Light irradiation device having two wedge prisms and an aberration correction surface
US11982927B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2018 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Jul 21, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2205/003
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light irradiation device includes a light source, a projection optical system, wedge prisms, and an aberration correction surface. The projection optical system projects an image formed based on light emitted from the light source. The aberration correction surface corrects an aberration occurring when the image is projected by the projection optical system. The wedge prism deflects the light emitted from the projection optical system. The wedge prism deflects the light deflected by the wedge prism. The wedge prisms are held so that a deflection direction of light emitted from the wedge prism is changed by rotation of at least one of the wedge prisms. The aberration correction surface is on the wedge prism side with respect to an emission surface of the projection optical system, and is located on the projection optical system side, with respect to the wedge prism, including an incidence surface of the wedge prism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.