JPH08145635A - Measuring method for shaving depth and depth of wrinkles - Google Patents

Abstract

PURPOSE: To measure the shaving depth and the depth of winkles accurately in a short time. CONSTITUTION: The shape on the surface of skin is transferred to a replica 1 and the surface of the replica is set on an object of a means 2 for measuring the distance to object using electromagnetic wave for obtaining a data representative of the irregularities on the surface of the replica 1. Irregular shape on the surface of skin can be obtained in the form of a distributed height data and the shaving depth and the depth of wrinkles can be measured accurately.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring method for measuring the shaving depth and wrinkle depth after shaving.

[0002]

2. Description of the Related Art To evaluate shaving means such as an electric razor,
With this shaving means, the depth of a shaving trace when shaving body hair such as beard or axilla is measured. Further, when evaluating a beauty tool, the depth of wrinkles on the face before and after use is measured.

When measuring such a shaving depth or wrinkle depth, usually, a replica in which the unevenness of the skin surface is transferred by using a silicon resin or the like is used, and conventionally, the unevenness of the replica and the replica is transferred again. By observing the secondary replica, whose unevenness is the same as that of the skin, at different angles with a scanning electron microscope or stereomicroscope with a high depth of focus, it is possible to compare the obtained image with a standard scale prepared in advance. Was measuring the depth (depth).

[0004]

In this case, since the skin surface is not a flat surface but a curved surface, it is necessary to accurately determine how to form a reference surface for taking the absolute value of depth. The problem is that it cannot be judged. Also, the skin condition varies greatly from person to person, and even when measuring the shaving depth, it is difficult to show the shaving depth as an absolute value simply by looking at the beard portion, and a large amount of data was collected. Even in the case of statistical processing, it is necessary to clarify which surface is the reference surface. And in order to obtain one shaving depth data, since the pores are inclined holes, it is necessary to obtain height (depth) data while observing from many angles and recognizing the shape. Of course, this requires a lot of time.

Moreover, when collecting a replica of the skin surface,
Occasionally, the shape of the skin cannot be transferred accurately. For example, air bubbles may enter between the skin and the resin, or sweat on the skin may cause irregularities on the replica. Therefore, identify which of the numerous irregularities on the replica surface should be measured. You have to do it. However, when observing with a scanning electron microscope or a stereoscopic microscope to measure the depth of a recessed portion on the skin surface, there are many cases where the above identification is difficult.

On the other hand, when measuring the depth of wrinkles such as the outer corners of the eyes, it is possible to take a replica of this portion and project slit light on it to produce a shadow and measure the depth from the shadow at this time. However, it is difficult to measure absolute values and it takes a long time to measure. In the case of shaving depth, it is also possible to estimate the shaving depth by calculating the speed at which the beard grows after taking different photographs of how much the beard grows after shaving, and then calculating backwards to estimate the shaving depth. Since it is dimensional information, it is not possible to calculate an accurate speed depending on the direction and direction of the beard growth, and there is the problem of whether or not the growth speed is constant.

The present invention has been made in view of the above points, and an object thereof is to measure the shaving depth and wrinkle depth with which the shaving depth and wrinkle depth can be accurately measured in a short time. There is a way to provide.

[0008]

SUMMARY OF THE INVENTION In the present invention, however, the replica surface is set on the object of the length-measuring means for making a replica in which the shape of the skin surface is transferred and measuring the distance to the object using electromagnetic waves. Then, the height data of the unevenness of the replica surface is obtained by the length measuring means.

[0009]

According to the present invention, since the uneven shape of the skin surface can be obtained as the distribution of height data, the shaving depth and the wrinkle depth can be accurately examined. As the length measuring means used here, those commercially available as laser microscopes can be preferably used, but among them, when the light projecting axis and the light receiving axis are the same, the measurement is performed in the shadow. More preferable results can be obtained because the number of unworkable parts is reduced.

Further, the height data obtained by the length measuring means can be output as a three-dimensional shape. At this time,
If the one that can output the three-dimensional shape by inversion is used, it becomes easy to recognize the condition of the unevenness of the skin. If noise removal and shape identification are performed by image processing of height data obtained by the length measuring means, more accurate measurement can be easily performed.

[0011]

EXAMPLES The present invention will be described in detail below with reference to examples.
In the present invention, first, the replica 1 of the portion to be measured is created. That is, in the case of measuring the shaving depth of a beard, a replica 1 of the beard's lower nose, chin, submaxillary area, and cheek is created, and the shaving depth when shaving the armpits, legs, hands, etc. Regarding this, replica 1 of these parts is created. When it is desired to measure the depth of wrinkles on the face such as the corners of the eyes and the forehead, or other parts, a replica 1 of the part is created.

Silicon resin is usually used to make the replica 1, but a resin that can accurately transfer the shape of the skin surface,
For example, it is not particularly limited as long as it is a resin that has fluidity before curing, sufficiently penetrates into the pores of the hair root, does not fall off after curing, and has no large shrinkage. The area to be measured is determined by the size of the resin that transfers the shape accurately. The height is measured efficiently, and the size of the beard, body hair, roots, and wrinkles of the desired shaving depth is included. Specifically, one side is about 5 mm to 100 mm, and the shape such as a square, a rectangle, and a circle is not particularly limited. In addition, it is possible to measure a wider range by continuously transferring the measurement place with some resins.

FIG. 2 shows the procedure for making the replica 1 of the shaving trace. In the figure, 11 is the epidermis of the skin, 12 is the dermis,
Reference numeral 13 is cut hair (beard). As shown in FIG. 4A, after shaving, the resin 10 in a fluid state is applied to the skin surface. At this time, the resin gets into the pores of the shave. Once the resin 10 has hardened, peel it off your skin
It is possible to obtain the replica 1 in which the portion that has entered the pores is the convex portion 15.

In the present invention, the measurement is performed using the replica 1 in this state, that is, the replica 1 in which the irregularities of the skin are reversed is present on the surface. It is possible to obtain a secondary replica that conforms to the unevenness of the skin by transferring again using this replica 1, but when such transfer is repeated, bubbles may enter between the resin and other shape accuracy. The primary replica 1
Shall be used. If you used primary replica 1,
Since the pores of the skin are the convex portions 15, they are suitable for measurement by the length measuring means 2.

The uneven shape of the surface of the replica 1 is obtained as a distribution of uneven height data by the length measuring means 2 for measuring the distance to the object using electromagnetic waves (including light). As the length measuring means 2 in this case, in order to enable measurement of a fine region, it is preferable to use a laser beam as a light source, narrow the beam diameter to the order of micrometer, and be easy to handle. Further, it is preferable to use one that can process the obtained height data and measurement point data and output the uneven state of the surface of the replica 1 as a three-dimensional shape. In this output,
It is more preferable to use a material that can output the three-dimensional shape by reversing it, because the uneven relationship matches the uneven relationship on the skin. The height information at the time of outputting as a three-dimensional shape may be indicated by shading, for example, but what can be output in a bird's-eye view is easy for a measurer to grasp. In any case, it is assumed that noise is removed by a method of image processing of three-dimensional information from measured data (for example, moving average method). Data of the shaving depth is obtained by recognizing the part to be measured and the skin crevices or cuticles from the output of the three-dimensional shape obtained in this way and determining the surface to be the reference surface of the shaving depth. Can be easily obtained. Since the reference plane can be set automatically in image processing, the shaving depth data can be obtained more easily at this time.

FIG. 1 shows an example of the length measuring means 2. In the figure, 20 is a laser light source, 21 is a half mirror, 22 is an objective lens, 23 is a detector, 24 is a data processor,
Reference numeral 25 is a computer, and 26 is a CRT. Since the length measuring unit 2 of such a system is commercially available as a laser microscope, this system can be used. Also, in this type of length measuring means 2,
As in the illustrated example, it is preferable to use a type in which the light projecting axis and the light receiving axis coincide with each other. Since the pores and the like are not formed at right angles to the skin surface, the convex portion 15 of the obtained replica 1 corresponding to the pore is obliquely projected as shown in FIG. If at least one of the light-projecting axis and the light-receiving axis is slanted, there will be many portions that cannot be measured due to shadows.

By the way, for the lower nose, the jaw and the lower jaw after shaving with an electric razor and a safety razor, a 20 mm square replica was made using silicon resin (Siliflo manufactured by Amic Group), respectively. It was possible to easily measure the shaving depth by measuring with a laser microscope and identifying the beard portion and the reference surface of the skin. Also, by replicating the shape after a lapse of time after shaving and creating a replica and specifying the beard portion and the reference surface of the skin, the length of the extended beard can be easily measured. As a result, I was able to obtain data on the growth speed of the beard.

Similarly, the shaving depth of the axillary region could be measured by making a 30 mm square replica after shaving and measuring with a laser microscope as in the above case. Furthermore, the wrinkle depth could be measured accurately and simply by making a 20 mm × 10 mm square replica and measuring it with a laser microscope also for wrinkles on the outer corners of the eyes.

[0019]

As described above, in the present invention, a replica in which the shape of the skin surface is transferred is created, and the replica surface is set on the object of the length measuring means for measuring the distance to the object using electromagnetic waves. Since the height data of the unevenness of the replica surface is obtained by the length measuring means, the uneven shape of the skin surface can be obtained as the distribution of the height data.For this reason, the shaving depth and wrinkle depth can be accurately determined. It can be easily and easily investigated.

As the length measuring means used here, those commercially available as a laser microscope can be preferably used, but among them, it is preferable that the light projecting axis and the light receiving axis are the same. In this case, more accurate measurement can be performed because there are less shaded portions that cannot be measured. If the height data obtained by the length measuring means can be output as a three-dimensional shape, or if the height data can be inverted and output at this time, the situation of unevenness of the skin Since it becomes easier for the measurer to recognize, it becomes easier to specify the part to be measured and set the reference plane. If noise removal and shape identification are performed by image processing of height data obtained by the length measuring means, accurate measurement can be performed more easily.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a length measuring unit used in the present invention.

2A to 2C show a procedure for making a replica, where (a) is a cross-sectional view of the skin after shaving, (b) is a cross-sectional view of the skin during transfer, and (c) is a cross-sectional view of the obtained replica. is there.

[Explanation of symbols]

 1 Replica 2 Measuring method

Claims (5)

[Claims] 1. A height data of unevenness of a replica surface by setting the replica surface as an object of a length measuring means for making a replica in which the shape of the skin surface is transferred and measuring the distance to the object using electromagnetic waves. A method for measuring shaving depth and wrinkle depth, characterized in that 2. The shaving depth and wrinkle depth measuring method according to claim 1, wherein the length measuring means having the same light emitting axis and light receiving axis is used. 3. The shaving depth and wrinkle depth measuring method according to claim 1, wherein a three-dimensional shape is output from the height data obtained by the length measuring means. 4. The shaving depth and wrinkle depth measuring method according to claim 3, wherein the three-dimensional shape is inverted and output. 5. The shaving depth and wrinkle depth measuring method according to claim 1, wherein noise removal and shape identification are performed by image processing of height data obtained by the length measuring means.