Carpenter and Westley were a British optical, mathematical and scientific instrument makers between 1808 and 1914. The company was founded by Philip Carpenter (18 November 1776, Kidderminster – 20 April 1833, London) and, after his death, was continued by his sister Mary Carpenter alongside former apprentice William Westley. The company's contribution to the development of magic lanterns was significant and Philip Carpenter pioneered the use of copperplate slides.