| 摘要 |
PURPOSE:To detect assuredly the light of the pictures on a screen even though a light pen is pressed to the screen with an inclination, by using a member which is deformed or moved back with the pressure to the tip part of the light pen and then providing a reflector, etc. at the inside of said member. CONSTITUTION:A bellows-shaped mobile part 22 which is deformed with the pressure is attached at the tip of a light pen, and a concave mirror 23 is set inside the part 22. When the light pen is pressed to a screen 33 of a display with an inclination given to the tip part of the pen, the lower part 22a of the part 22 is compressed. Thus the mirror 23 touch close the screen 33. Therefore the optical axis of the mirror 23 is set rectangular to the screen 33, and the light coming out of a screen 31 passes through an optical path 32 and is reflected by the mirror 23 to be made incident to a photoelectric transducer 21. The electric signal converted by the transducer 21 is supplied to an amplifying circuit 25 through an electric signal path 24 to be amplified and then delivered to a detecting signal path 26. |
