CN106483665A - Eyepiece formula wears vein display optical system - Google Patents
Eyepiece formula wears vein display optical system Download PDFInfo
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- CN106483665A CN106483665A CN201611231828.3A CN201611231828A CN106483665A CN 106483665 A CN106483665 A CN 106483665A CN 201611231828 A CN201611231828 A CN 201611231828A CN 106483665 A CN106483665 A CN 106483665A
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- vein
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- lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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Abstract
A kind of eyepiece formula for assisted IV injection wears vein display optical system, medical personnel can be helped to judge vessel position, improve intravenous success rate.This optical system is by near infrared imaging object lens, CCD receptor, penetration eyepiece and micro-display composition.Skin surface by the near infrared light specific region of 760nm, near infrared imaging system is by the vein imaging under specific region on CCD, CCD is by the information transfer collected to computer, being sent to operation wavelength after computer enhancement information is 660nm micro-display, final micro-display projects in the visual field of wearer by the vein image that penetration eyepiece will be seen that, this vein image is equal with actual venous locations formed objects.This systemic resolution up to 1024 × 768, than existing vein display system, have that simple and compact for structure, numerical aperture is big, high resolution and gently littleization the features such as.
Description
Technical field
The invention belongs to optical imagery instrument field, it is related to a kind of novel optical system showing for vein.
Technical background
Intravenous injection is a kind of conventional and effective clinical treatment means.But some patients have, and blood vessel is relatively thin, the colour of skin
The features such as relatively depth and fat deposit are thicker, the accurate location of their blood vessels is difficult to judge, intravenous injection is difficult successfully, to bring not
Necessary misery.Additionally, medical personnel are in order to see purifies the blood, commonly used tourniquet, this also brings discomfort to patient.Pass through
Non-contacting method accurately judges that vessel position has practical significance.
Therefore multiple utilization near infrared spectrums absorption characteristic (skin and subcutaneous fat relatively low to Near-infrared Spectral Absorption and
Blood is contrary) vein imager in succession proposed to improve intravenous injection rate.Existing vein imager mostly is desk-top aobvious
As instrument (U.S.Patent D566,283, U.S.Patent 5,519,208) and hand-held imager (U.S.Patent 9,
061,109、U.S.Patent 8,255,040).Desk-top imager is not portable, and hand-held imager brings not for operator
Just.(product E yes-on of Evena's medical company for this reason, a kind of portable commercialization vein display glasses arise at the historic moment
Glasses).The gross weight of this system is 311.85g, but the structure of its optical system, weight and performance do not have been reported that.
2014, Zhai Yi reported the design that a projection wears vein display system, and its near infrared imaging system and optics show
System is the object lens of double gauss structure, has the characteristics that low distortion and ultrahigh resolution.But this projection type display system is entered
The light entering eyes will bring the more loss of energy twice through half-transmitting and half-reflecting mirror.
As wearing display system, not only to have excellent optical property, also will have simple and compact for structure, lightweight
And the features such as small volume.
Content of the invention
The purpose of the present invention is to overcome the shortcomings of above-mentioned vein display instrument, provides a kind of novel optical showing for vein
System, to be accurately judged to patient's venous locations, improves intravenous success rate.
Eyepiece formula provided by the present invention for assisted IV injection wears vein display optical system, including：CCD receives
Device, near infrared imaging object lens, micro-display and penetration eyepiece.
, by vein imaging in CCD receptor, CCD receptor and micro-display are with computer even for described near infrared imaging object lens
Connect, by penetration eyepiece, micro-display will be seen that vein image projects into the wearer visual field.
Described eyepiece formula wears the skin that vein display optical system passes through the near infrared light specific region of 760nm
Surface, by the vein imaging in specific 64mm × 48mm region of 320mm object distance on CCD, CCD will receive near infrared imaging object lens
The information of collection passes through data line transfer to computer, and being sent to operation wavelength by data wire after computer enhancement information is
660nm micro-display, the vein image that final micro-display be will be seen that by penetration eyepiece is projected with 14 ° of maximum field of view
In the visual field of the wearer at emergent pupil.
Described near infrared imaging object lens can be imaged to 64mm × 48mm effective coverage of 320mm object distance.
The exit pupil diameter of described penetration eyepiece is 10mm, and distance of exit pupil is 50mm, and maximum field of view angle is 14 °.
The target surface effective coverage of the detector of described CCD receptor is 4.76mm × 3.57mm, and resolution is XGA-1024
× 768, pixel dimension is 4.65 μm of 4.65 μ m, and image planes resolution is determined by the nyquist frequency of CCD：
Wherein f is nyquist frequency, i.e. image planes resolution, and α is one-dimensional pixel dimension, calculates nyquist frequency f
=107 (lp/mm).
Described near infrared imaging object lens hereby cut down lens by four-piece type and form, and the radius of curvature of first piece lens is respectively
14.897mm and 52.258mm, the radius of curvature of second lens is respectively -24.593mm and -33.684mm, the 3rd lens
Radius of curvature be respectively 18.030mm and -43.069mm, the radius of curvature of the 4th lens be respectively -8.985mm with -
55.060mm, the convex surface of first piece lens is secondary aspherical simultaneously, and secondary term coefficient is -0.422.
The effective coverage of described micro-display is 9.83mm × 7.37mm, and resolution is XGA-1024 × 768, operating wave
A length of 660nm, nyquist frequency is 107lp/mm.
By a piece of convex lens, a piece of double gluing mirrors and semi-transparent semi-reflecting lens form described penetration eyepiece, the curvature of convex lens
Radius is respectively 20.795mm and -89.406mm, and convex lens radius of curvature is the face of 20.795mm is secondary aspherical, secondary term system
Number is -0.730, and the radius of curvature of double gluing mirrors is respectively 18.927mm and -236.768mm and 11.323mm, semi-transparent semi-reflecting
Mirror is located on emitting light path and the angle at 45 ° with light path, and reflecting surface is towards wearer's eyes.
Advantages of the present invention and effective effect
First, due to using secondary aspherical, the monocular system quality of near infrared imaging object lens and penetrating type eyepiece composition is not
More than 22g, the weight of biocular systems imaging is less than 44g, and optical system is light and handy.
2nd, the camera lens number that system uses is few, simple and compact for structure.
3rd, near infrared imaging object lens have the large-numerical aperture of F/1.59, beneficial to the weak near-infrared reflection photoimaging of collection.
4th, the excellent in optical properties of near infrared imaging object lens and penetrating type eyepiece, resolution can reach 1024 × 768.
5th, in systems only once through half-transmitting and half-reflecting mirror, energy loss is low for light.
6th, clearly vein image and extraneous things can be simultaneously observed after operator wears, obtain more true body
Test.
Brief description
Fig. 1 shows System Working Principle schematic diagram for vein.
Fig. 2 is near infrared imaging system structure diagram.
Fig. 3 wears display system schematic diagram for penetrating type eyepiece.
Fig. 4 is the vertical axial aberration characteristic curve of near infrared imaging object lens.
Fig. 5 is the curvature of field and the distortion of near infrared imaging object lens.
Fig. 6 is modulation transfer function (MTF) (MTF) curve of near infrared imaging object lens.
Fig. 7 is the vertical axial aberration characteristic curve of penetrating type eyepiece.
Fig. 8 is the curvature of field and the distortion of penetrating type eyepiece.
Fig. 9 is modulation transfer function (MTF) (MTF) curve of penetrating type eyepiece.
Specific embodiment
Vein display System Working Principle schematic diagram as shown in Figure 1, described eyepiece formula wears vein display optical system
Irradiate the skin surface 1-1 of specific region by the near infrared light light source of 760nm, near infrared imaging system (CCD receptor near
Infrared imaging object lens) to computer 1-3, computer 1-3 will transmit after information enhancement the 1-2 information transfer of collecting vein image
To penetration eyepiece system (micro-display with penetration eyepiece) 1-4, the vein image that penetration eyepiece system 1-4 will be seen that with
14 ° of maximum field of view projects in the visual field of wearer's eyes 1-5 at emergent pupil.
Near infrared imaging object lens as shown in Figure 2, near infrared imaging object lens 2-1 hereby cuts down object lens by four-piece type and forms, closely red
Outer image-forming objective lens 2-1 collects and is carried the near infrared light imaging of venae subcutaneae information on 2-2CCD by skin reflex.Consider
Intravenous be actually needed, we select irradiation area be set as 64mm × 48mm, skin surface is apart near infrared imaging
The distance of object lens is set as 320mm.In order to make full use of effective target surface (4.76mm × 3.57mm) of CCD, the putting of objective system
Big rate is 0.0744.The axial aberration difference from fig. 4, it can be seen that the maximum in zero visual field, 0.7 visual field and full filed for this system is hung down
For 19.1 μm, 20.9 μm, 26.8 μm.From figure) 5 understand, this system maximum curvature of field is 0.023mm, and relative distortion maximum is only
0.34%.Fig. 6 is MTF under zero visual field, 0.7 visual field and full filed for the near infrared imaging system, as seen from the figure in space frequency
At rate 107cycles/mm, the mtf value of three visual fields is all higher than 0.5, and the image quality of near infrared imaging object lens is excellent.Near-infrared
The effective focal length of image-forming objective lens is 21.429mm, and F number is 1.59, and back work distance is 4.526mm, and weight is only 7g.It is specifically tied
Structure is given by table 1：
The structural parameters of table 1 near infrared imaging object lens
Fig. 3 wears display system schematic diagram for penetrating type eyepiece, and penetrating type eyepiece wears display system by eyepiece 3-
1, semi-transparent semi-reflecting lens 3-2 and micro-display 3-3 composition, wherein 3-4 is system emergent pupil.3-3 passes through 3-1 and 3-2 by vein image
Project in the human eye visual field of 3-4, human eye can observe extraneous things by 3-2 simultaneously.Particular skin surface region
To the subtended angle of wearer at 14 ° about, therefore the maximum angle of visual field of eyepiece is 14 ° it is considered to the comfort level of wearer and people's eye pupil
The change of bore dia, therefore exit pupil diameter are 10mm.Because wearer also needs to see while observing the vein image of 3-2 reflection
Examine the external information of spectroscope transmission, need light path is transferred, this needs sufficient distance of exit pupil, therefore distance of exit pupil is
50mm.Display system worn by penetrating type eyepiece is reversal design, and Fig. 5 gives the characteristic curve on its micro-display face.Figure
7-9 is respectively vertical axial aberration characteristic curve, the curvature of field and distortion and modulation transfer function (MTF) (MTF) curve of system.Permissible from Fig. 7
Find out, the vertical axial aberration of maximum of zero visual field, 0.7 visual field and full filed is respectively 2.4 μm, 19.1 μm, 40.3 μm.Can from Fig. 8
Know, maximum curvature of field value is 0.17mm, for the curvature of field of helmet system, generally to be weighed with the diopter (D) of the out of focus of human eye, root
According to Newton's formula, its conversion relation is：
In formula, x is the system maximum curvature of field value being represented with mm, and f' is effective focal length, and unit is mm.Substitute into corresponding data,
The maximum curvature of field obtaining this system is 0.068D.For headgear system, this is very little.Relative distortion maximum is only
0.372%, meet the design requirement that table 2 provides.Fig. 9 for penetrating type eyepiece wear display system zero visual field, 0.7 visual field and
MTF under full filed, as seen from the figure at spatial frequency 107cycles/mm, the mtf value of three visual fields is all higher than 0.31, meets
The display of XGA mode image requires.The effective focal length of eyepiece is 49.778mm, and weight is only 15g.Its concrete structure is given by table 2
Go out：
The structural parameters of table 2 eyepiece
Claims (8)
1. a kind of eyepiece formula for assisted IV injection wears vein display optical system it is characterised in that described optical system
System includes：CCD receptor, near infrared imaging object lens, micro-display and penetration eyepiece；
By vein imaging in CCD receptor, CCD receptor and micro-display are connected described near infrared imaging object lens with computer,
By penetration eyepiece, micro-display will be seen that vein image projects into the wearer visual field.
2. eyepiece formula according to claim 1 wears vein display optical system it is characterised in that described CCD receptor
The target surface effective coverage of detector is 4.76mm × 3.57mm, and resolution is XGA-1024 × 768, and pixel dimension is 4.65 μ m
4.65 μm, image planes resolution is determined by the nyquist frequency of CCD：
Wherein f is nyquist frequency, i.e. image planes resolution, and α is one-dimensional pixel dimension, calculates f=107 (lp/mm).
3. eyepiece formula according to claim 1 wears vein display optical system it is characterised in that described near-infrared becomes
Form as object lens hereby cut down lens by four-piece type, the radius of curvature of first piece lens is respectively 14.897mm and 52.258mm, the
The radius of curvature of two lens is respectively -24.593mm and -33.684mm, and the radius of curvature of the 3rd lens is respectively
18.030mm and -43.069mm, the radius of curvature of the 4th lens is respectively -8.985mm and -55.060mm, first piece simultaneously
The convex surface of lens is secondary aspherical, and secondary term coefficient is -0.422.
4. eyepiece formula according to claim 3 wears vein display optical system it is characterised in that described near-infrared becomes
As object lens can be imaged to 64mm × 48mm effective coverage of 320mm object distance.
5. eyepiece formula according to claim 1 wears vein display optical system it is characterised in that described micro-display
Effective coverage be 9.83mm × 7.37mm, resolution be XGA-1024 × 768, operation wavelength be 660nm, nyquist frequency
For 107lp/mm.
6. eyepiece formula according to claim 1 wears vein display optical system it is characterised in that described penetration mesh
Mirror by a piece of convex lens, a piece of double gluing mirrors and semi-transparent semi-reflecting lens composition, the radius of curvature of convex lens be respectively 20.795mm with-
89.406mm, convex lens radius of curvature is the face of 20.795mm is secondary aspherical, and secondary term coefficient is -0.730, double gluing mirrors
Radius of curvature is respectively 18.927mm and -236.768mm and 11.323mm, semi-transparent semi-reflecting lens be located on emitting light path and with light
Road angle at 45 °, reflecting surface is towards wearer's eyes.
7. eyepiece formula according to claim 6 wears vein display optical system it is characterised in that described penetration mesh
The exit pupil diameter of mirror is 10mm, and distance of exit pupil is 50mm, and maximum field of view angle is 14 °.
8. the eyepiece formula according to any one of claim 1 to 7 wears vein display optical system it is characterised in that described
Optical system passes through the skin surface of the near infrared light specific region of 760nm, and near infrared imaging object lens are by specific region
Vein imaging on CCD, CCD by collect information by data line transfer arrive computer, computer will after information enhancement lead to
Crossing data wire and being sent to operation wavelength is 660nm micro-display, the vein that final micro-display be will be seen that by penetration eyepiece
Image projects in the visual field of the wearer at emergent pupil.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611231828.3A CN106483665B (en) | 2016-12-28 | 2016-12-28 | Eyepiece formula wears vein display optical system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611231828.3A CN106483665B (en) | 2016-12-28 | 2016-12-28 | Eyepiece formula wears vein display optical system |
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| CN106483665A true CN106483665A (en) | 2017-03-08 |
| CN106483665B CN106483665B (en) | 2019-06-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108937849A (en) * | 2017-05-29 | 2018-12-07 | 王虎 | One kind indicating system for the imaging of tumour nano target fluorescence probe and surgical navigational |
| CN111190285A (en) * | 2020-02-18 | 2020-05-22 | 中国人民解放军陆军工程大学 | Multi-aperture single-detector optical imaging system |
| CN111240033A (en) * | 2020-02-18 | 2020-06-05 | 中国人民解放军陆军工程大学 | Multi-aperture single-detector cross view field imaging system |
| CN112558292A (en) * | 2020-10-09 | 2021-03-26 | 天津大学 | Small optical system capable of switching virtual and real imaging |
Citations (3)
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| US20140341441A1 (en) * | 2013-05-20 | 2014-11-20 | Motorola Mobility Llc | Wearable device user authentication |
| CN105044925A (en) * | 2015-08-28 | 2015-11-11 | 江苏鼎云信息科技有限公司 | Intelligent visual vascular imaging spectacles equipment |
| CN105137590A (en) * | 2015-09-28 | 2015-12-09 | 深圳纳德光学有限公司 | Large-field-of-view (LFOV) eyepiece optical system |
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2016
- 2016-12-28 CN CN201611231828.3A patent/CN106483665B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140341441A1 (en) * | 2013-05-20 | 2014-11-20 | Motorola Mobility Llc | Wearable device user authentication |
| CN105044925A (en) * | 2015-08-28 | 2015-11-11 | 江苏鼎云信息科技有限公司 | Intelligent visual vascular imaging spectacles equipment |
| CN105137590A (en) * | 2015-09-28 | 2015-12-09 | 深圳纳德光学有限公司 | Large-field-of-view (LFOV) eyepiece optical system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108937849A (en) * | 2017-05-29 | 2018-12-07 | 王虎 | One kind indicating system for the imaging of tumour nano target fluorescence probe and surgical navigational |
| CN111190285A (en) * | 2020-02-18 | 2020-05-22 | 中国人民解放军陆军工程大学 | Multi-aperture single-detector optical imaging system |
| CN111240033A (en) * | 2020-02-18 | 2020-06-05 | 中国人民解放军陆军工程大学 | Multi-aperture single-detector cross view field imaging system |
| CN112558292A (en) * | 2020-10-09 | 2021-03-26 | 天津大学 | Small optical system capable of switching virtual and real imaging |
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| CN106483665B (en) | 2019-06-04 |
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