CN208224581U - A kind of skin image capture means - Google Patents
A kind of skin image capture means Download PDFInfo
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- CN208224581U CN208224581U CN201820812051.8U CN201820812051U CN208224581U CN 208224581 U CN208224581 U CN 208224581U CN 201820812051 U CN201820812051 U CN 201820812051U CN 208224581 U CN208224581 U CN 208224581U
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Abstract
The utility model discloses a kind of skin image capture means, device includes light source, optical imaging system, imaging sensor and signal processing circuit, it is characterised in that: the optical imaging system includes the first lens group, the second lens group, the third lens group and the lens group moving assembly of same optical axis；The position of first lens group is fixed in optical axis front end, the second lens group, the third lens group position can be changed by lens group moving assembly.The utility model has the beneficial effects that the optics operating distance of skin image capture means is fixed, when continuously changing image magnification, device does not need to leave skin, and the shake that can avoid hand causes flating, and fogging image phenomenon is caused to occur.
Description
Technical field
The utility model belongs to medical instruments field, and in particular to a kind of skin image capture means and application method.
Background technique
Dermoscopy Digital image analysis technique has been developed in recent years a kind of non-invasive skin disease diagnostic tool, uses
In skin histology internal mechanism and lesion that detection is invisible to the naked eye.Usual dermoscopy is filled by a hand-held skin image capture
It sets and is formed with computer.Hand-held skin image capture means are used for for skin optical imaging, image sensing acquisition, computer
Skin image processing display.
Dermoscopy is in use, for different diseased region situations, generally requires to adjust different image magnifications.
Its optical imaging system is all made of 1 lens group in current skin image capture means, lens when changing image magnification
Group mass motion, optics operating distance (distance of camera lens to skin) change, and skin image capture means will often leave skin,
Since skin image capture means are handheld device, without any support, the shake of hand is unavoidable, and the shake of hand is necessarily drawn
Flating is played, fogging image is caused.
Utility model content
The purpose of this utility model is to solve technical problem present in background technique, provides a kind of skin image capture dress
It sets, when continuously changing image magnification, optics operating distance is constant, and skin image capture means do not need to leave skin.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of skin image capture means, including light source, optical imaging system, imaging sensor and signal processing circuit,
It is characterized by:
The optical imaging system includes the first lens group, the second lens group, the third lens group and the lens group of same optical axis
Moving assembly；
The position of first lens group is fixed in optical axis front end；Second lens group, the third lens group position can pass through
Lens group moving assembly changes；
First lens group includes the 1st lens, the 2nd lens, the 3rd lens；1st lens are biconvex lens, the 1st lens and the 2nd
Airspace between lens is 0.25mm~0.35mm；2nd lens and the 3rd lens are concave-convex lens, the 2nd lens and the 3rd
Lens are glued together；
Second lens group includes the 4th lens, the 5th lens；4th lens are concave-convex lens, and the 5th lens are biconcave lens；4th
Lens and the 5th lens are glued together；
The third lens group includes the 6th lens, the 7th lens and the 8th lens；6th lens are biconvex lens, the 6th lens and the 7th
Airspace between lens is 0.3mm~0.4mm；7th lens and the 8th lens are concave-convex lens, and the 7th lens and the 8th are thoroughly
Mirror is glued together；
Described image sensor is connect with the signal processing circuit, is equipped in signal processing circuit and is communicated with computer
Interface.
Preferably, the lens group moving assembly includes: 1 fixed cylinder inner cylinder, 1 rotary cylinder
Outer cylinder, 2 pins (the first pin, the second pin)；Cylinder inner tube wall is provided with 1 straight trough hole, and cylinder outer tube wall is provided with 2 spirals
Slot (the first helicla flute, the second helicla flute)；Additional first pin of second lens group is placed in cylinder inner cylinder, the first pin
It is pierced by from the straight trough hole of cylinder inner tube wall to the first helicla flute of cylinder outer tube wall；The additional second pin postposition of the third lens group
In cylinder inner cylinder, the second pin is pierced by from the straight trough hole of cylinder inner tube wall to the second helicla flute of cylinder barrel；Work as cylinder
When outer cylinder rotates, the second lens group, the third lens group move up and down in cylinder inner cylinder.
Preferably, the optics operating distance of the 1st lens away from acquisition device front end is 50mm~56mm；Described second
Airspace between lens group and the first lens group is 2.75mm~16.65mm；Between the third lens group and the second lens group
Airspace be 15.26mm~5.50mm；Airspace between imaging sensor target surface and the third lens group is 77.35mm
~73.20mm.
Preferably, the focal length of first lens group is 17.71mm；The focal length of second lens group is for -6.37mm；The
The focal length of three lens groups is 19.54mm.
Preferably, the focal length 15.028mm of the 1st lens；The balsaming lens focal length-of 2nd lens and the 3rd lens
132.6mm；Balsaming lens focal length-the 6.37mm of 4th lens and the 5th lens；The focal length 15.841mm of 6th lens；7th lens and
Balsaming lens focal length-the 113.25mm of 8th lens.
Preferably, refractive index≤1.55, Abbe number >=59 of the 1st lens；Refractive index≤1.55 of 2nd lens, Ah
Shellfish number >=59；Refractive index≤1.74, Abbe number >=28 of 3rd lens；Refractive index≤1.77, Abbe number >=27 of 4th lens；The
Refractive index≤1.51, Abbe number >=60 of 5 lens；Refractive index≤1.55, Abbe number >=59 of 6th lens；The refraction of 7th lens
Rate≤1.55, Abbe number >=59；Refractive index≤1.75, Abbe number >=27 of 8th lens.
Preferably, the center thickness of the 1st lens is 1.0000mm；The center thickness of 2nd lens, the 6th lens and the 7th lens
For 0.8000mm；The center thickness of 3rd lens is 0.8233mm；The center thickness of 4th lens is 0.6404mm；5th lens
Center thickness is 0.3202mm；The center thickness of 8th lens is 0.7318mm.
Preferably, the material that the 1st lens, the 2nd lens, the 5th lens, the 6th lens, the 7th lens use is crown glass；
The material that 3rd lens, the 4th lens, the 8th lens use is flint glass.
Preferably, the interface communicated in the signal processing circuit with computer is USB interface or WIFI communication module.
The application method of above-mentioned skin image capture means:
1. skin image capture means are connect with computer, computer is opened；
2. skin image capture means are placed on skin；
3. skin image is observed by computer screen, when needing to change image magnification, as long as outside rotation cylinder
Cylinder.
The utility model has the beneficial effects that the optics operating distance of skin image capture means is fixed, continuously change image
It when amplification factor, does not need device and leaves skin, the shake that can avoid hand causes flating, and fogging image phenomenon is caused to send out
It is raw.
Detailed description of the invention
Fig. 1 is the optical imaging system light path schematic diagram of the utility model；
Fig. 2 is that cylinder inner tube wall straight trough hole in the utility model embodiment, pin and cylinder outer tube wall spiral groove location show
It is intended to.
In figure: 1- skin；2- light source；3- imaging sensor target surface；4- cylinder inner tube wall straight trough hole；The first pin of 5-；6-
Second pin；7- cylinder the first helicla flute of outer tube wall；8- cylinder the second helicla flute of outer tube wall；The 1st lens of L1-；The 2nd lens of L2-；
The 3rd lens of L3-；The 4th lens of L4-；The 5th lens of L5-；The 6th lens of L6-；The 7th lens of L7-；The 8th lens of L8-.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawing.
A kind of skin image capture means, comprising: light source, optical imaging system, imaging sensor and signal processing circuit.
The optical imaging system includes the first lens group, the second lens group, the third lens group and the lens group moving assembly of same optical axis；
The position of first lens group is fixed in optical axis front end；Second lens group, the third lens group position can be moved by lens group
Dynamic component changes；Fig. 1 is optical imaging system light path schematic diagram.Light source 2 illuminates tested skin 1, is tested skin image and passes through together
The first lens group, the second lens group, the third lens group of optical axis are imaged on imaging sensor target surface 3, imaging sensor and letter
The connection of number processing circuit, signal processing circuit carry out digitized processing to the output signal of imaging sensor, and will treated
Digital signal is sent to computer, shows skin image on computers.
When implementation, the imaging sensor uses ccd image sensor or cmos image sensor；Signal processing circuit
In be equipped with the interface that communicates with computer, using USB interface or WIFI communication module.
When implementation, the lens moving assembly includes: 1 fixed cylinder inner cylinder；1 is placed with outside cylinder inner cylinder
Rotary cylinder outer cylinder；2 pins (the first pin 5, the second pin 6)；First lens group is fixed below cylinder inner cylinder,
Imaging sensor is fixed on above cylinder inner cylinder；Cylinder inner tube wall is provided with 1 straight trough hole 4；Cylinder outer tube wall is provided with 2 helicla flutes
(the first helicla flute 7, the second helicla flute 8)；Fig. 2 is that cylinder inner tube wall straight trough hole, pin and cylinder outer tube wall spiral groove location show
It is intended to.When implementation, the groove width in the straight trough hole 4 of cylinder inner cylinder, the first helicla flute 7 of cylinder outer tube wall and the second helicla flute 8 is equal
For 4mm.
When implementation, additional first pin 5 of the second lens group is placed in cylinder inner cylinder, and the first pin 5 is from cylinder inner tube wall
Straight trough hole 4 be pierced by the first helicla flute 7 of cylinder outer tube wall；Additional second pin 6 of the third lens group is placed in cylinder
In cylinder, the second pin 6 is pierced by from the straight trough hole 4 of cylinder inner tube wall to the second helicla flute 8 of cylinder outer tube wall；I.e. pin is simultaneously
Across cylinder inner tube wall straight trough hole 4 and cylinder outer tube wall helicla flute.When the rotation of cylinder outer cylinder, helicla flute is rotated with it, due to circle
Column inner cylinder is fixed, and the first pin 5, the second pin 6 cannot be rotated with helicla flute, only moves up and down in straight trough hole 4, drives
Second lens group, the third lens group move up and down in cylinder inner cylinder, the second lens group, the third lens group position change, system
Optical magnification changes.
When implementation, the first lens group is fixed in optical axis front position, the 1st lens L1 of the first lens group away from acquisition device most
The optics operating distance of front end is 50mm~56mm；Airspace between second lens group and the first lens group be 2.75mm~
16.65mm；Airspace between the third lens group and the second lens group is 15.26mm~5.50mm；Imaging sensor target surface
Airspace between the third lens group is 77.35mm~73.20mm.
When implementation, the first lens group includes the 1st lens, the 2nd lens and the 3rd lens；1st lens are biconvex lens, focal length
15.028mm；Airspace between 1st lens and the 2nd lens is 0.25mm~0.35mm；2nd lens and the 3rd lens are
Concave-convex lens, the 2nd lens and the 3rd lens are glued together, balsaming lens focal length -132.6mm；The focal length of first lens group is
17.71mm。
Second lens group includes the 4th lens, the 5th lens；4th lens are concave-convex lens, and the 5th lens are biconcave lens；4th
Lens and the 5th lens are glued together, the focal length -6.37mm of balsaming lens, also the focal length of the second lens group be for -
6.37mm。
The third lens group includes the 6th lens, the 7th lens and the 8th lens；6th lens are biconvex lens, focal length
15.841mm, the airspace between the 6th lens and the 7th lens are 0.3mm~0.4mm；7th lens and the 8th lens are recessed
Convex lens, the 7th lens and the 8th lens are glued together, the focal length -113.25mm of balsaming lens；The focal length of the third lens group
For 19.54mm.
When implementation, focal length, refractive index, Abbe number, spherical radius, center thickness and the material of each lens be can refer in table 1
Parameter processing and fabricating.
The embodiment of 1 lens parameter of table
| Lens | Focal length (mm) | Refractive index | Abbe number | Spherical radius (mm) | Center thickness (mm) | Material |
| 1st lens | 15.028 | 1.542 | 59.39 | 16.652/-15.615 | 1.0000 | Crown glass |
| 2nd lens | 22.176 | 1.542 | 59.39 | -15.336/-6.863 | 0.8000 | Crown glass |
| 3rd lens | -19.684 | 1.734 | 28.12 | -6.8628/-13.731 | 0.8233 | Flint glass |
| 4th lens | 7.622 | 1.762 | 27.31 | -4.1536/-2.5825 | 0.6404 | Flint glass |
| 5th lens | -3.675 | 1.510 | 60.86 | -2.5825/7.1176 | 0.3202 | Crown glass |
| 6th lens | 15.841 | 1.542 | 59.39 | 39.6088/-10.888 | 0.8000 | Crown glass |
| 7th lens | 24.127 | 1.542 | 59.39 | -10.850/-6.0843 | 0.8000 | Crown glass |
| 8th lens | -20.818 | 1.746 | 27.95 | -6.0843/-10.5156 | 0.7318 | Flint glass |
When implementation, the relationship of cylinder outer cylinder rotational angle, second and third lens group position and optical magnification such as 2 institute of table
Show, adjacent data group optical magnification variation 0.1 in table 2；S21 is the spacing of the second lens group to the first lens group in table
From；S32 is the third lens group to distance between the second lens group；SB3 is between imaging sensor target surface is arrived to the third lens group
Distance.For example, it is 16.55mm that the rotation of cylinder outer cylinder, which goes to 0.77 degree: S21 from 0 degree from 16.65mm variation, illustrate that second is saturating
Microscope group position moves down 0.10mm；S32 is 5.92mm from 5.50mm variation, illustrates that the third lens group moves up: 5.92mm-
5.50mm-0.1mm=0.32mm；SB3 is that 72.88mm also illustrates that the third lens group moves up 0.32mm from 73.2mm variation.
Cylinder outer tube wall the first helicla flute 7, the second helicla flute 8 can be made by this table data mart modeling, the data more segmented can use interpolation method
It calculates.
2 cylinder outer cylinder rotational angle of table, the variation of second and third lens group position and optical magnification
As shown in table 2, the optical magnification adjustable range of this skin image capture means is 0.6~3 times, image sensing
1/3 inch, 1/4 inch of equal-specification can be used in device；According to 1/3 inch of imaging sensor (target surface size 4.8mm × 3.6mm, it is right
The long 6mm of linea angulata), computer uses 17 inch displays；Then total magnification=0.6~3 × (17 × 25.4/6)=43~216
Times.
Claims (9)
1. a kind of skin image capture means, including light source, optical imaging system, imaging sensor and signal processing circuit,
It is characterized in that:
The optical imaging system includes that the first lens group, the second lens group, the third lens group and the lens group of same optical axis are mobile
Component；
The position of first lens group is fixed in optical axis front end；Second lens group, the third lens group position can pass through lens
Group moving assembly changes；
First lens group includes the 1st lens (L1), the 2nd lens (L2), the 3rd lens (L3)；1st lens are biconvex lens, and the 1st thoroughly
Airspace between mirror and the 2nd lens is 0.25mm~0.35mm；2nd lens and the 3rd lens are concave-convex lens, and the 2nd thoroughly
Mirror and the 3rd lens are glued together；
Second lens group includes the 4th lens (L4), the 5th lens (L5)；4th lens are concave-convex lens, and the 5th lens are that concave-concave is saturating
Mirror；4th lens and the 5th lens are glued together；
The third lens group includes the 6th lens (L6), the 7th lens (L7) and the 8th lens (L8)；6th lens be biconvex lens, the 6th
Airspace between lens and the 7th lens is 0.3mm~0.4mm；7th lens and the 8th lens are concave-convex lens, and the 7th thoroughly
Mirror and the 8th lens are glued together；
Described image sensor is connect with the signal processing circuit, is connect in signal processing circuit equipped with what is communicated with computer
Mouthful.
2. a kind of skin image capture means according to claim 1, which is characterized in that the lens group moving assembly packet
It includes: 1 fixed cylinder inner cylinder, 1 rotary cylinder outer cylinder, 2 pins；Cylinder inner tube wall is provided with 1 straight trough
Hole (4), cylinder outer tube wall are provided with 2 helicla flutes；Additional first pin (5) of second lens group is placed in cylinder inner cylinder,
First pin (5) is pierced by from the straight trough hole (4) of cylinder inner tube wall to the first helicla flute (7) of cylinder outer tube wall；The third lens
Additional second pin (6) of group is placed in cylinder inner cylinder, and the second pin (6) is pierced by from the straight trough hole (4) of cylinder inner tube wall to circle
In the second helicla flute (8) of column outer tube wall；When the rotation of cylinder outer cylinder, the second lens group, the third lens group are in cylinder inner cylinder
It moves up and down.
3. a kind of skin image capture means according to claim 1 or 2, the 1st lens (L1) away from acquisition device most
The optics operating distance of front end is 50mm~56mm；Airspace between second lens group and the first lens group is
2.75mm~16.65mm；Airspace between the third lens group and the second lens group is 15.26mm~5.50mm；Image passes
Airspace between sensor target surface (3) and the third lens group is 77.35mm~73.20mm.
4. a kind of skin image capture means according to claim 1 or 2, which is characterized in that first lens group
Focal length is 17.71mm, and the focal length of the second lens group is for -6.37mm, and the focal length of the third lens group is 19.54mm.
5. a kind of skin image capture means according to claim 1 or 2, which is characterized in that the focal length of the 1st lens
The balsaming lens of 15.028mm, the balsaming lens focal length -132.6mm of the 2nd lens and the 3rd lens, the 4th lens and the 5th lens is burnt
Away from -6.37mm, the focal length 15.841mm of the 6th lens, the balsaming lens focal length -113.25mm of the 7th lens and the 8th lens.
6. a kind of skin image capture means according to claim 1 or 2, which is characterized in that the refraction of the 1st lens
Rate≤1.55, Abbe number >=59；Refractive index≤1.55, Abbe number >=59 of 2nd lens；Refractive index≤1.74 of 3rd lens, Ah
Shellfish number >=28；Refractive index≤1.77, Abbe number >=27 of 4th lens；Refractive index≤1.51, Abbe number >=60 of 5th lens；The
Refractive index≤1.55, Abbe number >=59 of 6 lens；Refractive index≤1.55, Abbe number >=59 of 7th lens；The refraction of 8th lens
Rate≤1.75, Abbe number >=27.
7. a kind of skin image capture means according to claim 1 or 2, which is characterized in that the center of the 1st lens
With a thickness of 1.0000mm；The center thickness of 2nd lens, the 6th lens and the 7th lens is 0.8000mm；The center thickness of 3rd lens
For 0.8233mm；The center thickness of 4th lens is 0.6404mm；The center thickness of 5th lens is 0.3202mm；8th lens
Center thickness is 0.7318mm.
8. a kind of skin image capture means according to claim 1 or 2, which is characterized in that the 1st lens, the 2nd are thoroughly
The material that mirror, the 5th lens, the 6th lens and the 7th lens use is crown glass；What the 3rd lens, the 4th lens and the 8th lens used
Material is flint glass.
9. a kind of skin image capture means according to claim 1 or 2, which is characterized in that the signal processing circuit
In the interface that is communicated with computer be USB interface or WIFI communication module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820812051.8U CN208224581U (en) | 2018-05-29 | 2018-05-29 | A kind of skin image capture means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820812051.8U CN208224581U (en) | 2018-05-29 | 2018-05-29 | A kind of skin image capture means |
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| Publication Number | Publication Date |
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| CN208224581U true CN208224581U (en) | 2018-12-11 |
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ID=64507161
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|---|---|---|---|
| CN201820812051.8U Active CN208224581U (en) | 2018-05-29 | 2018-05-29 | A kind of skin image capture means |
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| Country | Link |
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| CN (1) | CN208224581U (en) |
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2018
- 2018-05-29 CN CN201820812051.8U patent/CN208224581U/en active Active
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