High Quality Assembly of Phase-Only Liquid Crystal on Silicon (LCOS) Devices

Author

Zhang, Zichen ; Jeziorska-Chapman, Anna M. ; Collings, Neil ; Pivnenko, Mike ; Moore, John ; Crossland, Bill ; Chu, Daping P. ; Milne, Bill

Author_Institution

Dept. of Eng., Univ. of Cambridge, Cambridge, UK

Volume

7

Issue

3

fYear

2011

fDate

3/1/2011 12:00:00 AM

Firstpage

120

Lastpage

126

Abstract

Liquid crystal on silicon (LCOS) for phase-only holography is ideally made to better optical tolerance than that for conventional amplitude modulating applications. Die-level assembly is suited to custom devices and pre-production prototypes because of its flexibility and efficiency in conserving the silicon backplane. Combined with automated assembly, it will allow high reproducibility and fast turnaround time, paving the way for pre-production testing and customer sampling before mass production. Pre-assembly optical testing is the key element in the process. By taking into account the flatness of both the backplane and the front glass plate, we have assembled high quality LCOS devices. We have reached our aim of less than one quarter wavelength phase distortion across the active area.

Keywords

amplitude modulation; holographic displays; liquid crystal displays; liquid crystal on silicon; optical modulation; amplitude modulating application; custom device; customer sampling; die-level assembly; fast turnaround time; front glass plate; high quality LCOS devices; high quality assembly; mass production; optical tolerance; phase-only holography; phase-only liquid crystal on silicon device; preassembly optical testing; preproduction prototype; preproduction testing; quarter wavelength phase distortion; Liquid-crystal (LC) devices; modulators; phase modulation;

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2010.2051318

Filename

5570881