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Skin evaluation method and skin evaluation device

Through optical coherence tomography technology, the profile of reflected light inside the skin is used to generate evaluation indicators, which solves the problem of difficulty in evaluating dimness and transparency with existing technology, and achieves high-precision evaluation of skin condition.

Inactive Publication Date: 2015-03-04
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the condition of the skin cannot be accurately grasped only by measurement with a colorimeter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0038] figure 1 The structure of the skin evaluation apparatus which performs the skin evaluation method of Embodiment 1 of this invention is shown. The skin evaluation device uses optical coherence tomography (Optical Coherence Tomography; OCT) to evaluate the state of the skin of the subject, and has an OCT unit 10 that irradiates the skin with measurement light and selectively detects the measurement light sequentially reflected from the inside of the skin. Light caused by light: and the evaluation device main body 11 evaluates the condition of the subject's skin based on the light detected by the OCT unit 10 .

[0039] The OCT unit 10 includes: a light source 1 that emits the outgoing light L0; a detector 2 that irradiates the skin S with the measurement light L1 and receives reflected light L3 generated by reflecting the measurement light L1 in the skin S; an optical path length adjustment unit 3 that Reflecting the reference light L2 to generate the reference light L4; ...

Embodiment approach 2

[0079] In Embodiment 1 described above, the skin condition evaluation module 17 can also calculate the boundary region reflecting the lower layer of the epidermis and the upper layer of the dermis, that is, the region where the change in skin condition is estimated to be large due to age-related dullness and translucency. Other evaluation indicators of the reflectivity of the area. Specifically, the ratio of the contour area S1 on the shallow side to the contour area S2 on the deep side at a specific depth position from the lower layer of the epidermis to the upper layer of the dermis can be calculated and used as an evaluation index.

[0080] For example, in Figure 6 In the shown profile, the depth position D1 representing the minimum point P1 can be calculated, and at this depth position D1, the difference between the profile area S1 on the shallow side and the profile area S2 on the deep side at a predetermined depth, for example, 750 μm, can be calculated. ratio and set...

Embodiment approach 3

[0086] In addition, in general, it is known that the thickness of the epidermis of the skin S decreases as one of the main causes of dullness of the skin S with age, decrease in translucency, and the like. Therefore, the skin state evaluation module 17 can also calculate the thickness of the epidermis from the profile and use it as an evaluation index. For example, the thickness from the surface of the epidermis to the depth position D2 representing the second maximum point P2 can be calculated from the profile and regarded as the thickness of the epidermis, and can be used as an evaluation index. In fact, it can be seen that: compared to image 3 (A) shows the profile C20 in the 20s, at image 3 In the profile C40 in the 40s shown in (C), the depth position D2 representing the second maximum point P2 is located on the shallow side, and the thickness of the epidermis becomes thinner with age.

[0087] Furthermore, it is known that the internal scattering of light in the epid...

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Abstract

A profile is created on the basis of an interference signal obtained by optical coherence tomography, the profile having optical reflectance in relation to depth in a depth range that extends from the epidermis to the dermal upper layer. The difference between a reflectance (R1) at a minimum point (P1) and a reflectance (R2) at a maximum point (P2) is calculated from the created profile to obtain an evaluation index. The state of skin is evaluated on the basis of the evaluation index.

Description

technical field [0001] The present invention relates to a skin evaluation method and a skin evaluation device, and more particularly, to a skin evaluation method and a skin evaluation device for evaluating skin conditions such as dullness and translucency. Background technique [0002] In recent years, with the rise of beauty consciousness, attention has been paid to various skin symptoms such as dullness and translucency. Dullness often occurs on the entire face or around the eyes and mouth. For example, the brightness of the skin is reduced and the skin looks dark, or the rosiness of the skin is reduced and the skin looks yellowish. [0003] As a method of measuring dullness and transparency, there is a method of observing the skin surface using a colorimeter that measures the brightness and hue of the skin. However, the main causes of dullness and loss of translucency are various factors such as age, tanning, and saccharification of collagen in the interior of the skin, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17
CPCG01N21/4795A61B5/0066A61B5/1075A61B5/441A61B5/0075A61B5/0082A61B5/1077A61B5/1079A61B5/742A61B8/0858
Owner FUJIFILM CORP
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