CN100390812C - Test tool for dermatoglyph reader - Google Patents

Abstract

The present invention discloses a testing tool for a skin pattern reader, which includes: a colloid and a fixing fixture. The colloid has a concave-convex surface or a flat surface, and the colloid is made of a material with the same refractive index as human skin. The fixing fixture is used to fix the colloid and drive the colloid so that the concave-convex surface of the colloid is close to the skin pattern reader to perform relevant functional tests of the skin pattern reader. Therefore, by using a colloid with a refractive index similar to that of human skin, not only a standardized test sample can be established, but also the defects of the known use of a flat paper with spaced stripes or the skin pattern of a tester can be compensated.

Description

Test Tool for Texture Readers

technical field

The present invention relates to a test tool used for a skin-print reader, in particular to a test tool for carrying out relevant function tests of the skin-print reader through a colloid having a refractive index similar to that of human skin.

Background technique

Skin lines are the best proof of a person's identity. Everyone's skin lines are different and not easy to change. Therefore, the identity of the user can be confirmed with the help of skin pattern recognition, and such a highly secure identification tool has become a necessary device for personal protection and identity display. It can be predicted that in the future, people will pursue greater convenience and comfort, and skin texture identification will inevitably be widely used to replace or assist commonly used identification methods.

In addition, the optical dermatoglyph identification device converts the unevenness of dermatoglyphs into the intensity of light, and then converts it into corresponding electrical signals by means of photography, and compares the obtained electrical signals with those stored in advance. Compare the personal electrical signal to confirm whether it is the real person.

From the importance of the above-mentioned dermatoglyph identification device, the quality test of the dermatoglyph reader of the dermatoglyph identification device at the time of production is very important, and affects the rights and interests of users to a great extent. Generally speaking, the test methods of known skin texture readers include the following three types:

1. Scattering type

In a copier-like manner, it directly reads the image contrast signal from the peaks and valleys of the striae. Usually, when the extracted fringe signal is strong, it represents the ridge of the striae; when the fringe signal is weak, it represents the valley of the striae.

Two, total reflection type (total internal reflection type)

The refractive index of the air in the dermis valley is 1, the refractive index of the skin epidermis is about 1.4 to 1.55, and the refractive index of the prism is also about 1.5. Put the skin texture on the slope of the prism of the skin texture reader, so that the light beam of the light source hits the skin texture at an incident angle larger than the critical angle (critical angle), because the refractive index of the air and the refraction of the prism There is a large difference in the rate, and the valley of the skin texture will undergo total internal reflection due to being filled with air, and then reach the light sensor through the optical path, so the sensor of the skin texture reader sees brighter; The refractive index of the prism is close to that of the prism, so there is almost no total reflection at the peak of the skin texture and it penetrates into the skin, so there is light loss (loss) for the light sensor, so the sensor of the skin texture reader Seeing is darker. Therefore, with the help of the total reflection of the valley and the peak, the sensor of the skin texture reader can obtain the light and dark stripes, so as to obtain the peak and valley information of the skin texture.

3. Proximity

The refractive index of the air in the skin valley is 1, the refractive index of the skin epidermis is about 1.4 to 1.55, and the refractive index of the transparent cover is about 1.5. Therefore, when the light beam passes through the peak of the striae and the transparent cover from the finger, since the refractive index of the skin at the peak of the striae is relatively close to that of the transparent cover, the The higher the penetration rate, the brighter the sensor of the dermatoglyph reader can see; and when the light beam passes through the dermatoglyph valley and passes through the air, since the refractive index of the skin at the dermatoglyph valley is greatly different from that of the air, As a result, the light transmittance is low. Similarly, when the light beam passes through the transparent cover from the air, the transmittance will be lost again due to the large difference in refractive index on both sides of the interface. Therefore, the sensor of the skin texture reader Seeing is darker. Therefore, with the help of the total reflection of the dermatoglyph valleys and peaks, the sensor of the dermatoglyph reader can obtain the light and dark fringes to obtain the information of the dermatoglyph peaks and valleys.

Furthermore, generally in order to enable the dermatoglyph reader to have a dermatoglyph test standard during testing, a flat paper with stripes arranged at intervals has traditionally been used to imitate the peaks and valleys of the dermatoglyph for Tests for the relevant functions of the skin texture reader. However, the above-mentioned method of using paper to imitate skin texture can only be applied to the scattering type, not to the total reflection type or the proximity type, because it cannot imitate the refractive index of the air part.

However, in order to conduct total reflection or proximity tests, generally only artificial methods can be used to directly use the skin texture of the tester to test related functions. Although the test carried out in this way is the closest to the actual use state, it will consume a lot of manpower and have the disadvantage of low test efficiency because of the manual method. In addition, because the skin texture of each tester is different, it cannot Obtain a standardized test sample (golden sample).

From the above, it can be seen that currently known test tools for skin texture readers (including flat paper with stripes arranged at intervals, or the skin texture of the tester) obviously have defects and are inconvenient, and need to be improved.

Contents of the invention

The object of the present invention is to provide a test tool used in a skin texture reader, which can not only establish a standardized test sample through a colloid with a refractive index similar to human skin, but also solve the problem of using the known method of using stripes with intervals. Defects in flat paper or tester's skin texture. Furthermore, since the present invention can imitate the air part of the real situation, the present invention can be applied to any known test method (such as scattering type, total reflection type or proximity type) of the skin texture reader to carry out the test method of the skin texture reader. related functional tests.

In order to achieve the above object, the present invention provides a test tool used in a skin texture reader, which includes: a colloid and a fixing fixture. Wherein, the colloid has a concave-convex surface, and the colloid is made of a material having the same refractive index as human skin; Texture reader, in order to carry out the relevant function test of this skin pattern reader.

In order to achieve the above object, the present invention provides a test tool used in a skin texture reader, which includes: a colloid and a fixing fixture. Wherein, the colloid has a flat surface, and the colloid is made of a material having the same refractive index as human skin; Texture reader for quality control testing of the Texture reader

The features of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.

Description of drawings

Fig. 1 is the side view of the first embodiment of the test tool used in the skin texture reader according to the present invention;

Fig. 2 is the top view of the first embodiment of the test tool used in the skin texture reader according to the present invention;

Fig. 3 is the top view of the second embodiment of the test tool used in the skin texture reader according to the present invention;

Fig. 4 is the top view of the third embodiment of the test tool used in the skin texture reader according to the present invention; and

Fig. 5 is a side view of the fourth embodiment of the testing tool used in the skin texture reader according to the present invention.

Among them, reference signs:

1 colloid

10 bumpy surface

101 straight stripes

102 diagonal stripes

103 spiral stripes

11 piercing

12 flat surfaces

2 Fixtures

3 Fixing parts

Detailed ways

Please refer to FIG. 1 and FIG. 2 , which are respectively a side view and a top view of a first embodiment of a testing tool used in a skin texture reader according to the present invention. It can be seen from the figure that the present invention provides a test tool for a skin texture reader, which includes: a colloid 1 and a fixing fixture 2 .

The colloid 1 has a concave-convex surface 10, and the colloid 1 can be made of a material having the same refractive index as human skin. Wherein, the refractive index of the human skin can be between 1.4 and 1.6 (the best case is about 1.5), and the concave-convex surface 10 can be periodic or non-periodic stripes. In the first embodiment, the stripes It is a linear stripe 101 .

In addition, please refer to FIG. 3 and FIG. 4 , which are top views of the second embodiment and the third embodiment of the test tool used in the skin texture reader of the present invention, respectively. It can be seen from the figure that the stripes can be oblique stripes 102 (as shown in FIG. 3 ), concentric circles or spiral stripes 103 (as shown in FIG. 4 ), or any type of stripes according to the needs of the tester.

Furthermore, discussing the structure of the concave-convex surface 10 of the colloid 1, the width w between the peaks or valleys of the concave-convex surface 10 is between 0.01-1mm, and the depth d between the peaks and valleys of the concave-convex surface 10 is between Between 0.01-1mm. The limits of the width w and the depth d are not intended to limit the present invention. In addition, the colloid 1 can also be made of a translucent material with the same light transmittance as human skin.

In addition, the fixing fixture 2 can respectively pass through the through holes 11 of the glue 1 to fix the glue 1 on the fixing fixture 2 by means of the fixing pieces 3 . The above method of fixing the colloid 1 to the fixing fixture 2 is not intended to limit the present invention, and any way that the colloid 1 can be fixed or positioned on the fixing fixture 2 is within the protection scope of the present invention. Furthermore, the fixing fixture 2 can also be used to drive the colloid 1 so that the concave-convex surface 10 of the colloid 1 is close to the skin texture reader (not shown in the figure), so as to perform related functional tests of the skin texture reader.

Please refer to FIG. 5 , which is a side view of a fourth embodiment of the test tool used in a skin texture reader according to the present invention. It can be seen from the figure that the biggest difference between the fourth embodiment and other embodiments is that the colloid 1 has a flat surface 12 . Therefore, the fixing fixture 2 can drive the flat surface 12 of the colloid 1 close to the skin texture reader for the quality control test of the skin texture reader. That is, at first, the skin texture reader can utilize a sensor (sensor) to sense the flat surface 12 of the colloid 1, and then after obtaining a completely dark or completely white skin texture information, judge whether the illumination is even or not and Whether there are white spots (defects) in the all-dark dermatoglyphs information, or judge whether there are black spots (defects) in the all-white dermatoglyphs information. With the help of the above tests, it is judged whether the quality of the skin texture reader meets the standards.

In summary, the present invention can not only establish a standardized test sample through a colloid 1 with a refractive index similar to human skin, but also solve the known problem of using flat paper with stripes arranged at intervals or the presence of tester's dermatoglyphs. Defects. Furthermore, since the present invention can imitate the air part of the real situation, the present invention can be applied to any known testing method of the skin texture reader (such as scattering type, total reflection type or proximity type) to read the skin texture Test related functions of the device.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding changes All changes and modifications should belong to the scope of protection of the appended claims of the present invention.

Claims (11)

1. A test tool used for a skin texture reader, characterized in that it comprises: a gel having a concave-convex surface made of a material having the same refractive index as human skin; and A fixing fixture is used to fix the colloid, and drive the colloid, so that the concave-convex surface of the colloid is close to the skin texture reader, so as to carry out related function tests of the skin texture reader. 2 . The testing tool for a skin texture reader according to claim 1 , wherein the refractive index of the human skin is between 1.4 and 1.6. 3. The test tool for a skin texture reader according to claim 1, wherein the colloid is made of a material having the same light scattering properties as human skin. 4 . The test tool for a skin texture reader according to claim 1 , wherein the colloid is made of a material that has the same light attenuation properties as human skin. 5 . The testing tool for a skin texture reader according to claim 1 , wherein the concave-convex surface is periodic or non-periodic stripes. 6 . The testing tool for a skin texture reader according to claim 5 , wherein the stripes are straight, oblique, concentric, or spiral. 7 . 7. The test tool used for a skin texture reader according to claim 1, wherein the width between the peaks or valleys of the concave-convex surface is between 0.01-1mm, and the peak-to-valley gap between the concave-convex surfaces The depth range is between 0.01-1mm. 8. A test tool for a skin texture reader, comprising: a gel having a flat surface made of a material having the same refractive index as human skin; and A fixing fixture is used to fix the colloid, and drive the colloid, so that the flat surface of the colloid is close to the skin texture reader, so as to perform the quality control test of the skin texture reader. 9 . The testing tool for a skin texture reader according to claim 8 , wherein the refractive index of the human skin is between 1.4 and 1.6. 10. The testing tool for a skin texture reader according to claim 8, wherein the colloid is made of a material having the same light-scattering properties as human skin. 11. The testing tool for a skin texture reader according to claim 8, wherein the colloid is made of a material having the same light attenuation properties as human skin.

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