WAVE FRONT COMPENSATING APPARATUS, WAVE FRONT COMPENSATION METHOD, PROGRAM AND RECORDING MEDIUM

PROBLEM TO BE SOLVED: To provide a wave front compensation apparatus capable of precisely compensating wave front, to provide a wave front compensation method, and to provide a program and a recording medium. SOLUTION: A wave front modulating device 40 modulates the phase of incident light to form a...

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Bibliographic Details
Main Authors INOUE TAKU, KO KOKIN
Format Patent
LanguageEnglish
Published 20.10.2005
Edition7
Subjects
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
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Summary:PROBLEM TO BE SOLVED: To provide a wave front compensation apparatus capable of precisely compensating wave front, to provide a wave front compensation method, and to provide a program and a recording medium. SOLUTION: A wave front modulating device 40 modulates the phase of incident light to form a phase modulated light. A wave front detecting device 60 converts the phase modulated light into a multipoint spot image, photographs the multipoint spot image and sends out an image signal of the multipoint spot image to a control device 80. The control device 80 calculates the difference between the center of gravity of spots of the multipoint spot image and a reference center of gravity as a shift in the center of gravity and obtains a wave front equation, by applying a least square method to a relational equation between the shift of the center of gravity and a polynomial primary differential equation and calculating a polynomial weight coefficient. The control device 80 further calculates residual wave fronts for each control point, by substituting coordinates of respective controlling points for the wave front equation, obtains feedback control data and converts the feedback control data into a control signals by a look-up table. The control device 80 compensates a wave front 30 of the incident light and outputs an ideal wave front 70, by performing closed loop feedback of the control signals to the wave front modulating device 40. COPYRIGHT: (C)2006,JPO&NCIPI
Bibliography:Application Number: JP20040110303