Hokkaido University

Omron Corporation

Tokyo University of Agriculture and Technology

Kazuhiko Oka

Atsushi Taniguchi

Hiroshi Okabe

Kenichi Matoba

Yukitoshi Otani

Toshitaka Wakayama

Tomohiro Mizuno

In the channeled spectroscopic polarimetry, a measurement error of a parameter showing a spectropolarization characteristic of a sample is effectively removed, the error being generated by various variations in retardation of a retarder depending upon the state of the sample. With attention being focused that the retardation of the retarder may be kept constant by stabilization of an incident direction of light that transmits through the retarder, the retarder was arranged on the light source side with respect to the sample so as to effectively remove an influence relative to a measurement error, such as variations in direction of a light ray due to the sample.

Optical device having polarizer and non-active retarders for spectroscopic polarimetry

A measuring apparatus includes a light intensity information acquisition sectionthat acquires light intensity information relating to a measurement light containing a given band component, the measurement light having been modulated by optical elements included in an optical systemand a measurement target (or a sample), and a calculation sectionthat calculates at least one matrix element of a Mueller matrix that indicates the optical characteristics of the measurement target based on the light intensity information relating to the measurement light and a theoretical expression for the light intensity of the measurement light. The light intensity information acquisition sectionacquires the light intensity information relating to a plurality of the measurement lights obtained from the optical systemby changing setting of a principal axis direction of at least one of the optical elements. The calculation sectionperforms a carrier amplitude coefficient calculation process, and a matrix element calculation process that calculates the at least one matrix element based on a carrier amplitude coefficient and the theoretical expression for the carrier amplitude coefficient including the at least one matrix element.

Measuring apparatus, measuring method, and characteristic measurement unit

To effectively reduce a measurement error in a parameter indicating a state of spectroscopic polarization generated by variations in retardation of a retarder due to a temperature change or other factors, while holding a variety of properties of a channeled spectroscopic polarimeter. By noting that reference phase functions &#x3c6;(&#x3c3;) and &#x3c6;(&#x3c3;) are obtained by solving an equation from each vibration component contained in a channeled spectrum P(&#x3c3;), the reference phase functions &#x3c6;(&#x3c3;) and &#x3c6;(&#x3c3;) are calibrated concurrently with measurement of spectrometric Stokes parameters S(&#x3c3;), S(&#x3c3;), S(&#x3c3;), and S(&#x3c3;).

Spectroscopic polarimetry

To effectively reduce a measurement error in a parameter indicating two-dimensional spatial distribution of a state of polarization generated by variations in retardation of a birefringent prism pair due to a temperature change or other factors, while holding a variety of properties of an imaging polarimetry using the birefringent prism pair. By noting that reference phase functions &#x3c6;(x, y) and &#x3c6;(x, y) are obtained by solving an equation from each vibration component contained in an intensity distribution I(x, y), the reference phase functions &#x3c6;(x, y) and &#x3c6;(x, y) are calibrated concurrently with measurement of two-dimensional spatial distribution S(x, y), S(x, y), S(x, y), and S(x, y) of Stokes parameters.

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Sapporo, Japan

Kazuhiko Oka