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.
If you want to play with any of these lens descriptions (or look at code for simulating them), I made a free and open source visual web UI for lens design. The default project when you visit it is a double gauss lens similar to the one shown in the article.
Is there a framework or template base for these kind of (usually scientific) demonstration apps? It’s a common design language of inputs and output that I’ve seen in many pages, often self-explanatory. I like it.
alexbock · 5h ago
Thanks. I did not use any frameworks/libraries/dependencies for this project. It's vanilla JavaScript/HTML/CSS from scratch. The general concept of a spreadsheet-like data editor next to a visual view is a standard paradigm in commercial lens design software like Quadoa/OSLO/CODE V.
turnsout · 1h ago
I absolutely love this, and the development philosophy. Nice work!
Rotundo · 7h ago
Took a look and I'm impressed how easy it is to use. Thanks for sharing this.
librasteve · 6h ago
amazing tool - thanks for sharing
joshvm · 7h ago
I always wanted to play with Optica for Mathematica. It seems like a problem that would lend itself really well to the Wolfram way of visual + functional programming. However I've never met anyone who uses it and while academics usually get Mathematica for free, the plugin is pricey.
I remember playing around with a lenses and light sources simulator, but can’t find the link :-(
If I’m not mistaken it was posted here on HN but couldn’t find it by searching with various related keywords.
If anyone has it please share :-)
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://alexbock.github.io/open-optical-designer/
https://www.opticasoft.com/tour
https://www.opticasoft.com/copy-of-lenslab
https://victorpoughon.github.io/torchlensmaker/