JPS58150927A - Observing device for visible surface of article with directivity of visibility - Google Patents

Abstract

PURPOSE:To observe the visible surface of an article as a still picture without any restriction of a moving speed by allowing a swing mirror arranged facing the visible surface of the article to rotate following up the movement of the article. CONSTITUTION:In the indication observing device of a clinical thermometer, the clinical thermometer 1 is conveyed at equal intervals in a specific direction and the swing mirror 5 is arranged facing its indication surface 4 and rotated following up the movement of the thermometer 1 to project a reflected image on the TV camera, etc., of the observing device 6. When the angle at which the thermometer 1 moved from a point A to a point B is theta, the mirror 5 rotates at theta/2. Therefore, the indication surface 4 is projected invariably on the video surface of the observing device 6 between the points A and B to observe its indication easily in the form of a still picture without any restriction of the moving speed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for observing the visible surface of an article having visible directionality using a swinging mirror.

Regarding the observation of the visible surface of an article having visible directionality, for example, there is a case where the reading of the mercury column is observed using a scale plate of a glass mercury thermometer (hereinafter referred to as a thermometer). To explain this using the example of the thermometer in Figure 1, the thermometer (1
) The center line X of the cross section of the glass outer tube (2) and the visible direction E of the mercury column at the axis (3) form an angle θF. (2)
The reading of the thermometer is read by rotating the thermometer to find the position where the reflected light from the mercury column is best visible.

In the manufacturing process of a thermometer, when detecting the reading of the thermometer, the above-mentioned operation must be performed mechanically in order to read the reading automatically without relying on the human eye. If the thermometer is being transported intermittently, the thermometer should be kept stationary in a position facing an observation device such as an ITV camera, and the readings should be observed by rotating the thermometer by a certain angle with the axis of the thermometer as the rotation axis. The intermittent conveyance mechanism and the rotation mechanism of the chuck portion of the thermometer are complicated, and the conveyance speed cannot be increased.

In addition, a cylindrical lens is installed between the continuously transported thermometer and the observation device, so that the mercury column can be detected at any position between the time the moving thermometer enters the field of view of the observation device and the time it leaves the observation device. There is a method to observe the reading. This takes advantage of the fact that a cylindrical lens does not refract light rays parallel to the axis, but refracts light rays perpendicular to the axis, and the mercury column reading is determined at the optimal relative position to the thermometer. Although it is observed, the viewing angle is limited by the curvature and arrangement of the cylindrical lens, the moving speed of the image on the observation device's imaging plane varies considerably depending on the position where the mercury column is captured, and the disadvantage is that the image flows because it is not a static image.

The present invention has been made to improve the above-mentioned drawbacks.
The object of the present invention is to provide a device that uses a swinging mirror to observe the visible surface of an article that has visible directionality, such as a thermometer.

The present invention provides a swing mirror disposed facing the visible surface of an article having visible directionality that moves the visible surface in a certain direction, and a swing mirror that rotates to follow the movement of the article described in 011. This is a visible surface observation device of an article having visible directionality, which includes a device for observing a visible surface image reflected by a swing mirror, and a device for observing a visible surface image reflected by a swing mirror.

A thermometer reading observation device will be described as an embodiment of the present invention. In Figure 2, the thermometer (1) is shown! degree (4
) are continuously conveyed in a certain direction at equal intervals, and a swinging mirror (
5) is provided. The swing mirror (5) is moved from point A to point B by a synchronous drive device (not shown) connected thereto.
It rotates to follow the thermometer (1) that moves to the point, and the thermometer (
The reflected image of the reading surface (4) of 1) is projected onto the center of the image surface of an observation device (5) such as an ITV camera. If the visible angle of the reading surface (4) of the thermometer (1), that is, the angle formed by points A and B and the rotation center of the swinging mirror (5), is θ, then the swinging mirror (5) is θ/2.
The angle is set to rotate. Since the thermometer (1) is being conveyed continuously, the swing mirror (5) is
The follow-up movement, that is, the reciprocating rotation, from point to point B is repeated.

In the thermometer reading observation device configured in this way,
When the continuously conveyed thermometer (1) reaches point A, the reading surface (4) of the thermometer (1) is moved through the swing mirror (5).
) is projected onto the image plane of the observation device (6). As the thermometer (1) moves from point A to point B, the swing mirror (5) rotates following the thermometer (11), so the image plane of the observation device (6) always shows the thermometer (1). The reading surface (4) is projected. When the thermometer (1) reaches point B, the swing mirror (5) rotates by an angle of θ/2 to the position of the swing mirror (6a) shown by the broken line. The reading of the thermometer (1) can be easily observed because it is projected onto the image plane of the thermometer (6) which rotates in synchronization with the movement of the thermometer (1).

In the observation device of the present invention, a rotating mirror can be used instead of the swinging mirror, but in this case, the reflected image on the visible surface becomes an image that moves slightly on the image plane.

As described above, the observation device of the present invention is capable of observing the reflected image of a continuously moving object as a still image in the center of the image plane when observing the visible surface of an object having visible directionality such as a thermometer. This method has excellent effects such as not being restricted by the moving speed of the article, and since the swing mirror can be synchronously adjusted for each article, cumulative errors do not occur.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing how the readings of a conventional thermometer appear, and FIG. 2 is an explanatory view showing an embodiment of the present invention. ) is a thermometer, (5) is a swinging mirror, and (6) is an observation device. Patent applicant: Toshiba Glass Corporation Figure X1. 3 Figure 2 Procedural Amendment (Spontaneous) February 7th, 1988 Mr. Commissioner of the Patent Office η°□ I. Indication of the case ゛...ZZShowa 5. 2. Title of the invention: Articles with visible directionality Visible surface observation device 3, person making the amendment Specification 5, contents of the amendment 1-indication fj-m 1 on page 5, line 8 of the specification of the present application
4) Correct J to "reading image". Above 1

Claims (1)

[Claims] a swing mirror disposed opposite to the visible surface of an article having visible directionality that moves the visible surface in a certain direction;
A device for observing a visible surface of an article having visible directionality, comprising a device for rotating the swing mirror to follow the movement of the article, and a device for observing a visible surface image reflected by the swing mirror.