A series of nearinfrared polymethine dyes have been synthesized. Some of these dyes were used in infrared photography, dye lasers and optical recording medium.
Such near-infrared techniques used in photography give subjects an exotic, antique look.
如近红外技术用于摄影给予科目的异国情调，古典的外观。
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This paper outlines characteristics of near-infrared direct photography and imaging by infraredscanning system, and their practical use in aerial reconnaissance.