Distance measuring equipment and camera
US6345153B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2000 |
| Grant date | Feb 5, 2002 |
| Priority date | — |
| Expiry date | Jul 27, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There are disclosed a distance measuring equipment capable of performing a distance measurement with greater accuracy suppressing cost up, and a camera. In case of the short distance area and the middle distance area, switches 61 and 62 are set up to the turn-off state, and switch 63 is set up to take the contact 63a side, so that photo-current signals I1 and I2 from PSD 30 are fed to input terminals 41 and 42 to perform a usual ratio arithmetic processing. In case of the long distance area, the switches 61 and 62 are set up to the turn-off state and the turn-on state, respectively, and the switch 63 is set up to take the contact 63b side, so that photo-current signal the I1 and fixed current signal Ir are fed to the input terminals 41 and 42 to perform a ratio arithmetic processing based on the fixed current signal. In case of the longest distance area, the switches 61 and 62 are set up to the turn-on state and the turn-off state, respectively, and the switch 63 is set up to take the contact 63b side to form a first signal transmission path, so that an addition value of the photo-current signals I1 and I2 and the fixed current signal Ir are fed to the input terminals 41 and 42 to …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.