51. Improved spatial resolution of luminescence images acquired with a silicon line scanning camera
- Author
-
Anthony Teal, Mattias K. Juhl, and Bernhard Mitchell
- Subjects
010302 applied physics ,Point spread function ,Materials science ,Silicon ,business.industry ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,General Physics and Astronomy ,chemistry.chemical_element ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Chip ,01 natural sciences ,Light scattering ,Optics ,chemistry ,Optical transfer function ,0103 physical sciences ,Deconvolution ,Image sensor ,0210 nano-technology ,business ,Image resolution - Abstract
Luminescence imaging is currently being used to provide spatially resolved defect in high volume silicon solar cell production. One option to obtain the high throughput required for on the fly detection is the use a silicon line scan cameras. However, when using a silicon based camera, the spatial resolution is reduced as a result of the weakly absorbed light scattering within the camera's chip. This paper address this issue by applying deconvolution from a measured point spread function. This paper extends the methods for determining the point spread function of a silicon area camera to a line scan camera with charge transfer. The improvement in resolution is quantified in the Fourier domain and in spatial domain on an image of a multicrystalline silicon brick. It is found that light spreading beyond the active sensor area is significant in line scan sensors, but can be corrected for through normalization of the point spread function. The application of this method improves the raw data, allowing effecti...
- Published
- 2018