JPS6431007A - Measuring method of incident angle - Google Patents
Measuring method of incident angleInfo
- Publication number
- JPS6431007A JPS6431007A JP18709387A JP18709387A JPS6431007A JP S6431007 A JPS6431007 A JP S6431007A JP 18709387 A JP18709387 A JP 18709387A JP 18709387 A JP18709387 A JP 18709387A JP S6431007 A JPS6431007 A JP S6431007A
- Authority
- JP
- Japan
- Prior art keywords
- reflected
- incident angle
- substance
- diffracted
- measured
- 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
Abstract
PURPOSE:To enable the highly precise measurement of an incident angle of beam on a substance, by a method wherein a diffraction grating is provided on the substance, one of diffracted beams of an incident beam caused by the diffraction grating is reflected, the reflected beam and at least one diffracted beam are made to interface with each other, and the beam intensity of a composite beam thus formed is measured. CONSTITUTION:A reflected beam R is obtained by making a diffracted beam D2 reflected by a reflector 2, and it is made to advance in the same direction with that of another diffracted beam D1 so that the beams D1 and R are made to interfere with each other. The phase of the beam R is delayed by the length of its optical path because of its going through the reflector 2, and a phase delay DELTApsi thereof is determined by a distance to the reflector 2 and a diffraction angle theta. The angle thetais varied in accordance with variation in an incident angle psi, and the incident angle psican be measured by a method wherein the beams R and D1 are made to interfere with each other and the phase delay DELTApsi is introduced into a detector 3 and measured from the variation in the intensity of a composite beam U of said lights. Accordingly, since the diffracted beam is used, the incident angle can be measured with high precision without affecting virtually a beam transmitted directly through a substance 1 and a beam reflected directly on the substance 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18709387A JPS6431007A (en) | 1987-07-27 | 1987-07-27 | Measuring method of incident angle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18709387A JPS6431007A (en) | 1987-07-27 | 1987-07-27 | Measuring method of incident angle |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6431007A true JPS6431007A (en) | 1989-02-01 |
JPH0478925B2 JPH0478925B2 (en) | 1992-12-14 |
Family
ID=16199983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18709387A Granted JPS6431007A (en) | 1987-07-27 | 1987-07-27 | Measuring method of incident angle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6431007A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108885093A (en) * | 2016-03-28 | 2018-11-23 | 沙特阿拉伯石油公司 | System and method for constructing and testing recombination photons structure |
-
1987
- 1987-07-27 JP JP18709387A patent/JPS6431007A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108885093A (en) * | 2016-03-28 | 2018-11-23 | 沙特阿拉伯石油公司 | System and method for constructing and testing recombination photons structure |
CN108885093B (en) * | 2016-03-28 | 2021-02-02 | 沙特阿拉伯石油公司 | System and method for constructing and testing composite photonic structures |
US11099135B2 (en) | 2016-03-28 | 2021-08-24 | Saudi Arabian Oil Company | Systems and methods for constructing and testing composite photonic structures |
Also Published As
Publication number | Publication date |
---|---|
JPH0478925B2 (en) | 1992-12-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |