Optical design for line generation using microlens array
US8946594B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2012 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Aug 24, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L24/80
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Embodiments of the invention provide an apparatus including a substrate support, a source of laser radiation emitting laser radiation along an optical path, and an illumination optics disposed along the optical path. The illumination optics includes a set of slow-axis and fast-axis lenses. The apparatus further includes a homogenizer disposed between of the illumination optics and the substrate support along the optical path. The homogenizer includes a first and a second micro-optic lenslet arrays of cylindrical lenses, wherein the second micro-optic lenslet array of cylindrical lenses has a relatively larger lenslet pitch than that of the first micro-optic lenslet array of cylindrical lenses, and lenslet axes of the first micro-optic lenslet array and lenslet axes of the second micro-optic lenslet array are oriented along an axis that is parallel to a fast axis of the source of laser radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.