| abstract |
A manufacturing method for manufacturing a transmissive optical element using a thermoplastic resin film. This manufacturing method includes: a hot pressing process, by hot pressing a thermoplastic resin film by at least a pair of flat molds, to obtain a hot pressed film; a mold cooling process, cooling a pair of flat molds to the glass transition temperature (Tg) of the aforementioned thermoplastic resin film r ) The temperature below ℃ to cool the hot-pressed film; and the demolding process, after the mold cooling process, when the hot-pressed film is released from a pair of flat molds, the hot-pressed film is released while applying tension to A formed film containing a plurality of transmissive optical elements was obtained. |