Abstract: According to color measuring apparatus and method and a liquid crystal display system S of the present invention, intensity signals obtained by receiving radiant light from a liquid crystal color display 3 at a first viewing angle and corresponding to at least three mutually different spectral responsivities are converted into information on a plurality of primary color intensities of the liquid crystal color display 3, and the intensity signals by the first viewing angle are corrected to signal intensities by a second viewing angle. Thus, these color measuring apparatus and method are capable of a more accurate measurement even at a dark gradation. The liquid crystal display system can more accurately calibrate a display surface 3a of the liquid crystal color display 3 even at a dark gradation.

Abstract: An optical property measurement apparatus includes: a main body which includes a plane-shape surface that is so disposed as to face the display portion; an optical sensor which receives light directed from an opening that is formed through the plane-shape surface; and a support portion which is disposed on a side of the plane-shape surface and keeps a constant distance between the display portion and the plane-shape surface; wherein a light shield portion that is so disposed as to enclose a circumferential area of the opening of the plane-shape surface and shields entrance of light from a region other than a measurement target region of the display portion when the optical property is measured.

Abstract: A spectral characteristic measuring apparatus includes: an illuminating section for irradiating illumination light onto a sample; a spectral section for separating light from the sample irradiated with the illumination light into light rays in accordance with wavelengths; a light receiving section including a plurality of light receiving elements for receiving the light rays separated by the spectral section in accordance with wavelengths, and converting the received light rays into electrical output signals; and a storing section for storing a combined central wavelength of each of the light receiving elements calculated in advance based a spectral intensity distribution of the illumination light.

Abstract: According to color measuring apparatus and method and a liquid crystal display system S of the present invention, intensity signals obtained by receiving radiant light from a liquid crystal color display 3 at a first viewing angle and corresponding to at least three mutually different spectral responsivities are converted into information on a plurality of primary color intensities of the liquid crystal color display 3, and the intensity signals by the first viewing angle are corrected to signal intensities by a second viewing angle. Thus, these color measuring apparatus and method are capable of a more accurate measurement even at a dark gradation. The liquid crystal display system can more accurately calibrate a display surface 3a of the liquid crystal color display 3 even at a dark gradation.

Abstract: An optical property measurement apparatus includes: a main body which includes a plane-shape surface that is so disposed as to face the display portion; an optical sensor which receives light directed from an opening that is formed through the plane-shape surface; and a support portion which is disposed on a side of the plane-shape surface and keeps a constant distance between the display portion and the plane-shape surface; wherein a light shield portion that is so disposed as to enclose a circumferential area of the opening of the plane-shape surface and shields entrance of light from a region other than a measurement target region of the display portion when the optical property is measured.

Abstract: A spectral characteristic measuring apparatus includes: an illuminating section for irradiating illumination light onto a sample; a spectral section for separating light from the sample irradiated with the illumination light into light rays in accordance with wavelengths; a light receiving section including a plurality of light receiving elements for receiving the light rays separated by the spectral section in accordance with wavelengths, and converting the received light rays into electrical output signals; and a storing section for storing a combined central wavelength of each of the light receiving elements calculated in advance based a spectral intensity distribution of the illumination light.

Abstract: An apparatus for measuring a goniometric reflection property of a sample has: one or more illuminators; a toroidal mirror which is rotationally symmetrical around a center axis effectively contacting with a surface of the sample; a light receiver having an incident aperture on the center axis; a rotating optics which rotates around a rotation axis which effectively coincides with the center axis; and a controller for controlling operations of the illuminators, the light receiver, and the rotating optics, wherein the toroidal mirror reflects light fluxes emitted from the surface of the sample illuminated by the one or more illuminators in emitting directions perpendicular to the center axis and directs each of the light fluxes to the center axis, and wherein the rotating optics specifies one of the light fluxes reflected by the toroidal mirror and directs the specified light flux to the incident aperture of the light receiver.

Abstract: An apparatus for measuring a goniometric reflection property of a sample has: one or more illuminators; a toroidal mirror which is rotationally symmetrical around a center axis effectively contacting with a surface of the sample; a light receiver having an incident aperture on the center axis; a rotating optics which rotates around a rotation axis which effectively coincides with the center axis; and a controller for controlling operations of the illuminators, the light receiver, and the rotating optics, wherein the toroidal mirror reflects light fluxes emitted from the surface of the sample illuminated by the one or more illuminators in emitting directions perpendicular to the center axis and directs each of the light fluxes to the center axis, and wherein the rotating optics specifies one of the light fluxes reflected by the toroidal mirror and directs the specified light flux to the incident aperture of the light receiver.

Abstract: The present invention provides a three-dimensional measuring apparatus comprising a light projector for projecting light to an object, a light receiving element, a light receiving optical system for leading light projected on and then reflected by the object to the light receiving element, and a calculator for obtaining measured data for three-dimensional shape measurement based on signals output from the light receiving element. The light receiving optical system includes a first optical filter which transmits only light having substantially the same range of wavelengths as that of the light projected from the light projector, at least one second optical filter which transmits light having a different range of wavelengths as that of the first optical filter and a filter selector which selectively locates one of the first optical filter or the second filter or filters at an optical path of the light receiving optical system.

Abstract: The present invention provides a three-dimensional measuring apparatus comprising a light projector for projecting light to an object, a light receiving element, a light receiving optical system for leading light projected on and then reflected by the object to the light receiving element, and a calculator for obtaining measured data for three-dimensional shape measurement based on signals output from the light receiving element. The light receiving optical system includes a first optical filter which transmits only light having substantially the same range of wavelengths as that of the light projected from the light projector, at least one second optical filter which transmits light having a different range of wavelengths as that of the first optical filter and a filter selector which selectively locates one of the first optical filter or the second filter or filters at an optical path of the light receiving optical system.

Abstract: Object of the present invention is to generate highly reliable three-dimensional data. The invention provides a method and an apparatus for measuring a three dimensional position of a point on an object by calculating a centroid of a temporal distribution or a spatial distribution of a light reception amount based on a set of light reception data indicating light reception intensity of a light reflected at the object. The three-dimensional measurement apparatus comprises a calculator for calculating a centroid based on the light reception data exceeding a threshold value, a setting section capable of varying the threshold value and a judgment section for determining a difference between a centroid based on the light reception data exceeding a threshold value and a centroid based on the light reception data exceeding another threshold value and judging if the centroids are correct or not based on the difference.