An improved transmitting multi-layer thin-film filter

Zhang Ying^a),^b), Qi Hong-Ji^a), Yi Kui^a), Wang Yan-Zhi^a), Sui Zhan^c), Shao Jian-Da^a)†

Transmission spectra of (a) short wave-pass, (b) long wave-pass, and (c) cutoff filter-combination filters.