Nicol Prism Polarizer and Analyser, English, c.1875-1900

A Nicol prism sub stage polarizer and nosepiece analyser. The nosepiece features a prism set in a cork mount which is housed in a copper alloy body. Two threaded dust caps fit either end of the body. The prism itself rotates within the body via a bevelled edge accessed by two cutaway sections in the side of the body.

The sub stage polarizer consists of a prism set in a cork mount which is housed in a copper alloy body. The prism rotates freely within a tube shaped sub stage attachment.