Abstract:
A polarization evaluation mask for evaluating the state of polarization of an illumination light in exposure equipment comprises a transparent substrate; a light interceptor formed in said transparent substrate and having a plurality of fine apertures; a plurality of polarizers formed to cover said plurality of fine apertures and having orientation angles of the transmissive polarization differing in increments of certain angle; and a plurality of quarter-wave plates arranged upstream of said illumination light than said polarizers and formed as superimposed on said polarizers to cover said fine apertures, and having orientation angles of the fast axis differing in increments of certain angle. Each of said plurality of fine apertures has a different combination of said orientation angle of said polarizer and said orientation angle of said quarter-wave plate.
Abstract:
PROBLEM TO BE SOLVED: To provide a self-calibration procedure for polarimeter, eliminating the need for input signals to be used as known.SOLUTION: Self-calibration data is taken by moving a polarization controller between several random and unknown states of polarization (SOPs) and recording the detector output values (D, ..., D) for each state of polarization. These values are then used to create an "approximate" calibration matrix. In one exemplary embodiment, the SOP of the incoming signal is adjusted three times (by adjusting a separate polarization controller element, for example), to create a set of four detector output values for each of the four polarization states of the incoming signal - an initial calibration matrix. The first row of this initial calibration matrix is then adjusted to fit the power measurements using a least squares fit. In the third and final step, the remaining elements of the calibration matrix are adjusted to satisfy a given constraint (for example, DOP=100% for all SOPs).
Abstract:
PROBLEM TO BE SOLVED: To provide a spin-polarised charge carrier device. SOLUTION: The device includes a channel 15 for charge carriers composed of a non-ferromagnetic semiconductor material in which charge carriers exhibit spin-orbit coupling, a region 10 of a semiconducting material of a conductive type opposite to the channel, configured so as to form a junction 21 with the channel for injecting spin-polarised charge carriers into an end of the channel and at least one lead 18 1 , 18 2 connected to the channel for measuring a transverse voltage across the channel. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a high-speed polarization device capable of switching a polarization state at high speed, a polarization measuring device capable of performing measurement work of the polarization state at a high speed, and to provide a display device capable of changing by switching contents of display images at a high speed. SOLUTION: The high-speed polarization device 150 for continuously generating different light of the polarization state comprises a plurality of polarization light radiation units 15, each having a polarizer 13 setting a light source 11 and a polarization direction of light from the light source 11 in a specific direction, respectively; a rotating reflective body 17 for outputting the reflected light in a prescribed direction by receiving emission light from the plurality of the polarization light irradiation units 15 by being rotated; and an analyzer 19 for setting the polarization direction of the reflected light on the way of an optical path of the reflected light from the rotating reflective body 17 in a fixed direction. The polarization light radiation unit 15 comprises a first compensator 27, arranged on a circular arc with the center at the rotating reflective body 17 and compensating for the changes in the polarization state due to the rotating reflective body 17. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a polarization evaluation mask and a polarization evaluation method that allows a user to easily evaluate a polarization state in illumination light in an exposure apparatus by user's own efforts. SOLUTION: Three mark regions are formed within an exposure region to be irradiated with illumination light 1 of an exposure apparatus, wherein a fine aperture pattern 40 and two kinds of optical elements 50, 60 are disposed on a light shielding film 300 in the mark region. The fine aperture pattern 40 includes 16 fine apertures arranged in a square grid of 4(rows)×4(columns) at an interval D of 3.0 mm. The optical element 50 consists of four thin polarizers having orientation angles of transmissive polarized light with a 45° difference from one another. The optical element 60 consists of four quarter-wave plates having orientation angles of fast axes with a 45° difference from one another. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To remove effectively a measurement error of a parameter, showing spectropolarization characteristics of a sample which are generated through variously varying, depending on the state of the sample in retardation of a retarder, in a channeled spectroscopic polarimetry. SOLUTION: With focus on the retardation of the retarder being kept constant by stabilization of the incident direction of a light that passes through the retarder, the retarder is arranged on the light source side with respect to the sample; and the influence of the variations or the like of the beam direction due to the sample related to the measurement error is removed effectively. COPYRIGHT: (C)2007,JPO&INPIT