Flat window tube caps are TO56, TO56, TO 46, TO 38, TO 39, TO33, TO18, TO23, TO9, TO8 ... Light window material: quartz, sapphire, conventional ratio, filter ... Can be customized according to customer requirements A variety of bands to choose from. Transmittance: T> 99.5%, T = 50%, R = 50%, T = 65%, R = 35%, etc.
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