Patent ID: 7699477
Filing Date: 2010-04-20
Classification: G02B

Abstract:
1. An alignment method for a guiding device which is attached to an end of an objective lens in such a manner as to be capable of positional adjustment in an optical axis direction and which is brought into contact with an examination target to make a focal position of the objective lens coincident with an examination site, the alignment method comprising: securing, to an end face of the guiding device, an alignment screen, having a predetermined pattern, at a position which intercepts the optical axis of the objective lens when the guiding device is attached thereto; relatively moving the objective lens and the guiding device, to which the alignment screen is secured, in the optical axis direction; fixing relative positions of the objective lens and the guiding device at a position where an in-focus image of the pattern of the alignment screen is obtained, or at a position further relatively shifted by a predetermined distance from that position; and removing the alignment screen from the guiding device.