| 摘要 |
PURPOSE:To enable several persons to make a check of a drawing in the same area, by irradiating a part where a check of a drawing is required with light from ligthing devices symmetric on an optical axis, and by projecting on the screen of a monitor television an image, taken by a telecamera through an enlarging lens, through a signal processor. CONSTITUTION:Lighting devices 5 and 5' lighting uniformly a part 4 to be checked in an enlarged drawing 3 for a check in, for example, two directions symmetric on an optical axis 2 are fitted to brackets 6 of a telecamera 1. The irradiation angle theta of the lighting devices 5 and 5' to the optical axis 2 is selected freely. Between the telecamera 1 and the drawing check area 4, an enlarging lens system 7 having proper magnifications is provided, and the telecamera 1, lighting devices 5 and 5', and enlarging lens system 7 are movable vertically and horizontally by means of a stage provided for moving purpose. A received signal is inputted to a monitor television 9 through a signal processor 8. |
