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公开(公告)号：GB2099143A
公开(公告)日：1982-12-01
申请号：GB8214249
申请日：1982-05-17
Applicant: HALLIBURTON CO
Abstract: A method of logging earth formations to ascertain relative elemental abundancies of potassium (K), uranium (U) and thorium (T) is disclosed. A natural gamma ray spectrum of an unknown borehole is compared with individual standard gamma ray spectra of potassium, uranium and thorium in at least four energy ranges or bands. Decay peaks of the three elements are encompassed by three of the energy bands and at least one other energy band is used to monitor the changes in shape of the unknown spectrum caused by borehole conditions differing from that of the standard or calibration boreholes. A function derived from the gamma ray count rates in the four bands is used to compensate the elemental abundancies of the three elements to be detected in the unknown spectrum for the effects of differing borehole conditions in the unknown borehole from the standard borehole conditions.
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公开(公告)号：SU958870A1
公开(公告)日：1982-09-15
申请号：SU3246453
申请日：1981-02-11
Applicant: DUBROVIN ALEKSANDR N , SNIGIREV YURIJ A , STARTSEV GEORGIJ P
Inventor： DUBROVIN ALEKSANDR N , SNIGIREV YURIJ A , STARTSEV GEORGIJ P
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公开(公告)号：GB2061494A
公开(公告)日：1981-05-13
申请号：GB8032239
申请日：1980-10-07
Applicant: HAJIME INDUSTRIES
Abstract: An inspection device is disclosed which includes a color sensor which has a plurality of photoelectric conversion elements each being responsive to respective different wave lengths of light from an object to be inspected and producing an electrical signal, a zero balance setter which processes the output signal from the color sensor and then takes a zero balance, a tolerance range setter which receives the output of the zero balance setter and produces an abnormal signal in conjunction to a tolerance range of the object to be inspected, a detector which produces an electrical signal to notify when the object arrives at a predetermined location; and a detection location timing section which passes the output of the tolerance range setter by the output signal from the detector.
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公开(公告)号：DE7929592U1
公开(公告)日：1981-02-19
申请号：DE7929592
申请日：1979-10-19
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公开(公告)号：CH617769A5
公开(公告)日：1980-06-13
申请号：CH415277
申请日：1977-04-01
Applicant: APPLIED PHOTOPHYSICS LTD
Inventor： WEST MICHAEL ANTHONY
Abstract: The aim is to provide an improved device and a method for identifying objects or bodies by checking the distribution of intensity and wavelength in the emission spectrum. A source of exciting radiation serves to direct exciting radiation onto the body located in a test station. A plurality of light pipes (24, 25, 26) simultaneously receive the luminous radiation emitted by the luminous material and feed the luminous radiation to photodetectors (18, 19, 20). Assigned to each light pipe (24, 25, 26) is an optical filter (21, 22, 23) which passes radiation of a specific wavelength or of a specific wavelength region. A circuit receives the electric output signals derived from the photodetectors and changes the signal level of the photodetectors by attenuation or amplification. The changed signal levels are compared with the signal level derived from another photodetector. It is indicated whether the level ratio is in a specific desired range.
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Patent Agency Ranking
公开(公告)号：GB2012067A
公开(公告)日：1979-07-18
申请号：GB7845611
申请日：1978-11-22
Applicant: IBM
Abstract: A spectrophotometer includes a dispersive element 9 and an array 5 of photodetectors 6 arranged to provide output signals proportional to the intensities of the dispersed beams directed onto detectors 6. A lens 8 is arranged between an entrance aperture 3 and the dispersive element 9. The entrance aperture 3 is located at the focal point of lens 8. The lens 8 directs beams received through the entrance aperture 3, as a bundle of parallel beams onto the dispersive element 9. The beam components diffracted by the dispersive element 9 as a function of their respective wavelengths are directed in different directions, onto the photodetectors 6 associated with respective specific wavelengths.
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公开(公告)号：FR2305717B1
公开(公告)日：1978-10-13
申请号：FR7608474
申请日：1976-03-24
Applicant: KLOECKNER WERKE AG
Abstract: An arrangement of the Rowland character includes a support and a concave grating on the support for producing the spectrum characteristic of a sample being investigated. The support has a series of slits thereon which are positioned on the Rowland circle and are adjusted to the spectral lines of samples to be investigated. An element on the support is provided with a primary slit for directing the radiation derived from a sample being investigated onto the concave grating. The primary slit is positioned on the Rowland circle and the element provided with the primary slit is mounted on the support for movement along the arc of the Rowland circle. The element is mounted in such a manner as to be arrestable in a plurality of positions. The element is favorably in the form of a plate. A preferred embodiment contemplates the provision of a pair of grooves in the support, which latter may be in the form of a housing, with the grooves following the curvature of the Rowland circle and the element being guided in the grooves. The edges of the element located in the grooves may be provided with openings in which there are accommodated spherical members as well as biasing elements for urging the spherical members into contact with the grooves.
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公开(公告)号：GB1353013A
公开(公告)日：1974-05-15
申请号：GB1353013D
申请日：1970-03-02
Applicant: JOHNSON MATTHEY CO LTD
Abstract: 1353013 Spectrometric analysis JOHNSON MATTHEY & CO Ltd 19 April 1971 [2 March 1970] 9970/70 Heading G1A In spectrometric analysis of a substance which is volatilized by means of e.g. an arc or spark, the effects of background radiation are compensated for. The apparatus comprises means to volatilize a sample, means to disperse the emitted radiation and a plurality of slits, each with an associated photo-multiplier, by which the intensities of the spectral lines representative of different elemental constituents may be measured using an integration circuit. When a plurality of constituents are to be measured, and these take different times to burn up, the integrated intensity for a quicker burning constituent may thus include a larger contribution from background radiation than can be afforded for accurate measurement. In order to suppress the background, only voltage signals above a pre-set threshold corresponding to the (previously calculated) background intensity, are integrated. The circuit for each photo-multiplier, Fig. 2, includes an operational amplifier 4 which produces amplified negative signals when the photo-multiplier output goes over the background threshold pre-set by 6. These are inverted by operational amplifier 8 whose output when positive, as sensed by operational amplifier 9, is gated by FET 10 and is integrated by a selected one of capacitors 11, 11a. The setting of potentiometer 6 is decided during a standardizing measurement on a pure matrix metal sample, the slider 76 being adjusted such that with switch 7 in the "set" position, the meter 16 registers zero or thereabouts (representing the background). Alternatively, a chart record may be taken on a pure sample and the background setting for 6 calculated therefrom. In measurements on unknown samples, the voltages attained by the capacitor in the channel for each constituent is read by the meter 16 and correlated withpreviously prepared calibration graphs. A single voltmeter may be switched to each capacitor in turn. A digital voltmeter may be used.
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公开(公告)号：GB2099143B
公开(公告)日：1984-10-31
申请号：GB8214249
申请日：1982-05-17
Applicant: HALLIBURTON CO
Abstract: A method of logging earth formations to ascertain relative elemental abundancies of potassium (K), uranium (U) and thorium (T) is disclosed. A natural gamma ray spectrum of an unknown borehole is compared with individual standard gamma ray spectra of potassium, uranium and thorium in at least four energy ranges or bands. Decay peaks of the three elements are encompassed by three of the energy bands and at least one other energy band is used to monitor the changes in shape of the unknown spectrum caused by borehole conditions differing from that of the standard or calibration boreholes. A function derived from the gamma ray count rates in the four bands is used to compensate the elemental abundancies of the three elements to be detected in the unknown spectrum for the effects of differing borehole conditions in the unknown borehole from the standard borehole conditions.
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