High accuracy data acquisition port for environmental chamber photogrammetry
US6353474B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2000 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | Apr 13, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C11/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved system and method for obtaining photogrammetric measurements which eliminates optical distortions created by thermal gradients on windows that are used to protect the photogrammetry camera. A gate valve is introduced between the window and the wall that opens for a limited time to allow the camera to take measurements of a test article contained within a thermal testing chamber. This limits or eliminates any thermal gradients on the window and improves photogrammetric measurements. With a gate valve the window can be removed entirely, as the gate valve can prevent a thermal gradient from being introduced to the lens of the photogrammetry camera. The improved system is suited for making close-in photogrammetric measures of test articles on earth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.