The DVD used in this work has a grating interval of 710 nm ± 19 nm. Zhang et al. eradicated the usage of a focusing lens as a spectrometer component by using a custom-designed Fresnel lens, termed a G-Fresnel, for both focusing and dispersing mild . The G-Fresnel element was fabricated by sandwiching the corresponding unfavorable PDMS molds of each a grating and a Fresnel lens.
The Manufacturing Course Of
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