| 摘要 |
<P>PROBLEM TO BE SOLVED: To demonstrate functions of two or more kinds of light pens by a single light pen. <P>SOLUTION: An LED 4 for emitting white light from a light emitting window formed on one end face 2 of a light pen body 1 and a dry cell 5 are arranged inside the light pen body. A rotary plate 10 is attached so as to be rotated around a spindle 9 on one end face. The rotary plate has a dimension and a shape to cover the light emitting window and is provided with a first hole 11 formed at a position matched with the light emitting window and a second hole formed at the position matched with the light emitting window at a second position rotated by a prescribed angle from a first position at which the first hole is overlapped with the light emitting window. A blue filter is attached to one of the first and second holes. Positioning mechanisms 16-19 for selectively positioning the rotary plate at the first position or the second position are provided on at least one of the light pen body and the rotary plate. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
