Diffraction-limited optical target system with continuously-variable virtual distance
US12028509B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2023 |
| Grant date | Jul 2, 2024 |
| Priority date | — |
| Expiry date | Dec 20, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical target system for a device under test disposed in an optical path, the optical target system including a pupil, a lens system and a target configured to be adjustable in position along the optical path such that the object distance of the target with respect to the lens system, is adjustable, the lens system is disposed between the pupil and the target along the optical path, wherein a first virtual image cast behind the target is of a first size when the target is disposed at a first position along the optical path, a second virtual image cast behind the target is of a second size when the target is disposed at a second position along the optical path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.