ɪnðə kˈoːɹs ʌv ˈeɪt jˈɪɹz ʌv ˈæftɚɹˈaʊɚz ɛkspˌɛɹɪməntˈeɪʃən, stˈiːnblɪk kɹiːˈeɪɾᵻd plˈæstɪk pɹˈɪzəmz, ɡlˈæs dˈʌbəl pɹˈɪzəmz, fɹˈɛsnəl pɹˈɪzəmz, ænd lˈɪkwɪd ˈɑːptɪks jˈuːzɪŋ ɡlˈɪsɚɹˌɪn ænd tʃaɪnˈiːz sˈɪnəmən ˈɔɪl hˈɛld ɪn wˈɛdʒʃˈeɪpt ɡlˈæs sˈɛlz.
In the course of eight years of after-hours experimentation, Steenblik created plastic prisms, glass double prisms, Fresnel prisms, and liquid optics using glycerin and Chinese cinnamon oil held in wedge-shaped glass cells.