An electrowetting optical device is provided. The electrowetting optical device includes a conductive liquid and a non-conductive liquid. The non-conductive fluid includes a naphthalene based compound having Formula (I), Formula (II), and/or Formula (III): ##STR00001##
where R.sub.1, R.sub.2, and R.sub.3 are individually alkyl, aryl, alkoxy, or aryloxy groups; X includes carbon, silicon, germanium, tin, lead, and combinations thereof; and Z includes oxygen, sulfur, selenium, tellurium, polonium, and combinations thereof. The conductive liquid may additionally include a transmission recovery agent having Formula (IV) and/or Formula (V): ##STR00002##
where R.sub.4 is an alkyl, fluoroalkyl, aryl, alkoxy, or aryloxy group. The electrowetting optical device additionally includes a dielectric surface in contact with both the conductive and non-conductive liquids where the conductive and non-conductive liquids are non-miscible.

The optical fiber sensing method of the present invention includes steps of: joining heat shrinkable tubes to two ends of a sensing segment of an optical fiber; coupling a fixing element on the heat shrinkable tube below the sensing segment; detachably connecting at least one floating element to the fixing element; placing the floating element into a fluid; and providing an input signal to the sensing segment and generating an output signal after the input signal is processed by the sensing segment, wherein the tensile force applied to the sensing segment would change with variation of the buoyant force upon the floating element, resulting in change of the output signal. Accordingly, the optical fiber sensing method has numerous advantages, including rapid on-site construction, recyclability of components and changeability of design parameters.

A method for checking positioning accuracy of a CNC machine with a machine tool head and a machine table using an x, y, z coordinate system, the method comprising: a) arranging a plurality of vessels on the table, the vessels in fluid connection with each other to form a system of vessels, the vessels filled with a liquid, b) mounting a distance sensor to the tool head, c) positioning the tool head to a position above the surface of the liquid in one of the vessels, d) a determining the z coordinate for which the distance sensor touches the surface of the liquid, or, for a predetermined position of the tool head in z direction above the liquid, determining the distance between the distance sensor and the liquid; steps c) and d) are repeated for each vessel to determine a z coordinate of the surface of the liquid.

A method for checking positioning accuracy of a CNC machine with a machine tool head and a machine table using an x, y, z coordinate system, the method comprising: a) arranging a plurality of vessels on the table, the vessels in fluid connection with each other to form a system of vessels, the vessels filled with a liquid, b) mounting a distance sensor to the tool head, c) positioning the tool head to a position above the surface of the liquid in one of the vessels, d) a determining the z coordinate for which the distance sensor touches the surface of the liquid, or, for a predetermined position of the tool head in z direction above the liquid, determining the distance between the distance sensor and the liquid; steps c) and d) are repeated for each vessel to determine a z coordinate of the surface of the liquid.

An electrowetting optical device is provided. The electrowetting optical device includes a conductive liquid and a non-conductive liquid. The non-conductive fluid includes a naphthalene based compound having Formula (I), Formula (II), and/or Formula (III):

##STR00001##

where R.sub.1, R.sub.2, and R.sub.3 are individually alkyl, aryl, alkoxy, or aryloxy groups; X includes carbon, silicon, germanium, tin, lead, and combinations thereof; and Z includes oxygen, sulfur, selenium, tellurium, polonium, and combinations thereof. The conductive liquid may additionally include a transmission recovery agent having Formula (IV) and/or Formula (V):

##STR00002##

where R.sub.4 is an alkyl, fluoroalkyl, aryl, alkoxy, or aryloxy group. The electrowetting optical device additionally includes a dielectric surface in contact with both the conductive and non-conductive liquids where the conductive and non-conductive liquids are non-miscible.

An electrowetting optical device is provided. The electrowetting optical device includes a conductive liquid and a non-conductive liquid. The non-conductive fluid includes a naphthalene based compound having Formula (I), Formula (II), and/or Formula (III):

##STR00001##

where R.sub.1, R.sub.2, and R.sub.3 are individually alkyl, aryl, alkoxy, or aryloxy groups; X includes carbon, silicon, germanium, tin, lead, and combinations thereof; and Z includes oxygen, sulfur, selenium, tellurium, polonium, and combinations thereof. The conductive liquid may additionally include a transmission recovery agent having Formula (IV) and/or Formula (V):

##STR00002##

where R.sub.4 is an alkyl, fluoroalkyl, aryl, alkoxy, or aryloxy group. The electrowetting optical device additionally includes a dielectric surface in contact with both the conductive and non-conductive liquids where the conductive and non-conductive liquids are non-miscible.

The objective of the invention is to improve the durability and reduce the weight of a device for measuring the difference between the drafts on the two sides of ship, by making it possible to prevent the occurrence of bubbles in a measuring liquid and prevent leakage of the measuring liquid. In order to measure the difference between the drafts on the two sides of a ship, a measuring device (1) is provided with: two liquid level measuring tubes (11) attached respectively to the port and starboard sides of the ship; a communicating hose (41) which causes the two liquid level measuring tubes (11) to communicate with one another; and a drum (51) to which a central portion of the communicating hose (41) is secured, and onto which a left hose section (41a) and a right hose section (41b) are wound simultaneously. In order to bend the central portion of the communicating hose (41) into a U-shape to catch said central portion, the measuring device (1) includes a hose catching projection (51c) which protrudes from an outer peripheral surface of a shaft member (51a) of the drum (51), and a resin coil spring (42) mounted on the central portion of the communicating hose (41).

The objective of the invention is to improve the durability and reduce the weight of a device for measuring the difference between the drafts on the two sides of ship, by making it possible to prevent the occurrence of bubbles in a measuring liquid and prevent leakage of the measuring liquid. In order to measure the difference between the drafts on the two sides of a ship, a measuring device (1) is provided with: two liquid level measuring tubes (11) attached respectively to the port and starboard sides of the ship; a communicating hose (41) which causes the two liquid level measuring tubes (11) to communicate with one another; and a drum (51) to which a central portion of the communicating hose (41) is secured, and onto which a left hose section (41a) and a right hose section (41b) are wound simultaneously. In order to bend the central portion of the communicating hose (41) into a U-shape to catch said central portion, the measuring device (1) includes a hose catching projection (51c) which protrudes from an outer peripheral surface of a shaft member (51a) of the drum (51), and a resin coil spring (42) mounted on the central portion of the communicating hose (41).

An electrowetting optical device is provided. The electrowetting optical device includes a conductive liquid and a non-conductive liquid. The non-conductive fluid includes a naphthalene based compound having Formula (I), Formula (II), and/or Formula (III): ##STR00001##
where R.sub.1, R.sub.2, and R.sub.3 are individually alkyl, aryl, alkoxy, or aryloxy groups; X includes carbon, silicon, germanium, tin, lead, and combinations thereof; and Z includes oxygen, sulfur, selenium, tellurium, polonium, and combinations thereof. The conductive liquid may additionally include a transmission recovery agent having Formula (IV) and/or Formula (V): ##STR00002##
where R.sub.4 is an alkyl, fluoroalkyl, aryl, alkoxy, or aryloxy group. The electrowetting optical device additionally includes a dielectric surface in contact with both the conductive and non-conductive liquids where the conductive and non-conductive liquids are non-miscible.

An electrowetting optical device is provided. The electrowetting optical device includes a conductive liquid and a non-conductive liquid. The non-conductive fluid includes a naphthalene based compound having Formula (I), Formula (II), and/or Formula (III): ##STR00001##
where R.sub.1, R.sub.2, and R.sub.3 are individually alkyl, aryl, alkoxy, or aryloxy groups; X includes carbon, silicon, germanium, tin, lead, and combinations thereof; and Z includes oxygen, sulfur, selenium, tellurium, polonium, and combinations thereof. The conductive liquid may additionally include a transmission recovery agent having Formula (IV) and/or Formula (V): ##STR00002##
where R.sub.4 is an alkyl, fluoroalkyl, aryl, alkoxy, or aryloxy group. The electrowetting optical device additionally includes a dielectric surface in contact with both the conductive and non-conductive liquids where the conductive and non-conductive liquids are non-miscible.