JPS6443703A - Method and device for measuring distance - Google Patents
Method and device for measuring distanceInfo
- Publication number
- JPS6443703A JPS6443703A JP20035787A JP20035787A JPS6443703A JP S6443703 A JPS6443703 A JP S6443703A JP 20035787 A JP20035787 A JP 20035787A JP 20035787 A JP20035787 A JP 20035787A JP S6443703 A JPS6443703 A JP S6443703A
- Authority
- JP
- Japan
- Prior art keywords
- luminous flux
- optical path
- laser
- wavelength
- peaks
- 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.)
- Pending
Links
Landscapes
- Instruments For Measurement Of Length By Optical Means (AREA)
Abstract
PURPOSE:To measure a distance without moving an objective (mirror) by scanning the wavelength of luminous flux so that a signal outputted by a light receiving element has at least two peaks. CONSTITUTION:When the wavelength of laser luminous flux is varied by increasing a driving current supplied to a semiconductor laser 21 by a driving circuit 22, light and shade (light when the optical path difference between the length l0 of a reference optical path 25 and the length l1 of a measurement optical path 27 is an integral multiple of lambda/2 and shade when an odd multiple of #/4) are formed on the light receiving element 30 by the interference between two pieces of luminous flux split by a half-mirror 24. Here, the reciprocal optical path length (l) from an origin 0 to a corner cube prism 28 is found from a specific expression by using the values l0 and l1 and respective wavelengths of laser luminous flux when a 1st and next peaks of the signal outputted by the element 30 appear. Therefore, the prism 28 is not moved, the wavelength of the luminous flux emitted by the laser 21 is scanned, and two wavelengths when the signal from the element has the peaks are found to measure the distance from the origin 0 to the prism 28.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20035787A JPS6443703A (en) | 1987-08-11 | 1987-08-11 | Method and device for measuring distance |
| US07/225,118 US4973153A (en) | 1987-07-29 | 1988-07-28 | Method and apparatus for finding range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20035787A JPS6443703A (en) | 1987-08-11 | 1987-08-11 | Method and device for measuring distance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6443703A true JPS6443703A (en) | 1989-02-16 |
Family
ID=16422954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20035787A Pending JPS6443703A (en) | 1987-07-29 | 1987-08-11 | Method and device for measuring distance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6443703A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010127885A (en) * | 2008-12-01 | 2010-06-10 | Mitsutoyo Corp | Laser interferometer |
| CN109631767A (en) * | 2018-12-12 | 2019-04-16 | 上海卫星装备研究所 | Range unit and distance measuring method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5533649A (en) * | 1978-08-30 | 1980-03-08 | Ishida Scales Mfg Co Ltd | Vibration control of electromagnetic vibration type feeder |
-
1987
- 1987-08-11 JP JP20035787A patent/JPS6443703A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5533649A (en) * | 1978-08-30 | 1980-03-08 | Ishida Scales Mfg Co Ltd | Vibration control of electromagnetic vibration type feeder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010127885A (en) * | 2008-12-01 | 2010-06-10 | Mitsutoyo Corp | Laser interferometer |
| CN109631767A (en) * | 2018-12-12 | 2019-04-16 | 上海卫星装备研究所 | Range unit and distance measuring method |
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