- Design of freeform mirrors in Czerny-Turner spectrometers to suppress astigmatismLi Xu
State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, 100084, Beijing, China
Appl Opt 48:2871-9. 2009..A design example is presented with optimized parameters. The ray-tracing result has revealed a reduction in sagittal spot size from several hundred micrometers to around 10 microm in the wavelength range from 200 nm to 800 nm...
- Resolution enhancement by combination of subpixel and deconvolution in miniature spectrometersLi Xu
State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing, China
Appl Opt 46:3210-4. 2007..The method introduces subpixel reconstruction to overcome undersampling during deconvolution processing. The experimental result has shown a 36.6% reduction in FWHM of spectral lines, indicating the effectiveness of the method...