This chapter entails the sourcing of the slit for FINCH Eye Build II.
https://www.thomasnet.com/suppliers/usa/slits-75940502
https://www.knightoptical.com/stock/default/apertures-iris-diaphragms/apertures/slits.html
https://www.comaroptics.com/components/optomechanics/apertures/standard-apertures/standard-series-slits
https://www.comaroptics.com/components/optomechanics/apertures/precision-apertures/precision-slits
https://lenoxlaser.com/products/optical-apertures/high-power-slits/
https://www.optosigma.com/us_en/precision-optical-air-slits-FSL.html
https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1464