Active liquid-crystal deflector and lens with Fresnel structure

Shibuya, Giichi; Yamano, Shohei; Yoshida, Hiroyuki; Ozaki, Masanori

doi:https://doi.org/10.1117/12.2261113

Active liquid-crystal deflector and lens with Fresnel structure

Shibuya, Giichi; Yamano, Shohei; Yoshida, Hiroyuki et al.

Proceedings of SPIE - The International Society for Optical Engineering, 2017, 10125, 101250V

アクセス数:647件（2025-10-18 00:32 集計）

固定URL: https://hdl.handle.net/11094/76957

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タイトル	Active liquid-crystal deflector and lens with Fresnel structure
著者	著者名 Shibuya, Giichi
	著者名 Yamano, Shohei
	NRID 1000080550045 1000080550045 researchmap permalink hiroyukiyoshida hiroyukiyoshida Scopus Author ID 55628543086 55628543086 著者名 Yoshida, Hiroyuki
	NRID 1000050204186 1000050204186 ORCID 0000-0002-9556-4225 0000-0002-9556-4225 researchmap permalink read0014092 read0014092 Scopus Author ID 55490143900 55490143900 著者名 Ozaki, Masanori
キーワード等	Liquid-Crystal devices
	Fresnel
	Electro-Optical devices
	deflector
	tunable
内容	SPIE OPTO, 2017, San Francisco, California, United States
内容	Giichi Shibuya, Shohei Yamano, Hiroyuki Yoshida, and Masanori Ozaki "Active liquid-crystal deflector and lens with Fresnel structure", Proc. SPIE 10125, Emerging Liquid Crystal Technologies XII, 101250V (15 February 2017). DOI: https://doi.org/10.1117/12.2261113
抄録	A new type of tunable Fresnel deflector and lens composed of liquid crystal was developed. Combined structure of multiple interdigitated electrodes and the high-resistivity (HR) layer implements the saw-tooth distribution of electrical potential with only the planar surfaces of the transparent substrates. According to the numerical calculation and design, experimental devices were manufactured with the liquid crystal (LC) material sealed into the sandwiched flat glass plates of 0.7 mm thickness with rubbed alignment layers set to an anti-parallel configuration. Fabricated beam deflector with no moving parts shows the maximum tilt angle of ±1.3 deg which can apply for optical image stabilizer (OIS) of micro camera. We also discussed and verified their lens characteristics to be extended more advanced applications. Transparent interdigitated electrodes were concentrically aligned on the lens aperture with the insulator gaps under their boundary area. The diameter of the lens aperture was 30 mm and the total number of Fresnel zone was 100. Phase retardation of the beam wavefront irradiated from the LC lens device can be evaluated by polarizing microscope images with a monochromatic filter. Radial positions of each observed fringe are plotted and fitted with 2nd degree polynomial approximation. The number of appeared fringes is over 600 in whole lens aperture area and the correlation coefficients of all approximations are over 0.993 that seems enough ideal optical wavefront. The obtained maximum lens powers from the approximations are about ±4 m-1 which was satisfied both convex and concave lens characteristics; and their practical use for the tunable lens grade eyeglasses became more prospective.
出版者	SPIE
収録物名	Proceedings of SPIE - The International Society for Optical Engineering
巻(号)	10125
ページ	101250V
刊行年月	2017-02-15
言語	英語
ハンドルURL	https://hdl.handle.net/11094/76957
PISSN	0277786X
NCID	AA10619755
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1117/12.2261113
アクセス権	open access
出版タイプ	Version of Record
カテゴリ	会議発表論文 Conference Paper

資源タイプ	会議発表論文
ローカル資源タイプ	会議発表論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Proceedings of SPIE - The International Society for Optical Engineering. 2017, 10125, p. 101250V
DC.title	Active liquid-crystal deflector and lens with Fresnel structure
DC.creator	Shibuya, Giichi
	Yamano, Shohei
	Yoshida, Hiroyuki
	Ozaki, Masanori
DC.publisher	SPIE
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2017-02-15
DC.identifier	https://doi.org/10.1117/12.2261113
DC.subject	Liquid-Crystal devices
	Fresnel
	Electro-Optical devices
	deflector
	tunable
DC.description	SPIE OPTO, 2017, San Francisco, California, United States
DC.description	Giichi Shibuya, Shohei Yamano, Hiroyuki Yoshida, and Masanori Ozaki "Active liquid-crystal deflector and lens with Fresnel structure", Proc. SPIE 10125, Emerging Liquid Crystal Technologies XII, 101250V (15 February 2017). DOI: https://doi.org/10.1117/12.2261113
DCTERMS.abstract	A new type of tunable Fresnel deflector and lens composed of liquid crystal was developed. Combined structure of multiple interdigitated electrodes and the high-resistivity (HR) layer implements the saw-tooth distribution of electrical potential with only the planar surfaces of the transparent substrates. According to the numerical calculation and design, experimental devices were manufactured with the liquid crystal (LC) material sealed into the sandwiched flat glass plates of 0.7 mm thickness with rubbed alignment layers set to an anti-parallel configuration. Fabricated beam deflector with no moving parts shows the maximum tilt angle of ±1.3 deg which can apply for optical image stabilizer (OIS) of micro camera. We also discussed and verified their lens characteristics to be extended more advanced applications. Transparent interdigitated electrodes were concentrically aligned on the lens aperture with the insulator gaps under their boundary area. The diameter of the lens aperture was 30 mm and the total number of Fresnel zone was 100. Phase retardation of the beam wavefront irradiated from the LC lens device can be evaluated by polarizing microscope images with a monochromatic filter. Radial positions of each observed fringe are plotted and fitted with 2nd degree polynomial approximation. The number of appeared fringes is over 600 in whole lens aperture area and the correlation coefficients of all approximations are over 0.993 that seems enough ideal optical wavefront. The obtained maximum lens powers from the approximations are about ±4 m-1 which was satisfied both convex and concave lens characteristics; and their practical use for the tunable lens grade eyeglasses became more prospective.
DC.format	76957
citation_title	Active liquid-crystal deflector and lens with Fresnel structure
citation_author	Shibuya, Giichi
	Yamano, Shohei
	Yoshida, Hiroyuki
	Ozaki, Masanori
citation_publisher	SPIE
citation_language	英語
citation_date	2017-02-15
citation_journal_title	Proceedings of SPIE - The International Society for Optical Engineering
citation_volume	10125
citation_firstpage	101250V
citation_doi	https://doi.org/10.1117/12.2261113
citation_public_url	https://hdl.handle.net/11094/76957

Active liquid-crystal deflector and lens with Fresnel structure

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