GB1070945A - Improvements in or relating to devices for measurement of filament thickness - Google Patents
Improvements in or relating to devices for measurement of filament thicknessInfo
- Publication number
- GB1070945A GB1070945A GB2701164A GB2701164A GB1070945A GB 1070945 A GB1070945 A GB 1070945A GB 2701164 A GB2701164 A GB 2701164A GB 2701164 A GB2701164 A GB 2701164A GB 1070945 A GB1070945 A GB 1070945A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filament
- timing
- test object
- photo
- light
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
1,070,945. Photo-electric measuring apparatus. ROLLS ROYCE Ltd. June 30, 1964, No. 27011/64. Heading G1A. Apparatus for measuring the size of a filament, thread or rope comprises a support for the test object, means for illuminating it, a rotating reflector and photo-electric detector scanning the shadow pattern caused by the object and timing means determining the time between a point on the first dark-going slope of the cell output and a point on a subsequent light-going slope. The arrangement shown comprises a support 2 between the ends of which is mounted a drawn fused silica filament 1. The filament holder may be raised or lowered by means of knob 8 to investigate different parts of its length. It is also possible to move the filament holder and its guide and support means by rotation of handwheels 18 and 19 to position the portion of the filament under test at the focus of the inspection system. A light projection arrangement comprising a source 10 and optical system 11 illuminates the filament and light not obstructed or otherwise directed out of the system by the test object passes through projection lens 12 to mirror 15 mounted for rotation on a heavy flywheel 16 and driven by synchronous motor 17. The single mirror 15 may be replaced by a multi-faced reflector assembly to increase the scan frequency. The scanned shadow of the filament is focused on a narrow slit 13 in front of photo-electric detector 14 which may be a photo-multiplier. The timing circuit Fig. 3 (not shown) includes a manual switch settable to choose a point on the next light-going slope of the cell output after the commencement of timing to terminate timing if the test object is opaque and to select a point on the second following light-going slope if the test object is transparent. Timing may be effected by using a cathode-ray tube display incorporating timing markers or by counting clock pulses and displaying the count made in the preceding scanning cycle. The apparatus may be modified to view a continuously travelling test object.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2701164A GB1070945A (en) | 1964-06-30 | 1964-06-30 | Improvements in or relating to devices for measurement of filament thickness |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2701164A GB1070945A (en) | 1964-06-30 | 1964-06-30 | Improvements in or relating to devices for measurement of filament thickness |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1070945A true GB1070945A (en) | 1967-06-07 |
Family
ID=10252735
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2701164A Expired GB1070945A (en) | 1964-06-30 | 1964-06-30 | Improvements in or relating to devices for measurement of filament thickness |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1070945A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2336660A1 (en) * | 1975-12-22 | 1977-07-22 | Monsanto Co | OPTICAL THICKNESS MEASUREMENT GAUGE |
-
1964
- 1964-06-30 GB GB2701164A patent/GB1070945A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2336660A1 (en) * | 1975-12-22 | 1977-07-22 | Monsanto Co | OPTICAL THICKNESS MEASUREMENT GAUGE |
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