Electronic Theses and Dissertation

Kaca film mobil merupakan material optik yang berfungsi mengurangi intensitas cahaya masuk serta memberikan perlindungan terhadap radiasi ultraviolet dan termal. Penelitian ini bertujuan menganalisis perubahan intensitas cahaya terpolarisasi yang melewati berbagai jenis kaca film, menganalisis sifat transmisi dan absorpsi terhadap cahaya tampak, ultraviolet, dan inframerah, serta membandingkan hasil pengukuran dengan spesifikasi Visible Light Transmission (VLT) dan indikator optik yang diklaim oleh produsen. Penelitian dilakukan terhadap empat jenis kaca film, yaitu Solar Screen 60%, Solar Gard 60%, Nano Gard 60%, dan 3M 60%, menggunakan laser He-Ne, LED putih, LED ultraviolet, dan LED inframerah sebagai sumber cahaya, pada kondisi ruang terang dan gelap. Data intensitas transmisi dianalisis menggunakan Hukum Malus untuk menentukan karakteristik transmisi dan absorpsi masing-masing sampel. Hasil menunjukkan bahwa perubahan intensitas cahaya pada seluruh sampel secara umum mengikuti kecenderungan Hukum Malus, meskipun terdapat penyimpangan pada sudut analisator besar akibat pengaruh lapisan-lapisan pada sampel. Pada pengujian laser He-Ne, Nano Gard 60% memiliki transmisi terendah dan absorpsi tertinggi, sedangkan pada LED putih perbedaan transmisi antar sampel relatif kecil. Pengujian dengan LED ultraviolet menunjukkan bahwa kaca film mentransmisikan ultraviolet, sedangkan data pada pengujian inframerah tidak diperoleh karena keterbatasan sensitivitas sistem deteksi. Pengukuran dengan laser He-Ne menunjukkan kesesuaian yang lebih baik terhadap spesifikasi VLT produsen dibandingkan pengukuran dengan LED putih.

Automotive window film is an optical material designed to reduce the intensity of incoming light, protection against ultraviolet radiation, and reduce heat transfer into the vehicle. This study aims to analyze changes in the intensity of polarized light passing through various types of automotive window film, analyze the transmission and absorption characteristics of visible, ultraviolet, and infrared light, and compare the measurement results with Visible Light Transmission (VLT) specifications and optical indicators claimed by the manufacturers. The study was conducted on four brand types of window film, i.e., Solar Screen 60%, Solar Gard 60%, Nano Gard 60%, and 3M 60%, using a He-Ne laser, white LED, ultraviolet LED, and infrared LED as light source, under both well-lit and dark room conditions. The transmitted light intensity data were analyzed based on Malus’s Law to determine the transmission and absorption characteristics of each sample. The results generally followed the trend predicted by Malus’s Law, although deviations were observed at larger analyzer angles due to layering of sampels. In the He-Ne laser tests, Nano Gard 60% exhibited the lowest transmission rate and the highest absorption rate, whereas in the white LED test, the differences in transmission among samples were relatively small. The ultraviolet LED tests indicated that window film samples effectively blocked ultraviolet transmission, whereas no infrared measurement data were obtained due to the limited sensitivity of the detection for brand of window film. Measurements obtained using the He-Ne laser showed better agreement with the manufacturers’ VLT specifications than those obtained using white LED.