GB1282332A - Improvements in or relating to gloss sensing units - Google Patents
Improvements in or relating to gloss sensing unitsInfo
- Publication number
- GB1282332A GB1282332A GB01690/70A GB1169070A GB1282332A GB 1282332 A GB1282332 A GB 1282332A GB 01690/70 A GB01690/70 A GB 01690/70A GB 1169070 A GB1169070 A GB 1169070A GB 1282332 A GB1282332 A GB 1282332A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gloss
- signal
- sensing unit
- unit
- fed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 abstract 4
- 230000007613 environmental effect Effects 0.000 abstract 3
- 230000005855 radiation Effects 0.000 abstract 3
- 238000011109 contamination Methods 0.000 abstract 2
- 239000000356 contaminant Substances 0.000 abstract 1
- 239000000428 dust Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/57—Measuring gloss
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/86—Investigating moving sheets
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
1282332 Gloss sensing unit FAIRCHILD CAMERA & INSTRUMENT CORP 11 March 1970 [1 April 1969] 11690/70 Heading G1A A gloss sensing unit, Fig.1, is rendered independent of environmental contamination by using three separate radiation paths 10, 20, 30 formed by a common infrared source 21 together with three collimating lenses 11, 21, 31 and three sensing units 12, 22, 32, each including a focusing lens and a photo-diode, path 30 including a reflection by a gloss reference standard 2 in an enclosed chamber, and path 20 providing information for a measure of environmental contamination. Radiation in path 10 is directed via window 13 on to the moving surface 4 of the material (e.g. paper) whose gloss is being measured and thence via window 14 to sensing unit 12. Radiation paths 10 and 20 are exposed to the environment of the material 4 and so dust will eventually coat windows 13, 23, 14, 24. The signals from sensing units 22, 32, are fed into a differential amplifier A 1 , Fig. 5, and the signals from sensing unit 12 and from a tuning potentiometer are fed into a different amplifier A 2 ; the outputs of each amplifier being fed to a further differential amplifier A 3 . Initially the signal from unit 22 is adjusted by means of iris 25 till it equals the signal from unit 32, and initially potentiometer R22 is adjusted until it provides a signal equal to the signal from unit 12 (when a test sample is used in place of material 4). Variable resistor R25 is then adjusted until the output of A 3 is zero. When the gloss sensing unit is applied to the moving material 4 only signals proportional to variations of the gloss are processed; any signal variations due to environmental contaminants from units 22 and 12 cancel out one another at the differential amplifier A 3 stage.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US81176969A | 1969-04-01 | 1969-04-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1282332A true GB1282332A (en) | 1972-07-19 |
Family
ID=25207520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB01690/70A Expired GB1282332A (en) | 1969-04-01 | 1970-03-11 | Improvements in or relating to gloss sensing units |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2014295A1 (en) |
| GB (1) | GB1282332A (en) |
| SE (1) | SE349151B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2023126A1 (en) * | 2007-07-27 | 2009-02-11 | Voith Patent GmbH | Gloss sensor for a paper machine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2966869B2 (en) * | 1988-10-14 | 1999-10-25 | ビク ガードナー ゲーエムベーハー | Gloss measuring device and method |
-
1970
- 1970-03-11 GB GB01690/70A patent/GB1282332A/en not_active Expired
- 1970-03-25 SE SE04125/70A patent/SE349151B/xx unknown
- 1970-03-25 DE DE19702014295 patent/DE2014295A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2023126A1 (en) * | 2007-07-27 | 2009-02-11 | Voith Patent GmbH | Gloss sensor for a paper machine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2014295A1 (en) | 1970-10-15 |
| SE349151B (en) | 1972-09-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |