Scientists claim to have found colour no one has seen before

echoangle · 2025-04-19T12:52:27 1745067147

So basically, the sensitivity curves of the receptors in the eye overlap ( https://commons.m.wikimedia.org/wiki/File:Cone-fundamentals-... ) so a signal can’t excite a single type of receptor, but they did it by using a focused laser to exclusively target the one type of receptor?

perihelions · 2025-04-19T12:57:08 1745067428

Right!

perihelions · 2025-04-19T12:52:47 1745067167

This is fascinating. I didn't realize there are so few cone cells, that you can step through literally *all* of them with a digital controller.

- "These laser microdoses are delivered at a rate of 10⁵ per second to a population of 10³ cones[...] individually fiber-coupled acousto-optic modulator that can modulate laser intensity up to 50 MHz[...] This laser spot is scanned in a raster pattern over a 0.9° square field of view using orthogonally oriented resonant and galvo mirrors, with a frame resolution of 512 × 256 pixels and a frame rate of 60 Hz..."

https://www.science.org/doi/10.1126/sciadv.adu1052

Kaibeezy · 2025-04-19T12:48:16 1745066896

Original paper here - https://news.ycombinator.com/item?id=43734141

patrickmay · 2025-04-19T12:53:39 1745067219

Octarine?

etiam · 2025-04-19T13:01:25 1745067685

I think they'd have to hit a different part of the CNS for that. :)

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