The future isn't all that bad when it comes to multispectral multipixel sensors. As for this project: it has been a great journey and inspiration. The new frontier these days is, at least for me, in the short-wave infrared (900-2500 nm), where it becomes ever harder to piece something together with a few photodiodes or LEDs.

Here's to more compact, affordable single-pixel spectrometers, intriguing analog front-end, CCD learning experiences and ubiquitous multispectral imaging, far beyond what The Optical Inch initially set out to do.

Let's enjoy the adorable MEMS Fabry-Pérot interferometer for SWIR spectroscopy, low-cost 10+ channel spectral profiling sensors and lastly the absolutely cool computational approach below that reconstructs spectra based on the responses of definitely-not-narrowband dielectric filters.

Tune in next time when there is a next time! Stay curious.

https://www.hamamatsu.com/us/en/product/optical-sensors/spectrometers/mems-fpi-spectrum-sensor/C13272-03.html

Kim, C., Ni, P., Lee, K.R. et al. Mass production-enabled computational spectrometers based on multilayer thin films. Sci Rep 12, 4053 (2022). https://doi.org/10.1038/s41598-022-08037-y