The optics and performance test of the 45 degrees film structure with glass cover are described. The test results show that the transparency of this composition is higher than that of other honeycomb and V-corrugated structures, the relation of] Nu and Ra these structures are briefly introduced to verify their effect of suppressing natural convective heat loss. In a word, 45 degrees film structure has a better intergral synchronizing total effect, including transparency and suppressing natural convective he...