Device to check the setting of the position and orientation of a helmet with respect to the helmet wearer's head
US5534689A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1995 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Jan 25, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0143
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An instrument system to make settings and verify that the pupil of an eye of a wearer of a helmet designed to receive a piece of optoelectronic equipment itself having a pupil truly coincides with the wearer's pupil, wherein the instrument system includes first and second optical devices whose position with respect to the helmet is fixed, and a first screen and a second screen E.sub.1 and E.sub.2, each including a reference-marking test pattern, the position of the helmet with respect to the wearer being accurate only if the image of the wearer's eye through the first optical means and the image through the second optical means, of a target on which the wearer's line of view is fixed, are respectively well-positioned with respect to the test patterns of the screens E.sub.1 and E.sub.2. In the preferred embodiment, the screens E.sub.1 and E.sub.2 are merged into a single screen E through an optical device partially common to the first and second optical devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.