Monolithic microspectrometer using tunable ferroelectric liquid crystals

A vertically aligned deformed helix ferroelectric liquid crystal is used to fabricate a thermally controllable monolithic microspectrometer using a single liquid crystal cell and a photodiode. The device has an active range over the entire visible spectrum from ∼400–720nm achieving an optimal resolution of 12nm in short wavelength regime to 20–25nm in the long wavelength regime. Operation is demonstrated through spectral reconstruction of the mercury emission spectra and a broadband white light emitting diode using a commercial spectrometer and the liquid crystal based spectrometer.

[1]  S Nioka,et al.  NIR Spectroscopic Detection of Breast Cancer , 2005, Technology in cancer research & treatment.

[2]  Haiqing Xianyu,et al.  In-plane switching of cholesteric liquid crystals for visible and near-infrared applications. , 2004, Applied optics.

[3]  Toralf Scharf,et al.  Compact liquid-crystal-polymer Fourier-transform spectrometer. , 2004, Applied Optics.

[4]  Byoungho Lee,et al.  A Rotatable Waveplate Using a Vertically Aligned Deformed-Helix Ferroelectric Liquid Crystal , 2004 .

[5]  John Alderman,et al.  Development of a micro-spectrometer system for process control application , 2002 .

[6]  Masanori Ozaki,et al.  Mirrorless Lasing in a Dye‐Doped Ferroelectric Liquid Crystal , 2002 .

[7]  Gerhard Lammel,et al.  Microspectrometer based on a tunable optical filter of porous silicon , 2001 .

[8]  Dietmar Sander,et al.  Selffocussing phase transmission grating for an integrated optical microspectrometer , 2001 .

[9]  José Higino Correia,et al.  Single-chip CMOS optical microspectrometer , 2000 .

[10]  Louis D. Silverstein,et al.  49.3: H‐PDLC Color Separation Device for Image Capture Systems , 2000 .

[11]  Munekazu Date,et al.  A memory-type holographic polymer dispersed liquid crystal (HPDLC) reflective display device , 1998 .

[12]  W. Crossland,et al.  Deformed Helix Ferroelectric Liquid Crystal Fabry Perot etalons , 1997 .

[13]  Yang-Ming Zhu,et al.  BISTABLE CHOLESTERIC REFLECTIVE DISPLAYS:Materials and Drive Schemes , 1997 .

[14]  P. Hariharan.  Types of holograms , 1996 .

[15]  John W. McMurdy,et al.  Diffuse reflectance spectra of the palpebral conjunctiva and its utility as a noninvasive indicator of total hemoglobin. , 2006, Journal of biomedical optics.

[16]  B H Woodcock,et al.  Optical Holography: Principles, Techniques and Applications , 1987 .