Positioning device
US4668095A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1984 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Oct 23, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K13/0812
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A positioning device employing a single image pick-up device whereby two objects can be accurately aligned irrespective of inaccuracies in the pick-up device. The positioning device includes as a primary element an optical device composed of two prisms joined at oblique surfaces with a half-silvered mirror surface therebetween. The objects to be aligned are positioned adjacent first side surfaces of corresponding ones of the two prisms. A totally reflecting coating is provided on a second side surface of one of the two prisms, and an image pick-up device, namely, a video camera, is disposed to receive light emanating from the parallel second side surface of the other one of the two prisms. Alignment is effected in accordance with the output signal from the video camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.