Alfred Lewin Copley (1910–1992) was a German-American medical scientist and an artist at the New York School in the 1950s. As an artist he worked under the name L. Alcopley. He is best known as an artist for his abstract expressionist paintings, and as a scientist for his work in the field of hemorheology. He was married to the Icelandic artist Nína Tryggvadóttir.