EP0099756A2
Expired / Lapsed
EP
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Diaphanoscopy apparatus
Assignee: Individual
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Filing: 1983-07-19
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Granted: —
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Expires: 2003-07-19
Abstract
Abstract In an apparatus for diaphanoscopy means (9) are provided for sequentially illuminating the object with light of at least two different wavelengths, detector means (32) are provided for sensing transilluminated light in relation to each sequential illumination, recording means (38,40) are provided for separately recording the output of the detector means (32) related to the sequential illumination, and a display means (66) is provided which represents the absorption characteristics of the object at the different wavelengths.
Inventors
- 👤 Milton Stoller
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 19:41
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/0059; A61B5/0082; A61B5/0091; A61B5/43; A61B5/4306; A61B5/4312; G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/314
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
1 . A diaphanoscopy apparatus having a means for transilluminating an object with light characterised in that means (9) are provided for sequentially illuminating the object with light-of at least two different wavelengths, detector means (32) are provided for sensing transilluminated light in relation to each sequential illumination, recording means (38, 40)' are provided for separately recording the output of the detector means (32) related to the sequential illumination, and a display means (66) is provided which represents the absorption characteristics of the object at the different wavelengths.
Claim 2
Dependent Claim
88 words
1 . A diaphanoscopy apparatus having a means for transilluminating an object with light characterised in that means (9) are provided for sequentially illuminating the object with light-of at least two different wavelengths, detector means (32) are provided for sensing transilluminated light in relation to each sequential illumination, recording means (38, 40)' are provided for separately recording the output of the detector means (32) related to the sequential illumination, and a display means (66) is provided which represents the absorption characteristics of the object at the different wavelengths.
Claim 3
Dependent Claim
67 words
A diaphanoscopy apparatus according to claim 1, further characterised in that an encoding means (44) is provided for providing a characteristic value which is a function of the sequential outputs of the detector means (32) relating to the different wavelengths and the detector means (32) is adapted for scanning so as to produce an image from a series of characteristic values for different parts of the object.
Claim 4
Dependent Claim
46 words
A diaphanoscopy apparatus according to claim 2, further charactersied in that the encoding means (44) includes a means (46) for producing a ratio of the respective detector outputs as a characteristic signal and the detector means (32) is a television camera responsive to the different wavelengths.
Claim 5
Dependent Claim
43 words
A diaphanoscopy apparatus according to claim 2 or claim 3, further characterised in that means (48) are provided for assigning intensity levels for two different colours for teach characteristic value and a modulator (64) controls a colour television display (66) in response thereto.
Claim 6
Dependent Claim
50 words
A diaphanoscopy apparatus according to any of the preceding claims 2 to 4, further characterised in that synchronising means (42) are provided for synchronising sequential transillumination and recordal of the output of the detector means (32) to thereby store encoded frame information resulting from scanning relating to the different wavelengths.
Claim 7
Dependent Claim
50 words
A diaphanoscopy apparatus according to claim 5, further characterised in that the recording means (38,40) store data relating to the sequential outputs of the detector means (32) at simultaneously addressable memory locations for a particular part of the object and said data are available for processing to produce an image.
Claim 8
Dependent Claim
43 words
A diaphanoscopy apparatus according to claim 6, in which the data are subjected to division in a divider (46) for producing a pair of chrominance values and to an adder (50) and. averaging means (52) for producing a luminance value for the image.
Claim 9
Dependent Claim
38 words
8 . A diaphanoscopy apparatus according to claim 6 or claim 7, further characterised in that means are provided for adjusting the light intensity, the detector output and/or the information recorded to enable the image to be calibrated.-
Claim 10
Dependent Claim
72 words
9 . A diaphanoscopy apparatus according to any of the preceding claims in which the means (9) include a pair of flash lamps (10, 12), means (14, 16) for sequentially energising the lamps (10,12), filter means (26,28) to provide light within two separate frequency bands, and means (22,24,30) for collecting filtered light to provide a single illuminating source capable of sequentially illuminating the object with light of at least two different wavelengths.
Claim 11
Dependent Claim
60 words
A diaphanoscopy apparatus according to any of claims 1 to 9 further characterised in that the means (9) includes a broad spectrum source (88), movable filter elements (86) passing light within two separate frequency bands sequentially, light transmitting means (30) to provide a single illuminating source capable of sequentially illuminating the object with light of at least two different wavelengths.
Claim 12
Dependent Claim
43 words
A diaphanoscopy apparatus according to claim 10 in which shutter means (90) are provided rotatable with the filters but relatively movable with respect thereto by differential means (94) for adjusting the relative intensity of the sequentially generated light of different wavelengths for calibration.
Claim 13
Dependent Claim
82 words
A non-destructive testing method using diaphanoscopy in which an object is transilluminated with light, characterised in that the transilluminating light provides sequentially at least two different spectral compositions, the transilluminated light is detected and the intensity of the sequentially transilluminated light separately recorded for a plurality of object locations and a characteristic value is derived from a combination of the respective intensity values and displayed to provide an image representing the absorption of light on transillumination of the object at different wavelengths.
Claim 14
Dependent Claim
82 words
A non-destructive testing method using diaphanoscopy in which an object is transilluminated with light, characterised in that the transilluminating light provides sequentially at least two different spectral compositions, the transilluminated light is detected and the intensity of the sequentially transilluminated light separately recorded for a plurality of object locations and a characteristic value is derived from a combination of the respective intensity values and displayed to provide an image representing the absorption of light on transillumination of the object at different wavelengths.
References Cited (Backward Citations)
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