CN107837070A - Portable skin detector with big shooting area - Google Patents
Portable skin detector with big shooting area Download PDFInfo
- Publication number
- CN107837070A CN107837070A CN201710923923.8A CN201710923923A CN107837070A CN 107837070 A CN107837070 A CN 107837070A CN 201710923923 A CN201710923923 A CN 201710923923A CN 107837070 A CN107837070 A CN 107837070A
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- light
- lens
- skin
- portable skin
- test instrument
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- 238000012360 testing method Methods 0.000 claims description 11
- 238000009792 diffusion process Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000002834 transmittance Methods 0.000 claims description 3
- 230000003760 hair shine Effects 0.000 claims description 2
- 206010000496 acne Diseases 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 6
- 208000002874 Acne Vulgaris Diseases 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 206010040954 Skin wrinkling Diseases 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000007850 fluorescent dye Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0077—Devices for viewing the surface of the body, e.g. camera, magnifying lens
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/44—Detecting, measuring or recording for evaluating the integumentary system, e.g. skin, hair or nails
- A61B5/441—Skin evaluation, e.g. for skin disorder diagnosis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B13/00—Measuring arrangements characterised by the use of fluids
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- General Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dermatology (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
The invention discloses a kind of Portable skin detector with big shooting area.The Portable skin detector includes camera lens module, light module and the lens barrel with skin contact, and wherein camera lens module includes camera lens, and the shooting area of camera lens is in 15*15 square millimeters between 25*25 square millimeters；Light module is arranged on around camera lens module, and is provided with diffuser plate so that uniform light be irradiated on skin.Portable skin detector provided by the present invention can realize big shooting area and picture quality is undistorted, cost is low, small volume.
Description
Technical Field
The invention relates to a portable skin detector with a large shooting area, and belongs to the technical field of skin measuring instruments.
Background
The skin detectors on the market are divided into a computer type and a portable type. The computer type skin detector is provided with an operation table, the functions and the size of a display screen and a host of the computer type skin detector are equivalent to those of a normal personal computer, such as a American VIS IA skin detector and the like, and the computer type skin detector is mainly used in beauty parlors or professional medical institutions and can detect the skin of a whole face at one time. However, the skin detector is expensive and large in size, and cannot be popularized to common consumers for use anytime and anywhere.
The portable skin detector is only palm size usually, and is convenient to carry, but it can only detect local area, does not possess the function of disposable detection whole face skin. The portable skin detector is usually combined with a mobile phone APP for use, so that the skin detection of ordinary consumers can be conveniently carried out at any time and any place.
However, compared with a computer type skin detector, the portable skin detector has smaller volume and relatively lower computing capability. Limited by volume and computing power, the area detected each time is only a partial area of the face, and the area shot is mostly in the order of square millimeters, such as: 5 mm by 5 mm, etc. The lens shooting magnification of the existing portable skin detector can reach 60: 1, but this approach can cause image distortion.
In addition, the small shooting area can cause the obtained skin data to be incomplete and skin characteristics to be omitted, so that the error correction capability of the skin detector is poor, and the analyzable data are less. For example: the crow's feet are usually over 10 mm, and a shooting area of 5 mm is obviously not capable of shooting a complete image of the crow's feet. Many skin features, such as one acne (commonly called pox) shot, are missed in a 5 mm square shot, while other skin secretions or stains are nearby. Or, since the user of the portable skin detector is a common consumer, the operation experience is not rich, and the problem skin area can only be observed through the mirror surface when the user operates the portable skin detector on the face, the position of the skin detector is placed incorrectly, so that the information of the problem skin is difficult to be completely acquired within the shooting range of 5 square millimeters, and the skin characteristics in the skin image shot by the skin detector are omitted.
Therefore, there is a need for a portable skin inspection instrument that can achieve a large imaging area, and has an undistorted image and low cost.
Disclosure of Invention
In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a portable skin detector with a large shooting area.
In order to achieve the purpose, the invention adopts the following technical scheme:
a portable skin detector with a large shooting area comprises a lens module, a light module and a lens cone contacted with the skin; wherein,
the lens module comprises a lens, and the shooting area of the lens is between 15 × 15 square millimeters and 25 × 25 square millimeters;
the light module is installed around the camera lens module to be provided with the diffuser plate, so that light shines on skin evenly.
Preferably, the field angle of the lens is 35-50 degrees.
Preferably, the plurality of light emitting devices are uniformly arranged in the fixing plate at equal intervals; the diffusion plate covers the light emitting device and has a light transmittance of 80% or more.
Wherein preferably, a fluorescent mixture is coated on the lower surface of the fixing plate at a position exposed except the light emitting device.
Preferably, the fluorescent mixture is a yellow fluorescent mixture, so that light emitted by the light-emitting device becomes white light under the optical action of the fluorescent mixture.
Preferably, the inner surface of the lens barrel is frosted to perform diffuse reflection.
Preferably, the color temperature of the light emitted by the light-emitting device is 5500K to 6500K.
Preferably, the color temperature of the light emitted by the light emitting device is 6000K.
Preferably, the object distance of the lens is 30 mm.
Preferably, the lens module further includes a CMOS sensor device, and the effective photosensitive matrix area of the CMOS sensor device is 2592(W) × 1944 (H).
The portable skin detector with the large shooting area can shoot high-definition and distortion-free skin images with a large area on the premise of meeting the requirements of small and exquisite portability. Therefore, even if the common consumers use the portable skin detector, the complete, comprehensive and accurate skin characteristics can be captured.
Drawings
FIG. 1 is a cross-sectional view of the overall structure of the present invention;
FIGS. 2A to 2C are schematic views of the lens module and the light module according to the present invention;
FIG. 3 is a cross-sectional view of a lens module and a light module according to the present invention;
FIG. 4 is a schematic view of the field of view of the lens of the present invention;
FIGS. 5A and 5B are schematic views of the photographing area of the lens according to the present invention;
FIG. 6 is a schematic view of a diffuser plate according to the present invention;
fig. 7 is a partial schematic view of a light module according to the present invention.
Detailed Description
The technical contents of the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The portable skin detector with the large shooting area provided by the invention can realize the largest shooting area on the premise of ensuring that the whole device is small and portable and the shot image can be clearly distinguished on a screen of a mobile phone or a tablet personal computer and the like, thereby acquiring the characteristic information of a plurality of positions on the skin with a larger area. In contrast to the present invention, it is common practice in other existing products to photograph a smaller area of skin, and obtain finer feature information on the smaller area of skin through a larger magnification (e.g. 15 times) of a magnifying glass or a lens.
In order to obtain more skin characteristic information and obtain a correct skin analysis conclusion, the skin shooting area needs to be enlarged to cover the typical characteristic area of all problem skins as much as possible. In view of the above requirements, and in order to satisfy the technical requirements of being small and portable, having low cost, and clearly photographing all skin features, the portable skin detector provided by the invention has a photographing area within a range of 15 × 15 square millimeters to 25 × 25 square millimeters.
The selection of the above-described imaging area is carefully considered by the inventors. In one aspect, based on prior skin statistics, typical characteristic areas of skin are typically within 20 × 20 square millimeters, for example: acne, blackheads, color spots, pores, and the like. Some skin features are too long, such as the french marks, and may exceed the shooting range of 20 × 20 square millimeters, but the main features (i.e., the parts with the largest texture depth) are still distributed in the shooting range of 20 × 20 square millimeters, so that relatively complete information can be obtained by performing repair compensation on the data information which is not completely shot through the skin information in the range of 20 × 20 square millimeters. On the other hand, more adjacent characteristic symptoms can be acquired in a range of 20 × 20 square millimeters at one time, such as: acne is beside the color spot, and blackheads are around the acne.
In order to realize such a large shooting area, the portable skin detector adjusts the configuration of the lens, and simultaneously, the light is redesigned in consideration of the imaging effect so as to ensure that the irradiation is uniform within the range of the large shooting area and the emission color temperature and the emission intensity accord with the imaging standard. The concrete description is as follows:
as shown in FIG. 1, the portable skin test instrument provided by the present invention comprises a testing portion 100 and a handheld portion 200. The detection part 100 is used to be close to the skin, and the appearance is shown in fig. 2A to 2C; the hand-held portion 200 is used for the user to hold and control for skin detection.
Referring to fig. 1 to 3, the detecting unit 100 includes a lens module and a light module. The following description is made in order from bottom to top in fig. 3.
The lowest part is a lens barrel 2, the lower surface 1 of the lens barrel is used for being attached to the skin of a human face, and light penetrates through the lower surface 1 of the lens barrel and is emitted to the skin to carry out skin detection. Above the lens barrel 2 is a light diffuser plate 3, which is annular and has a gap for lens shooting. Above the light diffuser plate 3 is a light diffuser plate holder 4 for mounting the light diffuser plate 3 on the light wing plate 5, and the light diffuser plate 3 is mounted on the PCB board 10 through a light module holder 6.
A camera lens 8 is arranged right above the light diffusion plate 3. The camera lens 8 is fixed on the PCB board 10 through the camera bracket 7. A CMOS device 9 is arranged right above the camera lens 8 and used for light sensing and converting optical signals into electronic signals.
As shown in fig. 4, in one embodiment of the present invention, the lens field angle of the camera lens 8 is 46.2 °, and the distance from the focal point of the lens to the lower surface 1 of the lens barrel (i.e., the surface of the body of the skin detector contacting the skin edge) is 30 mm, i.e., the object distance is 30 mm. The object distance is set according to the comfortable distance when the handle is held by hands and the lower surface 10 of the lens cone is close to the skin of the human face, and meets the requirement of human engineering design.
As shown in fig. 5A and 5B, the CMOS selected in this embodiment is 5-megapixel 1/4lens, and the effective photosensitive matrix area of the CMOS is 2592(w) × 1944(h), so the view aspect ratio of the CMOS is 2592/1944. The CMOS device has 500 ten thousand pixels, can meet the requirement of image definition under a large shooting area, and is beneficial to later-stage skin image analysis.
Since the lens angle of view is 46.2 °, and tan (46.2/2) — (L/2)/30 ═ 0.42653614613916, L ≈ 25.8 mm, where L is the diagonal length of the lens frame.
Because of the fact thatAnd because W/H2592/1944, H is apprxeq.15.48 mm.
Therefore, it is calculated that the width W and the height H of the imaging area are: w ≈ 15.48 mm and H ≈ 20.64 mm, thereby giving a photographing area S of W ═ H ═ 15.48 ═ 20.64 ═ 319.5072 square mm as shown in fig. 5A. Thus, a large imaging area is achieved.
In order to achieve uniform light over a large shot area to obtain a sharp skin image under standard light, the light module design is shown in fig. 6 and 7. The light diffusion plate 2 of fig. 6 will be described together with fig. 3 and 7.
The light module includes a PCB aluminum substrate 22, a fixing plate 24 and a light emitting device 26. The diffusion plate 3 is disposed below the fixing plate 24 (closer to the lens barrel lower surface 1, i.e., closer to the skin direction at the time of examination), covering the light emitting device 26. The PCB aluminum substrate 22 is electrically connected to the light emitting device 26 and disposed above the fixing plate 24 (in a direction away from the lens barrel lower surface 1). A plurality of light emitting devices 26 are uniformly disposed in the fixing plate 24 at equal intervals around the circumference of the fixing plate 24. Each light emitting device 26 has a light emission angle of 120 °. Light is emitted from the light emitting device 26, passes through the diffusion plate 3 with the light transmittance of more than 80%, and is emitted into the lens barrel 2 to the surface of the skin of the human face. Due to the function of the diffusion plate 3, the light emitted from the light emitting device 26 is scattered by the diffusion plate 3 to form a uniform light emitting surface without forming a dark area on the whole plate surface, and no residual image is formed on the picture. Moreover, on the lower surface of the fixing plate 24 (closer to the lower surface 1 of the lens barrel, that is, closer to the skin during detection), the exposed position of the light emitting device 26 is removed, and a fluorescent mixture is coated on the lower surface for supplementing light emitted by the light emitting device 26, so that the light is more uniform.
The inner surface (not shown) of the lens barrel 2 is frosted to make the surface unsmooth, so that light is diffusely reflected, and the light emitted by the light emitting device 26 can form diffuse reflection after reaching the inner surface of the lens barrel 2 through the diffusion plate 3, and then is projected to the surface of the skin of a human face.
Therefore, light is supplemented by the fluorescent mixture, the diffusion plate 3 is used for softening light, the inner surface of the lens barrel 2 is used for forming diffuse reflection, and light rays emitted by the plurality of light emitting devices 26 which are uniformly distributed in an annular shape are more uniformly distributed on the skin of the human face.
In addition, in order to make the skin image display normal, it is necessary to keep the light emitted from the light emitting device 26 as standard light, i.e., light having a color temperature between 5500K and 6500K when reaching the skin. In one embodiment of the present invention, the light emitting device 26 emits light with a color temperature of 6000K, the high dominant light emitting device is selected so that the color temperature deviation range of the light is small, and the yellow fluorescent compound is selected to adjust the color temperature so that the light is standard white light after optical action of the fluorescent compound. Therefore, the light module design of this embodiment has realized when detecting the skin at every turn, and it is standard white light to shoot on the skin of people's face, and the colour temperature deviation is little, does not receive the influence of other light moreover.
The angle of view of the lens used in the above embodiment is 46.2 °, and those skilled in the art will understand that the angle of view of the lens can also be adjusted according to the focal length and the shooting area. In order to ensure the image quality without distortion, the viewing angle cannot be too small, and should be between 35 and 50 degrees.
The method is mainly characterized in that large-area high-definition skin data are acquired under a uniform light source, the influence of an external light source is avoided, continuous shooting is carried out in a fixed light wave band, and the acquired high-definition skin data can be used for processing and analyzing in the later period.
Compared with the prior art, the portable skin detector provided by the invention can meet the requirements of small size and portability, and can also shoot high-definition and distortion-free skin images with larger areas. Therefore, even if the common consumers use the portable skin detector, the complete, comprehensive and accurate skin characteristics can be captured.
The portable skin detector with a large photographing area provided by the present invention is described in detail above. Any obvious modifications to the invention, which would occur to those skilled in the art, without departing from the true spirit of the invention, would constitute a violation of the patent rights of the invention and would carry a corresponding legal responsibility.
Claims (10)
1. The utility model provides a portable skin detection appearance with big area of shooing, includes lens module, light module and with the lens cone of skin contact, its characterized in that:
the lens module comprises a lens, and the shooting area of the lens is between 15 × 15 square millimeters and 25 × 25 square millimeters;
the light module is installed around the camera lens module to be provided with the diffuser plate, so that light shines on skin evenly.
2. The portable skin test instrument of claim 1, wherein:
the field angle of the lens is 35-50 degrees.
3. The portable skin test instrument of claim 1, wherein:
the plurality of light emitting devices are uniformly arranged in the fixing plate at equal intervals;
the diffusion plate covers the light emitting device and has a light transmittance of 80% or more.
4. The portable skin test instrument of claim 3, wherein:
and a fluorescent mixture is coated on the lower surface of the fixing plate except the position exposed by the light emitting device.
5. The portable skin test instrument of claim 4, wherein:
the fluorescent mixture is yellow fluorescent mixture, so that the light emitted by the light-emitting device becomes white light under the optical action of the fluorescent mixture.
6. The portable skin test instrument of claim 4, wherein:
the inner surface of the lens barrel is subjected to frosting treatment to perform diffuse reflection.
7. The portable skin test instrument of claim 5, wherein:
the color temperature of the light emitted by the light-emitting device is 5500K-6500K.
8. The portable skin test instrument of claim 7, wherein:
the color temperature of the light emitted by the light emitting device is 6000K and is high dominant.
9. The portable skin test instrument of claim 1, wherein:
the object distance of the lens is 30 mm.
10. The portable skin test instrument of claim 1, wherein:
the lens module further comprises a CMOS photosensitive device, and the effective photosensitive matrix area of the CMOS photosensitive device is 2592 × 1944.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710923923.8A CN107837070A (en) | 2017-09-30 | 2017-09-30 | Portable skin detector with big shooting area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710923923.8A CN107837070A (en) | 2017-09-30 | 2017-09-30 | Portable skin detector with big shooting area |
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| CN107837070A true CN107837070A (en) | 2018-03-27 |
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| CN201710923923.8A Pending CN107837070A (en) | 2017-09-30 | 2017-09-30 | Portable skin detector with big shooting area |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109893096A (en) * | 2019-03-21 | 2019-06-18 | 武汉嫦娥医学抗衰机器人股份有限公司 | A kind of face image capturing apparatus for skin analysis |
| EP3838339A1 (en) * | 2019-12-20 | 2021-06-23 | Koninklijke Philips N.V. | Treatment device and method |
| CN113064316A (en) * | 2019-12-27 | 2021-07-02 | 丽宝大数据股份有限公司 | Lens device with light-shielding structure |
| CN113729626A (en) * | 2021-08-03 | 2021-12-03 | 蒋登文 | Portable skin quality detection device and system based on image recognition |
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