https://optotl.com/coatings/dalniy-ik-diapazon.php
Filter and beam-splitting coatings for middle IR range
beam splittingfiltercoatingsmiddlerange
https://dspace-test.anu.edu.au/items/a98bac6f-a447-4248-8a62-a72857e01512
Spectral beam splitting for efficient conversion of solar energy - A review
Spectral beam splitting is a promising method to achieve high efficiency solar energy conversion. Its potential applications include multi-junction PV...
beam splittingsolar energyspectralefficientconversion