>Who this guide is NOT for: [...] People that are okay with becoming a lens design zombie. https://web.archive.org/web/20230914035459/https://caoyuan.scripts.m

>Who this guide is NOT for: [...] People that are okay with becoming a lens design zombie. https://web.archive.org/web/20230914035459/https://caoyuan.scripts.mit.edu/ir_spec.html https://web.archive.org/web/20230914035459/https://caoyuan.s... A $500 DIY near-IR spectrometer that would sell for $10,000, Yuan Cao >The placement of the cylindrical lens (position & angle) affects the focal point for different wavelength. I did not do a rigorous calculation here —— I simply resorted to a trial-and-error method to figure out the optimal placement. https://news.ycombinator.com/item?id=37498142 https://news.ycombinator.com/item?id=37498142