ɪn ˈɑːptɪks, ɐ dᵻfjˈuːsɚ ˈɔːlsoʊ kˈɔːld ɐ lˈaɪt dᵻfjˈuːsɚ ɔːɹ ˈɑːptɪkəl dᵻfjˈuːsɚ ɪz ˌɛni mətˈɪɹiəl ðæt dᵻfjˈuːzᵻz ɔːɹ skˈæɾɚz lˈaɪt ɪn sˌʌm mˈænɚ tə tɹænsmˈɪt sˈɔft lˈaɪt.
In optics, a diffuser (also called a light diffuser or optical diffuser) is any material that diffuses or scatters light in some manner to transmit soft light.