Abstract:
A borehole apparatus for analyzing the composition of a formation fluid includes a chamber that contains the fluid, and a light source that directs light through the fluid in the chamber. The optical path of the light is modified such that an output fiber optic bundle receives indirect light through the fluid. One embodiment comprises a diffuser in the optical path, which forward scatters the light to the output fiber optic bundle. Another embodiment comprises the misalignment of an input fiber optic bundle relative to the output fiber optic bundle. Collimators can be subsituted for the fiber optic bundles.
Abstract:
A particle counter operates by the opacity method and has a light barrier or electric eye. The light beam of the light barrier or electric eye penetrates a measuring channel for a fluid transverse to the passage of the fluid through the channel. An electronic analysis assembly is connected in series following the receiver of the light barrier or electric eye. The light emitting surface of the light barrier or electric eye is formed by the end surface of a light-emitting fiber. The light inlet or receiving surface is formed by the end surface of a receiving fiber. The end surface of light-emitting fiber lies in a first boundary surface of the measuring channel. The end surface of the receiving fiber is concentric to the light-emitting fiber end surface and is located in a second boundary surface of the measuring channel parallel to the first boundary surface.
Abstract:
An examination apparatus for examining with transmission photometry an object of interest. The apparatus comprises: light launching means for successively launching an incidence light beam to the object at an incidence site; and light pickup means for picking up, in synchronism with launching of the incidence light beam, light beams scattered in the object from a plurality of output sites as light intensity data, and performing mathematical processing on the light intensity data for every launching of said incidence light beam to obtain absorption data representing a light absorption quantity at the incidence site.
Abstract:
A process for infrared spectroscopic monitoring of insitu compositional changes in a polymeric material comprises the steps of providing an elongated infrared radiation transmitting fiber that has a transmission portion and a sensor portion, embedding the sensor portion in the polymeric material to be monitored, subjecting the polymeric material to a processing sequence, applying a beam of infrared radiation to the fiber for transmission through the transmitting portion to the sensor portion for modification as a function of properties of the polymeric material, monitoring the modified infrared radiation spectra as the polymeric material is being subjected to the processing sequence to obtain kinetic data on changes in the polymeric material during the processing sequence, and adjusting the processing sequence as a function of the kinetic data provided by the modified infrared radiation spectra information.
Abstract:
In a fiber-optical sensor used for measuring the Doppler broadening of scattered laser light by the principle of quasi-elastic light scattering (QELS), the scattered light originating from particles in movement, the emergence surface (7) for the laser light at the end of a single-mode or multimode light guide (3) used as an immersion probe is inclined at an angle 0
Abstract:
A particle size measuring device for effecting with regard to particles present in a fluid substance the simultaneous measurement in situ of two parameters thereof; namely, particle size distribution and volumetric density. The particle size measuring device comprises a laser light source (14), a laser light conveying device (40), a collimator, a first focusing device (64), a defined sample path (74) through which particles to be measured pass, a second focusing device (78) and a detector device (82). The mode of operation of the particle size measuring device is such that the laser light from the laser light source (14) is conveyed by means of the laser light conveying device (40) to the collimator. After being collimated the laser light is transmitted to the first focusing device (64) whereby the laser light is focused and is then made to pass across the sample path (74). In the course of passing across the sample path (74), the laser light is scattered by the particles that are present in the sample path (74). Both scattered and collimated light is collected by the second focusing device (78) and the focused thereby on to the detector device (82) such that the intensity distribution of the laser light is gathered by the detector device (82). Particle size distribution is inferred from the light distribution received by the detector device (82) and volumetric density is calculated by means of a predetermined equation.
Abstract:
A process cell (1) for the analysis of liquids, particularly cloudy ones with high light absorption, has a measuring chamber (2) through which flows said liquid, which has two windows (3) lying at a short distance opposite each other for the passage of the measuring light. The latter are held in holding devices (4) which are supported by a common frame (5), which is sufficiently movable relative to the cell housing (6) to be able to perform heat movements. The frame (5) and the holding devices (4) consist of a material with essentially the same coefficient of thermal expansion, so that changes in length of the holding devices (4) occurring upon temperature changes can each time be compensated so that the distance between the two windows (3) practically does not change and thus no changes in the measuring results determined by temperature fluctuations occur.
Abstract:
An improved and unique liquid light tube (guide) end cap assembly particularly useful in a system for the clinical analysis of liquid biological samples for directing wavelengths of light is described. The assembly comprises a light guide having projecting at one end portion thereof a quartz member and a housing for containing the end portion of the light guide and the quartz member, thereby forming an aperture between the quartz member and the housing, the aperture having a depth of between about 0.002 and 0.007 inches.
Abstract:
A process for infrared spectroscopic monitoring of insitu compositional changes in a polymeric material comprises the steps of providing an elongated infrared radiation transmitting fiber that has a transmission portion and a sensor portion, embedding the sensor portion in the polymeric material to be monitored, subjecting the polymeric material to a processing sequence, applying a beam of infrared radiation to the fiber for transmission through the transmitting portion to the sensor portion for modification as a function of properties of the polymeric material, monitoring the modified infrared radiation spectra as the polymeric material is being subjected to the processing sequence to obtain kinetic data on changes in the polymeric material during the processing sequence, and adjusting the processing sequence as a function of the kinetic data provided by the modified infrared radiation spectra information.
Abstract:
It comprises a monochromatic radiation source; an optical fibre connected by one end to the radiation source and by the other end to an observation probe for transmitting the monochromatic radiation from the source to the observation probe and the photoluminescent radiation from the probe to signal processing means; an observation probe able to move in the cavity and having a mirror inclined with respect to the surface to be observed for directing the radiation transmitted by the optical fibre towards said wall and for reflecting a return radiation to a return optical fibre conducting it to processing means; and a rotary optical connection placed on the optical fibre for permitting the continuity of the optical line and the advance of the probe without any corkscrewing of said optical fibre.