Patent ID: 7433022

Claim:
An auto level with a laser comprising: a housing; a laser irradiating unit disposed and affixed within said housing and irradiating a laser light; a first right angle prism disposed in the path of said laser light; a focus lens lupe disposed behind said right angle prism and in the path of said laser light; a second right angle prism disposed behind said focus lens lupe and in the path of said laser light a polarization beam antenna disposed behind said second right angle prism; an operate prism mirror disposed adjacent to said polarization beam antenna; a reflection prism mirror disposed adjacent to and generally in between said polarizing beam antenna and said operate prism mirror; a diaphragm frame disposed adjacent to said operate prism mirror; a focus lens disposed opposite the reflection prism mirror; an objective lens disposed behind said focus lens; a top prism disposed adjacent to said polarization beam antenna; a focus glass comprising a scale, a contact multiplier, and a contact plus disposed adjacent to said top prism; an eyeglass disposed behind said focus glass; and one or more hanger strings connecting the operate prism mirror to said housing.