Pantograf

Pantograf adalah alat yang berfungsi untuk memperbesar atau memperkecil sebuah peta atau gambar. Dengan menggunakan alat ini, seseorang dapat mengubah ukuran peta sesuai dengan ukuran yang diinginkan.

Pada dasarnya, kerja pantograf berdasarkan jajaran genjang. Tiga dari empat sisi jajaran genjang (a, b, dan c) mempunyai skala faktor yang sama. Skala pada ketiga sisi tersebut dapat diubah-ubah sesuai dengan kebutuhan. Atur masing-masing lengan pantograf sesuai skala yang diinginkan. Kemudian letakkan peta yang akan diperbesar di tempat B dan kertas gambar kosong letakkan di tempat gambar A yang sudah dilengkapi pensil. Lalu gerakkan B mengikuti peta asal, melalui kaca pengamat.

Dulunya pantograf amat populer. Alat ini sudah ada sejak tahun 1603 dan berasal dari negeri Roma. Tetapi seiring berkembangnya teknologi, masyarakat mulai beralih pada mesin fotokopi atau scanner.

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