33 results about "Goniophotometer" patented technology

The present invention relates to an artificial leather having nap very little oriented on the surface and having short fibers densely, and hence having a good nubuck-like look and hand, and also relates to a production process thereof. The present invention provides an artificial leather having a nap surface of ultra-fine fibers at least on one side, which is formed by applying an elastic polymer to an ultra-fine fiber-entangled substrate, characterized by being 0.3 g / cm<3 >or more in the apparent density of the artificial leather, being 0.5 mm or less in the nap length, and being 25% or less in the R value obtained from the goniometric reflectance distribution measured with the nap surface rotated from 0 degree to 180 degrees using a goniophotometer. The present invention also provides a process for producing a nubuck-like artificial leather, in which a sheet obtained by applying an elastic polymer to an ultra-fine fiber-entangled substrate is raised to produce a napped sheet, comprising the steps of applying an elastic polymer to an ultra-fine fiber-entangled substrate, substantially solidifying the elastic polymer, immersing the polymer-deposited fiber-entangled substrate into a swelling agent of the elastic polymer, to swell the elastic polymer, compressing the sheet in the normal direction of the sheet, removing the swelling agent by an aqueous solvent, and raising the sheet at least on one side.

A hemispherical goniophotometer is disclosed, in which two pivoting arms are articulated on a revolving rotating arm and are each fitted with a measurement head. The geometry of the arrangement is chosen such that the measurement heads can move along the envelope surface of a hemisphere during rotating of the rotating arm through 360° and pivoting of the pivoting arms through 180°.

Provided is a phase difference film having an excellent front contrast. It is possible to measure a scattered light intensity of a film of a 90-degree incident light of a scattered light profile by a goniophotometer. Provided is a phase difference film characterized in that the difference between the scattered light intensity integration values obtained when the film delay phase axis is arranged horizontally and vertically on a sample table is 0.1 or below in measurement to detect a scattered light intensity at the position of 95 to 165 degrees from a light source.

The invention relates to an optical thin plate, comprising a substrate whose at least one side has a light diffusion layer. When detected by goniophotometer, if the light is projected at 0-90 deg.C, the detected angle of highest outgoing light intensity is plus / minus 10 deg, especially applied to flat displays.

A gonio-spectroradiometer and a measuring method thereof. The gonio-spectroradiometer includes a light source rotating on a light source axis, a first integrating sphere revolving around the light source with respect to a revolving axis perpendicular to the light source axis with a fixed radius and including an entrance formed in a direction to see the light source, a light intensity modulator adapted to modulate light intensity of light received through the first integrating sphere according to the rotation amount of the revolving axis, and a detector adapted to measure output light of the light intensity modulator at each wavelength.

[Problem] Provided is a transparent screen which satisfies both the visibility of the projection light and the transmission light by anisotropically scattering and reflecting the projection light emitted from a light source.[Solving means] A transparent screen according to the present invention comprises a light diffusion layer including a binder and microparticles,said transparent screen having a scattered light brilliance profile characterized to meet the following conditions A to C:A: the emitted light relative brilliance in the 0° direction is from 50 to 95, when the entered light relative brilliance is 100;B: the emitted light relative brilliance in the ±5° direction is 1.1 or less, when the emitted light relative brilliance in the 0° direction is 100; andC: the emitted light relative brilliance in the ±50° direction is 0.0005 or higher, when the emitted light relative brilliance in the 0° direction is 100;when the brilliance is Y from the XYZ color system measured with a goniophotometer.