NL7107593A - - Google Patents
Info
- Publication number
- NL7107593A NL7107593A NL7107593A NL7107593A NL7107593A NL 7107593 A NL7107593 A NL 7107593A NL 7107593 A NL7107593 A NL 7107593A NL 7107593 A NL7107593 A NL 7107593A NL 7107593 A NL7107593 A NL 7107593A
- Authority
- NL
- Netherlands
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
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
- G01B9/02055—Reduction or prevention of errors; Testing; Calibration
- G01B9/02056—Passive reduction of errors
- G01B9/02061—Reduction or prevention of effects of tilts or misalignment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
- G01B9/02055—Reduction or prevention of errors; Testing; Calibration
- G01B9/02075—Reduction or prevention of errors; Testing; Calibration of particular errors
- G01B9/02078—Caused by ambiguity
- G01B9/02079—Quadrature detection, i.e. detecting relatively phase-shifted signals
- G01B9/02081—Quadrature detection, i.e. detecting relatively phase-shifted signals simultaneous quadrature detection, e.g. by spatial phase shifting
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US6247970A | 1970-08-10 | 1970-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7107593A true NL7107593A (de) | 1972-02-14 |
Family
ID=22042773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7107593A NL7107593A (de) | 1970-08-10 | 1971-06-02 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE765248A (de) |
| DE (1) | DE2123667A1 (de) |
| FR (1) | FR2117014A5 (de) |
| NL (1) | NL7107593A (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0611438B1 (de) * | 1991-11-08 | 1996-07-03 | British Technology Group Ltd | Optische Messgeräte |
-
1971
- 1971-04-05 FR FR7111945A patent/FR2117014A5/fr not_active Expired
- 1971-04-05 BE BE765248A patent/BE765248A/xx unknown
- 1971-05-13 DE DE19712123667 patent/DE2123667A1/de active Pending
- 1971-06-02 NL NL7107593A patent/NL7107593A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE765248A (fr) | 1971-08-30 |
| DE2123667A1 (de) | 1972-02-17 |
| FR2117014A5 (de) | 1972-07-21 |