; Yu Yang Hsu

doi:10.1117/12.2664900

18 April 2023 Developing a novel electro-optic scanner for potential micro display and head-mounted display application

Wei-Chih Wang, Vinayak Ghorapade, Sudarshan Kalel, Benjamin Estroff, Chiali Chen, Yu Yang Hsu

Proceedings Volume 12485, Nano-, Bio-, Info-Tech Sensors, and Wearable Systems 2023; 124850E (2023) https://doi.org/10.1117/12.2664900
Event: SPIE Smart Structures + Nondestructive Evaluation, 2023, Long Beach, California, United States

Abstract

Light beam deflectors and scanners have great potential in displays and microscopy for industrial and medical applications. A liquid crystal (LC) material that responds to external stimuli is a promising candidate for such applications. The goal of the proposed work is to create a miniature light scanning device without any moving parts using integrated electro-optic(EO) LC material. The design is based on changing the propagation direction of a light beam when it is incident to an electro-optic medium with a voltage-controlled index of refraction. The current design consists of two horizontal LC cell cascaded prisms (active Prism I and II) for horizontal beam deflection and a vertical prism (passive) at the end of the horizontal stage for vertical beam deflection. In the present work, a mathematical model and simulation study is conducted on the proposed design to achieve 2D deflection of the beam (λ=632 nm). The optimized prism or apex angle of active prisms I and II are 63 and 56.7 respectively, whereas the prism angle of the passive prism is 37.5. With an incident beam angle (θ1) of 9 at the entry of prism I, maximum horizontal deflection of >36 and maximum vertical deflection of >13 is achieved through theoretical and simulation study.

Conference Presentation

Citation Download Citation

Wei-Chih Wang, Vinayak Ghorapade, Sudarshan Kalel, Benjamin Estroff, Chiali Chen, and Yu Yang Hsu "Developing a novel electro-optic scanner for potential micro display and head-mounted display application", Proc. SPIE 12485, Nano-, Bio-, Info-Tech Sensors, and Wearable Systems 2023, 124850E (18 April 2023); https://doi.org/10.1117/12.2664900

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