SPATIAL LIGHT MODULATION DEVICE AND SPATIAL LIGHT MODULATION METHOD

PROBLEM TO BE SOLVED: To optionally modulate a complex amplitude of light only by using one spatial light modulation device and increase the use efficiency of light, and record and reproduce optical information of high resolution.SOLUTION: A spatial light modulation device includes a phase applicati...

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1. Verfasser:	IBARADA DAISUKE
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Zusammenfassung:	PROBLEM TO BE SOLVED: To optionally modulate a complex amplitude of light only by using one spatial light modulation device and increase the use efficiency of light, and record and reproduce optical information of high resolution.SOLUTION: A spatial light modulation device includes a phase application part for applying multiple fixed phases to incident light, and a light modulation part for modulating an absolute value or declination of a complex value where a phase value assigned to individual pixels becomes the declination. Individual pixel groups existing in a fixed range of multiple individual pixels 21 are simulated as one pixel, and thereby one virtual pixel 30 is structured. The sum of the complex value of each pixel 21 constituting the individual pixel groups is simulated as a complex amplitude modulation rate of the virtual pixel. Also, a spatial light modulation method using this spatial light modulation device is provided for solving a problem.SELECTED DRAWING: Figure 2 【課題】１つの空間光変調装置を用いるだけで、光の複素振幅を任意に変調すると共に、光の利用効率を高め、且つ、解像度の高い光情報を記録し、再生する。【解決手段】入力光に複数の固定位相を付与する位相付与部と、個別画素に割り当てられた位相値が偏角となる複素数値の絶対値または偏角を変調する光変調部と、を備え、複数の個別画素２１の一定範囲に存在する個別画素群を１画素として擬制することによって１つの仮想画素３０が構成され、個別画素群を構成する各個別画素２１の複素数値の和を前記仮想画素の複素振幅変調率と擬制する空間光変調装置及びこの空間光変調装置を用いた空間光変調方法で解決する。【選択図】図２