JPH0534641A - Observing device and method - Google Patents

Abstract

PURPOSE:To realize the observing device and the observing method capable of eliminating a mirror face reflection with a simple means. CONSTITUTION:An illuminating light from a fluorescent tube 1 becomes a polarized light by passing through a light source polarizing filter 2, and illuminates an object 4 to be observed. Between a visible position 5 and the object 4 to be observed, an observation polarizing filter 3 is placed, and the object 4 to be observed is observed. By setting the direction of a polarization axis of the observation polarizing filter 3 in an adequate direction, for instance, chinaware, pictures, a table, a floor, an object wrapped with a transparent resin film, etc., can be observed without being influenced by a mirror face reflection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an observing apparatus for illuminating and observing an object to be observed, and an observing method.

[0002]

2. Description of the Related Art When observing an object by illuminating it with a light source or the like, the object to be observed causes specular reflection, for example,
In the case of a pottery, a painting, a table, a floor, an object wrapped with a transparent resin film, etc., not only the specularly reflected portion cannot be observed, but also the reflected light interferes with the observation, making it difficult to observe. In this specification, “observation” is not limited to visual observation, and when an object to be observed is imaged by a camera or when image information is obtained using an image scanning element, It is a term used in a broad sense. Of course, this also includes the case of observing through an optical device such as a microscope.

It is conventionally known to use polarized light for the object to be observed as described above. For example, a method for removing specular reflection is described in "Polarization and its Applications" (First Edition), pages 134 to 135, published by Kyoritsu Shuppan Co., Ltd. and translated by Fukutomi et al. The method is to wear polarized glasses,
Alternatively, a polarizer is attached in front of the camera. This method is a method in which the surroundings of the polarizer are determined so that unnecessary polarized light is blocked and the observation is performed. In this way, by using a polarizer, instead of observing the light that has been specularly reflected and emitted through the polarizer, a polarizer is inserted between the light source and the object to be observed, and specular reflection is performed. It also describes how to remove it.

Such a conventional method attempts to remove specular reflection by observing polarized light in a specific azimuth by interposing a polarizer on the light source side or the observation side. However, according to the experiments, it was not possible to sufficiently remove the specular reflection by using any of the methods. Rather, by using the polarized light, the illumination light or the reflected light is felt to be substantially reduced to about 1/2, and the portion where the specular reflection occurs is sufficiently disturbed by the reflected light. I couldn't observe it. In particular, it is impossible to identify characters or symbols on an object whose surface has various angles, for example, an object wrapped with a transparent resin film.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide an observation apparatus and an observation method capable of removing specular reflection by a simple means. To do.

[0006]

The present invention is characterized in that, in the invention of claim 1, the observation device comprises a light source means having a polarizer and an observation means using the polarizer. According to the invention of claim 2, the observation method is characterized in that the object to be observed is irradiated with polarized light and the object to be observed is observed through a polarizer.

[0007]

According to the present invention, although the optical reason cannot always be confirmed, when the object to be observed is illuminated with polarized light and observed, the orientation of the polarizer is observed as an appropriate orientation. By doing so, it is considered that the disturbing specular reflection component can be removed. According to the experiment, when observed by illuminating with a polarized light source, or when observing through a polarizer under normal illumination, the characters on the surface of the object wrapped with cellophane or the spherical surface, for example, the surface of a pachinko ball, According to the present invention, these characters were sufficiently visible while the characters could not be recognized.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic configuration diagram for explaining one embodiment of the present invention. In the figure, 1 is a direct current lighting fluorescent tube, 2 is a light source polarization filter, 3 is an observation polarization filter, 4 is an object to be observed, and 5 is a visual recognition position. DC-lit fluorescent tube 1
Is used as a light source capable of preventing flickering during observation. Of course, an AC-lit fluorescent tube or an incandescent lamp may be used. The azimuth of the polarization axis of the light source polarization filter 2 is the direction of the tube axis of the fluorescent tube 1. The azimuth of the polarization axis may be another azimuth, but it is considered that the azimuth of this embodiment has a large amount of light when a fluorescent tube is used. The observed object 4 illuminated through the light source polarization filter 2 is observed at the visual recognition position 5 through the observation polarization filter 3. The azimuth of the polarization axis of the observation polarization filter 3 is different from the azimuth of the light source polarization filter 2, but an appropriate azimuth for removing specular reflection may be set while observing.

When an observation experiment was actually conducted using this method, the characters on the surface of the product wrapped in the wrap shown in FIG. 2 could be easily confirmed. Also, the markings on the surface of the pachinko ball could be easily read.

[0010]

As is apparent from the above description, according to the present invention, it is possible to easily recognize an object to be observed which causes specular reflection, which has been difficult to recognize in the past.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram for explaining an embodiment of the present invention.

FIG. 2 is a perspective view of an example of an observed object.

[Explanation of symbols]

1 fluorescent tube 2 Light source polarization filter 3 Observation polarization filter 4 Object to be observed 5 Viewing position

Claims (2)

[Claims] 1. An observing apparatus comprising a light source means having a polarizer and an observing means using the polarizer. 2. An observation method comprising irradiating an object to be observed with polarized light and observing the object to be observed through a polarizer.