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Lilense tsa Optical tse putsoa tse sehiloeng ka halofo tse 1.56
Lilense tse fetolang mebala li fifala ha letsatsi le chaba. Ha mabone a fela, a khanya hape. Sena sea khoneha hobane likristale tsa halide ea silevera lia sebetsa.
Tlas'a maemo a tloaelehileng, e boloka lilense li bonaletsa hantle. Ha li pepesehetse khanya ea letsatsi, silevera e ka har'a kristale ea aroloa, 'me silevera e lokolohileng e etsa lihlopha tse nyane ka har'a lense. Lihlopha tsena tse nyane tsa silevera ke lihlopha tse sa tloaelehang, tse hokahaneng tse ke keng tsa fetisa leseli empa li le monya, li fifatsa lense ka lebaka leo. Ha leseli le le tlase, kristale ea fetoha 'me lense e khutlela boemong ba eona bo khanyang.
