Because we want to illuminate the sample pixel by pixel. We can stimulate different worm with different wavelength and intensity light in one view. Finally, we can consturect a maze with bule and red light. C. elegans will will move based on the pattern.
The projector can form a local, dynamicaly, multi-color pattern in slide. 2
We replace the oring lens with longer force distance lens to resize the image into microscope. The addtional red and blue filter are added after LCD.
We also develop a software to control the pattern on slide. The softeare is coded by PYthon, Qt5 and other package. It have been on different platform, windows and ArchLinux.
Yes, we have tested the projector light source. You can see that, we just pull the our picture into microscope. Then we play on movie, we can see these.
Yes, other companys have devloped similar device. But our light modulator has shorter deleying time and dual-wavelength choice for projectoring pattern. Plus, this haredware and software are open source and cheap. Everyone can build this light modulator by themselves according to our guidebook.