JPS5951018B2 - light pen guide - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a light pen guide, and in particular:
This invention relates to a light pen guide used when pointing an image on a CRT (cathode ray tube) screen with a light pen.

Conventionally, when specifying an image on a CRT screen, reading was performed by touching the tip of a light pen to the coordinate position to be specified.

However, since the tip of a light pen generally has a small area, it is difficult to bring the light pen into contact with the CRT surface at right angles for the following reasons, which results in errors in reading coordinates. It had the disadvantage of being easy to use.

1. The glass interposed between the CRT fluorescent surface and the CRT surface is thick.

2CRT surface is curved.

θ3 Operator's <se.

SUMMARY OF THE INVENTION An object of the present invention is to provide a light pen guide that eliminates the above-mentioned drawbacks and reduces errors in reading indicated coordinates.

In order to achieve the above object, the present invention provides a guide hole having the same shape on one side of the light pen guide for inserting the tip of the light pen, and the other side has a guide hole formed on the convex surface of the CRT. It is characterized in that it is constructed to suit various conditions, and that a cross-shaped center gauge is provided at or near the point of contact between the guide hole and the other surface.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a sectional view showing the state of use of the present invention. In these figures, 1 is a light pen, 2 has a guide hole 21 of the same shape on one surface into which the tip of the light pen 1 is inserted, and the other surface has a C (not shown).
The light pen card 3 is formed in a concave shape to match the convex state of the RT surface, and numeral 3 is a cross-shaped center gauge provided on the light pen guide 2.

The light pen guide 2 is made of transparent acrylic resin or the like. Furthermore, as will be described later, when the tip of the light pen 1 is inserted into the guide hole 21, the guide hole 21 is formed so that the light pen 1 has a convex surface (i.e.,
It must be oriented perpendicular to the surface of the CRT.

In FIG. 3, 4 is an optical fiber tube provided at the tip of the light pen 1, 5 is a light receiving element having a light receiving surface 51, and the optical fiber tube 4 is connected to the light receiving surface 51; is the CRT surface, 7 is the front glass of the CRT, and 8 is the fluorescent surface of the CRT.

Using the light pen guide configured as described above,
When reading an image, it is performed as follows.

First, the light pen guide 2 is brought into contact with the CRT surface, and then the center point of the center gauge 3 provided on the light pen guide 2 is aligned with the coordinate point to be indicated on the CRT image.

Furthermore, the light pen 1 is inserted and fitted into the guide hole 21 of the light pen guide 2.

As a result, the tip of the light pen 1 is correctly aligned with the coordinate point to be indicated and brought into contact with the CRT surface 6 at right angles. Thereafter, the information is read and instructions are given using a known image reading method.

Alternatively, the light pen guide 2 may be fixed to the tip of the light pen 1 to use it as a light pen with a guide.

In this case, it is better to write the center gauge 3 over a wide area on the concave surface of the light pen 2 (the surface that contacts the CRT surface 6) in order to make it easier to see from the outside.

According to the present invention, since the light pen can always be brought into contact with the CRT surface at right angles, there is an advantage that errors in pointing coordinate points are reduced.

Furthermore, by providing a cross-shaped center gauge on the light pen guide, coordinate points can be specified more accurately.

Note that the cross-shaped center gauge may be provided on the inner inclined surface of the guide hole in addition to the position shown in the figure.

Also, the guide hole may or may not penetrate the light pen guide.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a sectional view showing the state of use of the present invention. 1...Light pen, 2...Light pen guide, 3...Cross-shaped center gauge, 21...
...Guide hole.

Claims (1)

[Claims] 1. A guide hole that reaches from one surface to the vicinity of the other surface, or penetrates the other surface, and is approximately perpendicular to the other surface, into which the tip of the light pen is inserted, and a convex shape on the CRT surface. the other surface formed into a concave surface that fits the surface;
A light pen guide comprising a cross-shaped center gauge provided at or near a contact point between the other surface and the guide hole, and at least the vicinity of the guide hole is transparent.