Dynamic intensity-modulated segmentation method for orthogonal double-layer grating device
US12029919B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2019 |
| Grant date | Jul 9, 2024 |
| Priority date | — |
| Expiry date | Jun 16, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K1/067
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention discloses a dynamic intensity-modulated segmentation method for an orthogonal double-layer grating blade device. The core of the segmentation algorithm is to construct a virtual single-layer grating after the velocities of the two-layer gratings are synthesized to perform dynamic intensity modulation of the single-layer grating (sliding-window) segmentation, and finally use two layers of gratings to conform to each segment. In order to reduce the segmentation error, the invention provides two optimization methods: blade motion trajectory optimization method and segment weight optimization method. The blade motion trajectory optimization method is to optimize the objective function under certain constraints with the motion trajectory of each blade as a variable under the condition that the segment weight is fixed. Segment weight optimization method is to optimize the time points of each segment when the blade motion trajectory is fixed. Both of the two optimization methods can reduce the error of the segmentation intensity and improve the optimization effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.