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 · 6h 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 · 2h ago
I absolutely love this, and the development philosophy. Nice work!
Rotundo · 9h ago
Took a look and I'm impressed how easy it is to use. Thanks for sharing this.
librasteve · 8h ago
amazing tool - thanks for sharing
joshvm · 9h 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.
Hey thanks for posting this, I met Dr Barnhart and his slide-o-scope at Makerspace Urbana some 15 years ago now and was just trying to remember what his software did the other day. One of those synchronicities, glad to see it's still selling. Looks like there's a pared down hobbyist version for less than 200 bucks but can't tell if it's also a Wolfram plug-in or standalone modeling software; I'll have to send the old man an email
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://www.opticasoft.com/product-page/optica-em-for-experi...
https://victorpoughon.github.io/torchlensmaker/