Distance measuring device
US5541723A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1994 |
| Grant date | Jul 30, 1996 |
| Priority date | — |
| Expiry date | Jun 17, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/87
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A distance measuring device according to the present invention includes a light projector, a controller, and a light receiver. The light projector projects light toward an object to be measured, and the controller controls the light projector to carry out a first light projection to emit a first light at a predetermined angle with a first light distribution, and subsequently to carry out a second light projection to emit a second light at the predetermined angle with a second light distribution which is different from the first light distribution. The light receiver receives the first and second light emitted by the light projector and reflected from the object, and produces light reception signals, and a circuit arrangement calculates a distance to the object by means of the light reception signals. With the invention, by projecting multiple distance measuring beams of light having different luminous intensity distributions toward a certain distance measurement point of the object at different times and calculating the object distance based on the output from the light receiver means which is obtained as a result of the projections, correct object distance information can be obtai…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.