| 摘要 |
PURPOSE:To ensure an accurate inspection for the landing state, by setting a rotary permanent magnet coaxially to a microscope for magnification of fluorescent screen. CONSTITUTION:A rotary support member 7 is set coaxially and rotatably to a conical transparent support leg 5 and at the lower part of the lens barrel of a microscope 4 containing a lens barrel 4. The permanent magnets 8 having opposite polarities to each other are buried at the axially symmetrical positions of the member 7. The member 7 is fitted to a lens barrel 6' for objective lens 9, and at the same time the lower edge of the member 7 is supported rotatably via the flange part of the support frame of the lens 9. An inspecting device of such constitution is set to touch the front glass 2 of a color picture tube 1 and coaxially with the center of either one of the fluorescent matters. The beam spot landing to the fluorescent matter is shifted aside by the permanent magnet. This shift is measured at the position of 180 deg.. In such way, the landing state can be inspected. |
