CN106483665B - Eyepiece formula wears vein display optical system - Google Patents
Eyepiece formula wears vein display optical system Download PDFInfo
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- CN106483665B CN106483665B CN201611231828.3A CN201611231828A CN106483665B CN 106483665 B CN106483665 B CN 106483665B CN 201611231828 A CN201611231828 A CN 201611231828A CN 106483665 B CN106483665 B CN 106483665B
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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
It is a kind of for assisted IV injection eyepiece formula wear vein display optical system, medical staff can be helped to judge vessel position, improve the success rate of intravenous injection.The optical system is made of near infrared imaging object lens, CCD receiver, penetration eyepiece and micro-display.Pass through the skin surface of the near infrared light specific region of 760nm, near infrared imaging system is by the vein imaging under specific region on CCD, the information of collection is transferred to computer by CCD, it is 660nm micro-display that operation wavelength is transmitted to after computer enhancement information, final micro-display is projected in the visual field of wearer by the vein image that penetration eyepiece will be seen that, the vein image is equal with actual venous locations same size.The systemic resolution is up to 1024 × 768, compared with existing vein display system, has the characteristics that simple and compact for structure, numerical aperture is big, high resolution and light and smallization.
Description
Technical field
The invention belongs to optical imagery instrument fields, are related to a kind of novel optical system shown for vein.
Technical background
Intravenous injection is a kind of common and effective clinical treatment means.However some patients have that blood vessel is relatively thin, the colour of skin
The features such as relatively depth and thicker fat deposit, the accurate location of their blood vessels are difficult to judge, are injected intravenously and are not easy success, bring not
Necessary pain.In addition, in order to see blood vessel clearly tourniquet is commonly used, this also brings discomfort to patient in medical staff.Pass through
Non-contacting method accurate judgement vessel position has practical significance.
Therefore it is a variety of using near infrared spectrum absorption characteristic (skin and subcutaneous fat it is lower to Near-infrared Spectral Absorption and
Blood is opposite) vein imager proposed in succession to improve intravenous injection rate.Existing vein imager is mostly 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 is that operator brings not
Just.(the product E yes-on of Evena's medical company for this purpose, a kind of portable commercialization vein display glasses come into being
Glasses).The total weight of the system is 311.85g, however 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 near infrared imaging system and optics are shown
System is the object lens of double gauss structure, has the characteristics that low distortion and ultrahigh resolution.However the projection type display system into
The light for entering eyes will pass through half-transmitting and half-reflecting mirror twice, bring the more loss of energy.
As display system is worn, not only there is excellent optical property, also to have simple and compact for structure, light-weight
And the features such as small in size.
Summary of the invention
The purpose of the present invention is overcoming the shortcomings of above-mentioned vein display instrument, a kind of novel optical shown for vein is provided
System improves the success rate of intravenous injection to be accurately judged to patient's venous locations.
Vein display optical system is worn provided by the present invention for the eyepiece formula of assisted IV injection, comprising: CCD is received
Device, near infrared imaging object lens, micro-display and penetration eyepiece.
The near infrared imaging object lens connect vein imaging in CCD receiver, CCD receiver and micro-display and computer
It connects, micro-display will be seen that vein image is projected into the wearer visual field by penetration eyepiece.
The eyepiece formula wears vein display optical system and passes through the skin of the near infrared light specific region of 760nm
Surface, by the vein imaging in the specific region 64mm × 48mm of 320mm object distance on CCD, CCD will be received near infrared imaging object lens
The information of collection is transferred to computer by data line, is transmitted to operation wavelength by data line after computer enhancement information and is
660nm micro-display, final micro-display are projected by the vein image that penetration eyepiece will be seen that with 14 ° of maximum field of view
In the visual field of wearer at emergent pupil.
The near infrared imaging object lens can to 320mm object distance the effective coverage 64mm × 48mm imaging.
The exit pupil diameter of the penetration eyepiece is 10mm, and distance of exit pupil 50mm, maximum field of view angle is 14 °.
The target surface effective coverage of the detector of the CCD receiver is 4.76mm × 3.57mm, resolution ratio XGA-1024
× 768, pixel dimension is 4.65 μm of 4.65 μ m, and image planes resolution ratio is determined by the nyquist frequency of CCD:
Wherein f is nyquist frequency, i.e. image planes resolution ratio, and α is one-dimensional pixel dimension, calculates to obtain nyquist frequency f
=107 (lp/mm).
The near infrared imaging object lens hereby cut down lens by four-piece type and form, and the radius of curvature of first lens is respectively
14.897mm and 52.258mm, the radius of curvature of second lens are respectively -24.593mm and -33.684mm, third piece 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, while the convex surface of first lens is secondary aspherical, two-term coefficient is -0.422.
The effective coverage of the micro-display is 9.83mm × 7.37mm, and resolution ratio is XGA-1024 × 768, operating wave
A length of 660nm, nyquist frequency 107lp/mm.
The penetration eyepiece is by a piece of convex lens, a piece of double glued mirrors and semi-transparent semi-reflecting lens composition, the curvature of convex lens
Radius is respectively 20.795mm and -89.406mm, and the face that convex lens radius of curvature is 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 be located on emitting light path and with optical path angle at 45 °, reflecting surface is towards wearer's eyes.
Advantages of the present invention and effective effect
One, due to using secondary aspherical, the monocular system quality that near infrared imaging object lens and penetrating type eyepiece are constituted is not
More than 22g, the weight of biocular systems imaging is no more than 44g, and optical system is light and handy.
Two, the camera lens number that system uses is few, simple and compact for structure.
Three, near infrared imaging object lens have the large-numerical aperture of F/1.59, are conducive to collect weak near-infrared reflection light imaging.
Four, the excellent in optical properties of near infrared imaging object lens and penetrating type eyepiece, resolution ratio can reach 1024 × 768.
Five, light only once passes through half-transmitting and half-reflecting mirror in systems, and energy loss is low.
Six, operator can observe clearly vein image and extraneous things simultaneously after wearing, and obtain more true body
It tests.
Detailed description of the invention
Fig. 1 is that vein shows System Working Principle schematic diagram.
Fig. 2 is near infrared imaging system structure diagram.
Fig. 3 is that penetrating type eyepiece wears display system schematic diagram.
Fig. 4 is the vertical axial aberration characteristic curve of near infrared imaging object lens.
Fig. 5 is the curvature of field and distortion of near infrared imaging object lens.
Fig. 6 is modulation transfer function (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 distortion of penetrating type eyepiece.
Fig. 9 is modulation transfer function (MTF) curve of penetrating type eyepiece.
Specific embodiment
Vein as shown in Figure 1 shows System Working Principle schematic diagram, and the 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 receiver and close
Infrared imaging object lens) information that vein image is collected is transferred to computer 1-3 by 1-2, and computer 1-3 will be transmitted after information enhancement
To penetration eyepiece system (micro-display and 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 the 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 cut down object lens by four-piece type and form, close red
Outer image-forming objective lens 2-1 collects the near infrared light imaging by the carrying venae subcutaneae information of skin reflex on 2-2CCD.It considers
The actual needs of intravenous injection, the irradiation area that we select are set as 64mm × 48mm, and 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, objective system is put
Big rate is 0.0744.From fig. 4, it can be seen that maximum vertical axial aberration difference of the system in zero visual field, 0.7 visual field and full filed
It is 19.1 μm, 20.9 μm, 26.8 μm.From figure) 5 it is found that the system maximum curvature of field is 0.023mm, relative distortion maximum value is only
0.34%.Fig. 6 is MTF of the near infrared imaging system under zero visual field, 0.7 visual field and full filed, as seen from the figure in space frequency
At rate 107cycles/mm, the mtf value of three visual fields is all larger 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 4.526mm, weight is only 7g.It is specifically tied
Structure is provided by table 1:
The structural parameters of 1 near infrared imaging object lens of table
Fig. 3 is that penetrating type eyepiece wears display system schematic diagram, 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 for vein image
It projects in the human eye visual field of 3-4, while human eye can observe extraneous things by 3-2.Particular skin surface region
To the subtended angle of wearer at 14 ° or so, therefore the maximum field angle of eyepiece is 14 °, considers the comfort level and human eye pupil of wearer
The variation of bore dia, therefore exit pupil diameter is 10mm.Since wearer also needs to see while observing the vein image of 3-2 reflection
The external information for examining spectroscope transmission, needs to transfer optical path, this needs sufficient distance of exit pupil, therefore distance of exit pupil is
50mm.It is to reverse-engineer that penetrating type eyepiece, which wears display system, 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) curve of system.It can be with from Fig. 7
Find out, the vertical axial aberration of the maximum of zero visual field, 0.7 visual field and full filed is respectively 2.4 μm, 19.1 μm, 40.3 μm.It can from Fig. 8
Know, maximum curvature of field value is 0.17mm, for the curvature of field of helmet system, usually with diopter (D) Lai Hengliang of the defocus of human eye, root
According to Newton's formula, conversion relation are as follows:
In formula, x is the system maximum curvature of field value indicated with mm, and f' is effective focal length, unit mm.Corresponding data is substituted into,
The maximum curvature of field for obtaining the system is 0.068D.For headgear system, this is very little.Relative distortion maximum value is only
0.372%, meet the design requirement that table 2 provides.Fig. 9 be 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 larger than 0.31, meets
The display requirement of XGA mode image.The effective focal length of eyepiece is 49.778mm, and weight is only 15g.Its specific structure is given by table 2
Out:
The structural parameters of 2 eyepiece of table
Claims (6)
1. a kind of eyepiece formula for assisted IV injection wears vein display optical system, it is characterised in that the optical system
System includes: CCD receiver, near infrared imaging object lens, micro-display and penetration eyepiece；
By vein imaging in CCD receiver, CCD receiver and micro-display are connect the near infrared imaging object lens with computer,
Micro-display will be seen that vein image is projected into the wearer visual field by penetration eyepiece；
The near infrared imaging object lens hereby cut down lens by four-piece type and form, and the radius of curvature of first lens is respectively
14.897mm and 52.258mm, the radius of curvature of second lens are respectively -24.593mm and -33.684mm, third piece 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 material of first lens and third piece lens is LAKN12, and the material of second lens is SF8, and the 4th thoroughly
The material of mirror is SF54；First lens with a thickness of 4mm, the spacing of first lens and second lens is 1.65mm, the
Two lens with a thickness of 3mm, the spacing of second lens and third piece lens is 6.5mm, third piece lens with a thickness of
The spacing of 5mm, third piece lens and the 4th lens is 5.5mm, the 4th lens with a thickness of 1.2mm.
2. eyepiece formula according to claim 1 wears vein display optical system, it is characterised in that the CCD receiver
The target surface effective coverage of detector is 4.76mm × 3.57mm, and resolution ratio is XGA-1024 × 768, and pixel dimension is 4.65 μ ms
4.65 μm, image planes resolution ratio is determined by the nyquist frequency of CCD receiver:
Wherein f is nyquist frequency, i.e. image planes resolution ratio, and α is one-dimensional pixel dimension, calculates to obtain f=107 (lp/mm).
3. eyepiece formula according to claim 1 wears vein display optical system, it is characterised in that the near-infrared at
As object lens can to 320mm object distance the effective coverage 64mm × 48mm imaging.
4. eyepiece formula according to claim 1 wears vein display optical system, it is characterised in that the micro-display
Effective coverage be 9.83mm × 7.37mm, resolution ratio be XGA-1024 × 768, operation wavelength 660nm, nyquist frequency
For 107lp/mm.
5. eyepiece formula according to claim 1 wears vein display optical system, it is characterised in that the penetration mesh
Mirror is by a piece of convex lens, a piece of double glued mirrors and semi-transparent semi-reflecting lens composition, the radius of curvature of convex lens be respectively 20.795mm with-
89.406mm, the face that convex lens radius of curvature is 20.795mm are secondary aspherical, and two-term coefficient is -0.730, the material of convex lens
For SK5, convex lens with a thickness of 6.2mm, the spacing of convex lens and double glued mirrors is 0.22mm, and the radius of curvature of double gluing mirrors is respectively
18.927mm and -236.768mm and 11.323mm, the material for the eyeglass that radius of curvature is 18.927mm and -236.768mm are
PK2, with a thickness of 5.7mm, radius of curvature is 236.768mm and the material of the eyeglass of 11.323mm is SF1, semi-transparent with a thickness of 2mm
Semi-reflective mirror be located on emitting light path and with optical path angle at 45 °, reflecting surface is towards wearer's eyes；The penetration eyepiece goes out
Pupil diameter is 10mm, and distance of exit pupil 50mm, maximum field of view angle is 14 °.
6. eyepiece formula according to any one of claims 1 to 5 wears vein display optical system, it is characterised in that described
For optical system by the skin surface of the near infrared light specific region of 760nm, near infrared imaging object lens will be in specific region
Vein imaging on CCD receiver, the information of collection is transferred to computer by data line by CCD receiver, and computer will
Being transmitted to operation wavelength by data line after information enhancement is 660nm micro-display, and final micro-display passes through penetration eyepiece
It will be seen that vein image project in the visual field of the wearer at emergent pupil.
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| CN201611231828.3A CN106483665B (en) | 2016-12-28 | 2016-12-28 | Eyepiece formula wears vein display optical system |
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|---|---|---|---|
| CN201611231828.3A CN106483665B (en) | 2016-12-28 | 2016-12-28 | Eyepiece formula wears vein display optical system |
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| 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 |
| CN115128826B (en) * | 2020-02-18 | 2023-04-25 | 中国人民解放军陆军工程大学 | Multi-aperture single-detector cross-field imaging system |
| 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 |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| US20140341441A1 (en) * | 2013-05-20 | 2014-11-20 | Motorola Mobility Llc | Wearable device user authentication |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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