GB1254958A - Checking variations in the diameter of a fibre - Google Patents
Checking variations in the diameter of a fibreInfo
- Publication number
- GB1254958A GB1254958A GB3124669A GB3124669A GB1254958A GB 1254958 A GB1254958 A GB 1254958A GB 3124669 A GB3124669 A GB 3124669A GB 3124669 A GB3124669 A GB 3124669A GB 1254958 A GB1254958 A GB 1254958A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photo
- fibre
- cell
- diaphragm
- variations
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
- B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
- B65H63/062—Electronic slub detector
- B65H63/065—Electronic slub detector using photo-electric sensing means, i.e. the defect signal is a variation of light energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Quality & Reliability (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
1,254,958. Monitoring the diameter of fibres. PHILIPS ELECTRONIC AND ASSOCIATED INDUSTRIES Ltd. June 20, 1969 [June 21, 1968], No. 31246/69. Heading G1A. In a method of checking variations in the diameter of a fibre being drawn, the radiation from a source 2 is divided into two parts of which the first part intercepted by the fibre is subsequently incident on a photo-electric cell 4 connected in a circuit whose output is related to the said variations, the second part of the flux from the source bing used to derive a reference signal. As shown, radiation from a tungsten filament lamp 2 is collimated by a lens 3 and split by a halfsilvered mirror 8. The fibre 1 is passed continuously through the first beam part which is focused by an objective lens 5 on to a silicon photo-cell 4. Located in front of the photo-cell are a diaphragm 6 and a diffusing screen 11. A diaphragm 10 ensures that a constant length of the fibre is monitored. The second part of the divided beam is stopped down by an adjustable slit diaphragm 9 and falls on a second silicon photo-cell 7. The difference current i 4 -i 7 from the two photo-cells is fed to a meter M, which records the variations in this difference current. A control arrangement may be provided to stop, or modify the conditions of the fibre drawing operation. In a further embodiment, Fig. 4 (not shown) the second or reference beams, after reflection from the beam-splitter 8, is reflected parallel to the measuring beam by a plane mirror and passes through a reference fibre parallel to the first. This reference beam is focused on to a second photo-cell, and the two photo-cell signals are subtracted as before. In the embodiment shown in Fig. 5, light from a source 2 is focused on to a diaphragm 16 through an opal glass 15 and is then collinated by a lens 17. Two resultant beams are produced by a diaphragm 18 having two adjustable apertures. These beams pass through the transparent tubular fibres 1 and 1a and are focused on to a photo-cell 14. A rotating sectored disc 9 with staggered slots or a polarizing disc associated with two crossed polarizers in each of the beams is utilized so that the two radiation paths are alternately incident on the photo-cell, the AC component of whose output is amplified by an amplifier 12 and rectified by a synchronous detector 13 whose output indicates the variations in diameter of the test fibre. The DC component of the photocell output may be used to regulate the source intensity. In all the above embodiments the fibres may be contained in a liquid whose refractive index is substantially equal to that of the fibres.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR156100 | 1968-06-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1254958A true GB1254958A (en) | 1971-11-24 |
Family
ID=8651496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3124669A Expired GB1254958A (en) | 1968-06-21 | 1969-06-20 | Checking variations in the diameter of a fibre |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE734862A (en) |
DE (1) | DE1931555A1 (en) |
FR (1) | FR1590632A (en) |
GB (1) | GB1254958A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2124760A (en) * | 1982-08-05 | 1984-02-22 | Electricity Council | Temperature of elongate articles |
WO2009043714A1 (en) * | 2007-09-28 | 2009-04-09 | Hochschule Niederrhein | Method and assembly for determining the diameter of a running thread |
CN117433747A (en) * | 2023-12-11 | 2024-01-23 | 中国电子科技集团公司第四十六研究所 | Active optical fiber absorption coefficient testing device and testing method |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH611017A5 (en) * | 1976-05-05 | 1979-05-15 | Zumbach Electronic Ag | |
JPS5311039A (en) * | 1976-07-19 | 1978-02-01 | Hitachi Ltd | Controller of diameter of optical fiber |
US4102661A (en) * | 1977-03-03 | 1978-07-25 | Bell Telephone Laboratories, Incorporated | Caustic ray use of the drawdown zone of an optical fiber preform to control the drawing of the fiber |
DE2750109C2 (en) * | 1977-11-09 | 1991-03-07 | Spindler & Hoyer GmbH & Co, 3400 Göttingen | Device for non-contact measurement of linear distances, in particular the diameter |
DE3112026C2 (en) * | 1981-03-26 | 1985-10-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Device for measuring the position and movement of an oscillatable body |
CS240116B1 (en) * | 1983-07-14 | 1986-02-13 | Ludek Vodicka | Method of flexible quartz chromatographic columns production and equipment for performance of this method |
EP0294889A1 (en) * | 1987-06-10 | 1988-12-14 | Koninklijke Philips Electronics N.V. | Device for performing measurement of a transparent object, method of manufacturing a fibre, and fibre manufactured by means of said method |
FR2670883B1 (en) * | 1990-12-21 | 1994-03-18 | Alcatel Fibres Optiques | DEVICE FOR DETECTING IRREGULARITIES IN THE DIAMETER OF A WIRE. |
US5383021A (en) * | 1993-04-19 | 1995-01-17 | Mectron Engineering Company | Optical part inspection system |
-
1968
- 1968-06-21 FR FR1590632D patent/FR1590632A/fr not_active Expired
-
1969
- 1969-06-19 BE BE734862D patent/BE734862A/xx unknown
- 1969-06-20 GB GB3124669A patent/GB1254958A/en not_active Expired
- 1969-06-21 DE DE19691931555 patent/DE1931555A1/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2124760A (en) * | 1982-08-05 | 1984-02-22 | Electricity Council | Temperature of elongate articles |
WO2009043714A1 (en) * | 2007-09-28 | 2009-04-09 | Hochschule Niederrhein | Method and assembly for determining the diameter of a running thread |
CN117433747A (en) * | 2023-12-11 | 2024-01-23 | 中国电子科技集团公司第四十六研究所 | Active optical fiber absorption coefficient testing device and testing method |
Also Published As
Publication number | Publication date |
---|---|
DE1931555A1 (en) | 1970-02-05 |
FR1590632A (en) | 1970-04-20 |
BE734862A (en) | 1969-12-19 |
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