Small absolute metal photoelectric coded disk using single-loop gray codes

A small absolute metal photoelectric coded disk using single-loop gray codes belongs to the technical fields of photoelectric measurement, relates to a metal photoelectric coded disk, and aims at resolving the technical problem of providing a small absolute metal photoelectric coded disk using single-loop gray codes. The technical scheme is that the small absolute metal photoelectric coded disk using single-loop gray codes comprises a metal code disk and a metal slit disk, wherein the metal code disk adopts a coding method in single-loop gray code mode, the metal slit disk is evenly divided into n light transmission areas at the 360-degree periphery, the metal code disk is arranged on a spindle and can move along the spindle, and the metal slit disk is fixed. Thus, the small absolute metal photoelectric coded disk using single-loop gray codes is formed.