Projection device and projection system including the same
US11435562B2 · kind B2 · utility
0Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2019 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Nov 13, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B19/0061
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for projecting a test pattern for evaluating the image-capturing properties of a lens module includes a light emitting assembly. The light emitting assembly includes a light emitter and a patterning plate on the light emitter. The patterning plate includes a first surface facing the light emitter and a second surface opposite to the first surface. The second surface is concave and defines a patterning groove. The light from the light emitter passes through the patterning groove to form an original pattern for testing, the display of a test pattern being instantly selectable and displayable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.