摘要:
The subject matter of this invention is a device for measuring the contact angle of a liquid drop on a material surface. The shadow of a drop of a test liquid is projected onto a tilted shadow surface. An image of the drop on the shadow surface is recorded with an image recording device, and the contact angle is calculated from the image and the known angle of tilt of the shadow surface. A method that is suitable for this is likewise disclosed.
摘要:
The present invention relates to an apparatus and method for measuring surface tension. More particularly, the present invention relates an apparatus and method for measuring surface tension through an electrical scheme which is simpler and has improved accuracy compared to a conventional optical scheme.
摘要:
Described herein are a device and method for measuring the wetting characteristics of a liquid on a surface of a material by depositing a volume of liquid on the surface of the material, imparting kinetic energy to the liquid, and obtaining information about the geometry of the volume of the liquid on the surface. The device includes a liquid dispensing component, a kinetic energy imparting component, a position determining component, and a data generating component.
摘要:
Described herein are a device and method for measuring the wetting characteristics of a liquid on a surface of a material by depositing a volume of liquid on the surface of the material, imparting kinetic energy to the liquid, and obtaining information about the geometry of the volume of the liquid on the surface. The device includes a liquid dispensing component, a kinetic energy imparting component, a position determining component, and a data generating component.
摘要:
The present invention refers to a method of infiltrating enamel for the prevention and/or treatment of carious lesions comprising (a) exposing an enamel area to a conditioner comprising hydrochloric acid; (b) exposing the conditioned enamel area to an infiltrant; and (c) curing the infiltrant. The present invention further refers to a kit for carrying out the method of infiltrating enamel, which comprises a conditioner comprising hydrochloric acid and an infiltrant comprising at least one low viscous dental resin. Alternatively, the kit comprises ready-to-use means for carrying out the method of infiltrating enamel, e.g. application strips with delivery pads soaked with conditioner or infiltrant. The present invention also refers to a method for identifying an infiltrant by calculation of the penetration coefficient, and to an infiltrant identified by the method having a penetration coefficient of >50 cm/s or comprising a low viscous light curing resin having a penetration coefficient of >50 cm/s.
摘要:
A drop on a sample surface in a gaseous environment has a curved surface with a symmetry axis and a defined volume. To determine the contact angle, an object is imaged based on the reflection property of the surface of the drop, the position of the object with respect to the optical axis of an optical measuring system and the position of the object with respect to the sample surface, with the symmetry axis of the drop being arranged in or in the vicinity of the optical axis. The distance between the image and the optical axis of the drop is measured. The radius of curvature of the drop is determined based on the measured distance, and the contact angle is determined from the radius of curvature.
摘要:
In order to accurately measure a shape feature of a minute droplet arranged on a substrate by a simple method, with respect to the droplet, the substrate is perpendicularly irradiated with laser light to cause diffracted light fluxes generated during passage of the laser light through the droplet to interfere with each other, so that a diffraction pattern is obtained. The diffraction pattern formed on a screen of a detector as an image is picked up by an image pickup apparatus. The shape feature of the droplet is measured by using the resultant diffraction pattern and a refractive index of the droplet.
摘要:
It is an object of the present invention to provide a spacer for a liquid crystal display and a method of producing a spacer for a liquid crystal display, which improve light leakage around a spacer for a liquid crystal display in cutting off light of a liquid crystal display and in vibrating a liquid crystal display and in addition have a good dry spraying property.The present invention relates to a spacer for a liquid crystal display, which comprises a base particle and a polymer coating the surface of said base particle, a contact angle A1 of water on the spacer, measured at 25° C. when said spacer is annealed at a temperature of an annealing temperature T1 or higher in fabricating a liquid crystal display for 1 hour or more and then cooled, and a contact angle B of water on the spacer, measured at 25° C. without annealing the spacer, satisfying the relationship of the following equation (1): A1−B≧1°. (1)