The range of vision which was seen the eye of the device null observer who decides the range of vision part which was seen

摘要

PURPOSE: To decide the visual filed part viewed by an observer. ;CONSTITUTION: The device for deciding visual field part viewed by eyes of an observer is provided with optical observation devices 2 and 3 which are provided with eyepieces 15 for putting eyes 5 and through which a visual field 6 can be seen by the eyes 5 and a first optical member 22 which is placed on the objective focus side of the eyepieces 15, passes a beam of light 16 passed through the devices 2 and 3 from the visual field 6 for forming at least one reflection, and sends a light beam 24 emitted from a light source 23 to the eyes 5.;COPYRIGHT: (C)1993,JPO