Abstract:
A gas detecting apparatus includes a plate including a first reactive surface and a second reactive surface each coated with a chemical reagent which is capable of causing a color reaction with a particular gas, a protective member covering the first reactive surface, a transparent protective member covering the second reactive surface, a protective package enclosing therein the plate with the first reactive surface covered with the protective member and the second reactive surface covered with the transparent protective member, and a connector connecting the protective member and the protective package to each other.
Abstract:
The invention relates to a sensor for determining the energy of radiation of a type that is capable of converting oxygen into ozone, and to a use of such a sensor. According to the invention, the sensor contains a measuring chamber (1) that can be transirradiated by the radiation and has a gas inlet (4) and a gas outlet (6), means (8) for feeding an oxygen containing gas (9) into the measuring chamber, via the gas inlet, and for discharging the gas via the gas outlet, one ozone sensor element (10) for measuring the ozone content of the gas (9a) located in the measuring chamber or discharged via the gas outlet, and evaluating means (12) for determining the radiant energy from the measured ozone content. The sensor can be used, for example, to determine radiant energy in an optical imaging system operating with the radiation. Use, for example, in microlithography projection exposure systems.
Abstract:
A method of calculating a quantity of light by measuring, by using an adhering force measuring unit (71), the adhering force of an ultraviolet light-curable tape (11 or 21) relying upon the quantity of ultraviolet light with which the ultraviolet light-curable tape is irradiated from an ultraviolet light irradiation unit (61), and calculating, by using a calculation unit, the quantity of ultraviolet light corresponding to a predetermined adhering force, from the measured adhering force of the ultraviolet light-curable tape, and a device therefor. The predetermined adhering force may have been stored in advance in the storage unit or the predetermined adhering force may be determined in advance relying upon at least either one of the kind of the ultraviolet light-curable tape or the elapsed time of the ultraviolet light-curable tape. Then, the quantity of light necessary for the ultraviolet light-curable tape that is used is automatically calculated to avoid a problem caused by an insufficient quantity of light or an excess quantity of light.
Abstract:
A luminometer for determining the composition of a specimen sample includes an annular guide path for sample containing cuvettes within a light tight housing. A rotor moves spaced segments through the guide path with the cuvettes positioned between the segments. The luminometer further includes one or two detector assemblies coupled to the housing and positioned to view and detect light emitted by cuvettes as they pass along the guide path between segments. A cuvette is advanced around the housing via the rotor and rotor segments and when the cuvette reaches a predetermined position on the housing, a reagent, such as a base, is added to the cuvette to initiate a chemiluminescent reaction within the cuvette and provide an emission of light energy in a predetermined spectral range. The luminometer has a waste aspiration probe to remove the contents of the cuvette after it passes the detector. A cuvette elevator moves a sample containing cuvette into the guide path between segments and an exit chute removes cuvettes after their contents have been aspirated. The luminometer permits continuous uninterrupted sample testing when coupled to an incubation chamber in which the cuvettes receive samples and test specific reagents before they are moved into the luminometer by the elevator.
Abstract:
A detecting device in the form of a testing tube or dosimeter having a carrier indicating a color reaction requires a reagent liquid for carrying out a measurement. The reagent liquid is contained in a separate reagent supply vessel and the carrier is impregnated with a color indicator. For carrying out a measurement, the reagent supply from the supply vessel must be brought into contact with the porous carrier. A uniform wetting of the surface of the carrier subjected to the reagent solution is achieved after the reagent solution is emptied from the supply vessel. This is achieved by providing a reagent collection chamber between the carrier and the reagent supply vessel into which the reagent solution pours when the supply vessel is opened and wherein the reagent solution is accommodated and into which the carrier extends so that its end face is subjected to the reagent solution so that this end face can be wetted at the same time.
Abstract:
A meter for determining the integrated effect of the exposure of human skin to the sun's ultra-violet radiation by means that provide an instrument cheap enough to use on a wide scale. The World Health Organization sees "the greatest value" in a suitable instrument. The solar radiation is passed through a UV filter to a fused silica tube containing a disulphide solution which, under the action of ultra violet (UV) radiation, displays a wavelength response similar to that of the erythemal action spectrum.
Abstract:
A night vision device in which a screen has a layer of cholesteric material that is heated to the critical value for maximum extinction of a source of circularly polarized monochromatic light. The screen is irradiated with a source of circularly polarized monochromatic light that is attenuated by said cholesteric material until infrared rays from an object are focused onto the screen to cause localized heating of the cholesteric material and thereby passage of the circularly polarized monochromatic light to an opposite face of the screen. The monochromatic light passing to the opposite face of the screen is viewed as an image of the object.
Abstract:
Electromagnetic radiation in the frequency range of 1012.5 to 1017 cycles per second is detected, using a cholesteric liquidcrystal material to which there has been added, in the case of radiation of lower frequency, a suitable oil or oil-soluble dye, and in the case of radiation of higher frequency, a phototropic material such as beta-carotene or cholesteryl p-phenylazophenyl carbonate, a novel compound.
Abstract:
A chemical exposure indication device is disclosed. The device is removably attachable to a structure and includes a substrate having a first surface and a second surface and an indicating layer overlying the first substrate surface. The indicating layer includes a coating material that is chemically reactive with a pre-determined chemical compound that is known to degrade the structure. When the coating material is exposed to that corrosive compound in a pre-determined level associated with degradation of a metallic structure, the coating material provides a visual indication of the presence of the corrosive compound.