Patent ID: 8749463
Filing Date: 2014-06-10
Classification: G01M,G02F,G09G

Abstract:
1. A phase-modulating apparatus comprising: a spatial light modulator including a plurality of pixels arranged adjacent to one another two-dimensionally, each pixel being capable of phase-modulating input light in response to application of a drive voltage; an input value setting unit setting an input value for each pixel; a plurality of sets of reference data, each set of reference data corresponding to at least one pixel; a converting unit converting an input value inputted for each pixel to a control value by referencing the corresponding set of reference data; and a driving unit converting the control value to a voltage value, the driving unit driving each pixel with a drive voltage corresponding to the voltage value; each set of reference data correlating a plurality of first values from which input values are taken, and a plurality of second values from which control values are taken, the converting unit finding, among the plurality of second values, one second value that is correlated to one first value among the plurality of first values that is determined based on the input value inputted for each pixel, by referencing the reference data corresponding to the each pixel, and converting the input value to the control value by setting the control value to the found second value, each set of reference data correlating the plurality of first values and the plurality of second values to ensure that the relationship between the plurality of first values and phase modulations amounts attained by a pixel, of the at least one pixel to which each set of reference data corresponds when the converting unit sets the control values to the plurality of second values that are correlated to the plurality of first values, is a prescribed linear relationship.