Patent · US Active

Test object used for projecting a set of marks to infinity

US8254032B2 · kind B2 · utility

0Cited by

6References

12Claims

0Family size

Assignee

EADS Test and Services · FR

Inventors

Pierre Lecoq · Chaville, FR
Vincent Petit · Paris, FR
Franck Delsol · Arpajon, FR

Key dates

Filing date	Dec 12, 2008
Grant date	Aug 28, 2012
Priority date	—
Expiry date	Dec 12, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG02B27/34
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The collimated test object according to the invention is used for projecting to infinity a set of marks, the positions of which are very accurately known so as to be able to verify the alignment and/or the distortion of optical equipment such as sensors or collimated screens. This test object comprises a plurality of microcollimated sets, each comprising a light source, an elementary test object comprising a mark illuminated by the source as well as a collimation lens for projecting the mark to infinity. With this solution, one gets free of aberration problems to which are subject convention test objects of large dimensions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.