JPS5459166A - Visual sensibility measuring apparatus of interferometer - Google Patents
Visual sensibility measuring apparatus of interferometerInfo
- Publication number
- JPS5459166A JPS5459166A JP12696377A JP12696377A JPS5459166A JP S5459166 A JPS5459166 A JP S5459166A JP 12696377 A JP12696377 A JP 12696377A JP 12696377 A JP12696377 A JP 12696377A JP S5459166 A JPS5459166 A JP S5459166A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- frequency
- interference fringe
- reference pulse
- mirror
- 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.)
- Granted
Links
Landscapes
- Instruments For Measurement Of Length By Optical Means (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
PURPOSE: To achieve the improvement in measurement accuracy and reliability by controlling interference fringe scanning speeds and making the output frequency of a photoelectric transducer corresponding to the brightness and darkness of interference fringe constant.
CONSTITUTION: Laser light from a light source 1 forms an interference fringe by becoming two sets of rays which go through a beam splitter 3, reflecting mirror 6, reflecting mirror 8 provided on a movable base 8, etc. This inteference fringe is scanned by a turning mirror 12 and is detected by a photoelectric transducer 15, from which it is passed through a zero crossing detecting differentiation circuit 16 and a pulse generator 17, which in turn generates pulses at the maximum and minimum of the detection signal. These pulses are applied together with the reference pulse of a reference pulse generating circuit 19 to a difference frequency detection circuit 20. Hence, the scanning speed of the mirror 12 through the circuit 21 is controlled to a constant value according to the frequency of the reference pulse of the circuit 19 and the detection signal of the transducer 15 becomes a constant frequency. As a result, the measurement of high accuracy and high reliability free from the inclination and optical path difference of the beam spliiter 3, reflecting mirrors 6, 8 and the decrease owing to the change in background light may be per formed
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12696377A JPS5942819B2 (en) | 1977-10-19 | 1977-10-19 | Interferometer visibility measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12696377A JPS5942819B2 (en) | 1977-10-19 | 1977-10-19 | Interferometer visibility measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5459166A true JPS5459166A (en) | 1979-05-12 |
| JPS5942819B2 JPS5942819B2 (en) | 1984-10-17 |
Family
ID=14948221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12696377A Expired JPS5942819B2 (en) | 1977-10-19 | 1977-10-19 | Interferometer visibility measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5942819B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872756A (en) * | 1985-10-17 | 1989-10-10 | Pilkington Brothers Plc | Dual path interferometer with varying difference in path length |
| JP2015504167A (en) * | 2012-01-17 | 2015-02-05 | フェムトレーザース プロドゥクシオンズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Apparatus and method for optical inspection of samples |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3558189B1 (en) | 2016-12-20 | 2021-06-23 | The Procter & Gamble Company | Methods and apparatuses for making elastomeric laminates with elastic strands provided with a spin finish |
| US11147718B2 (en) | 2017-09-01 | 2021-10-19 | The Procter & Gamble Company | Beamed elastomeric laminate structure, fit, and texture |
| US11547613B2 (en) | 2017-12-05 | 2023-01-10 | The Procter & Gamble Company | Stretch laminate with beamed elastics and formed nonwoven layer |
-
1977
- 1977-10-19 JP JP12696377A patent/JPS5942819B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872756A (en) * | 1985-10-17 | 1989-10-10 | Pilkington Brothers Plc | Dual path interferometer with varying difference in path length |
| EP0449335A2 (en) * | 1985-10-17 | 1991-10-02 | Pilkington Plc | Interferometer |
| JP2015504167A (en) * | 2012-01-17 | 2015-02-05 | フェムトレーザース プロドゥクシオンズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Apparatus and method for optical inspection of samples |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5942819B2 (en) | 1984-10-17 |
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