Patent Number: 6,166,802

Title: Beam detector

Abstract: A reference beam detector according to the invention can be used to accurately and efficiently perform a level shifting operation by means of a reference beam and effectively eliminate the use of markers and other devices that are structurally simple but entail cumbersome operations and also the use of a level shifter. The beam detector comprises a detector main body having a beam receiving section for detecting an emitted laser beam, a display section for displaying the position of receiving the emitted beam relative to the reference position of the beam receiving section and a slidable index section having an index for indicating the position relative to the reference position.

Inventors: Kodaira; Jun-ichi (Tokyo, JP), Yamazaki; Takaaki (Tokyo, JP)

Assignee: Kabushiki Kaisha Topcon

International Classification: G01C 15/00 (20060101); G01C 003/08 (); G01C 015/06 (); G01B 011/00 ()

Expiration Date: 12/26/2017