CN204500623U - The device of the point-to-point projection of a kind of near-infrared vein blood vessel video picture - Google Patents
The device of the point-to-point projection of a kind of near-infrared vein blood vessel video picture Download PDFInfo
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- CN204500623U CN204500623U CN201520017110.9U CN201520017110U CN204500623U CN 204500623 U CN204500623 U CN 204500623U CN 201520017110 U CN201520017110 U CN 201520017110U CN 204500623 U CN204500623 U CN 204500623U
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Abstract
The utility model discloses the device of the point-to-point projection of a kind of near-infrared vein blood vessel video picture, comprise projector, photographic head, projector, photographic head are all installed on shell, also be provided with projector and photographic head control unit in shell, photographic head is surperficial towards imaging object, for taking look-out station, and captured image data is sent to projector and photographic head control unit, the original image that projector and photographic head control unit will gather, through Digital Image Processing, output signal; Projector to run off vascular the digital signal of contour images for receiving projector and photographic head control unit, and projects image objects surface; Near-infrared light source is installed on shell, and near-infrared light source is to imaging object surface throw light.The apparatus structure of the point-to-point projection of this utility model near-infrared vein blood vessel video picture is simple, esy to use, safe and reliable.
Description
Technical field
This utility model belongs to medical imaging detection technique field, is specifically related to the Optical devices of a kind of image acquisition and point-to-point projection.
Background technology
When body surface each several part is irradiated by visible light wave range (390-780nm), because its reflection just can produce the visible image of human eye.But some object is to the absorption reflection not obvious difference of visible ray; During radiation of visible light, human eye cannot be discovered, if the electromagnetic wave using its all band instead irradiates, such as near infrared light, just may produce the reflection-absorption of notable difference, the image presented although it is so cannot be arrived by eye-observation, but can be transformed the visible image of formation human eye by some Electro-Optical Sensor Sets.Such as, the people that some colour of skin is comparatively dark or fat deposit is partially thick, cannot clearly observe Internal vein profile information, and when with near infrared light, then can produce the reflectance of notable difference, forms image.Photodetector by near infrared band detects this image, then modulates visible ray with the view data detected, in-situ projection back in one's hands, just can observe the clear profile of vein.
Therefore, to the interior of articles information that human eye can not directly be observed, can by the spectral signature of object analysis, the light of certain specific wavelength (black light) is selected to carry out irradiating object, and gather image information with corresponding photodetector, again by visible wavelength wave band light, project image onto the surface of object, being so just equivalent to human eye just can observed objects internal information intuitively.This utility model proposes based on this principle.
Summary of the invention
Throw in for the image realizing camera collection realizes image 1:1 ratio through projector, the utility model discloses a kind of device for the point-to-point projection of near-infrared vein blood vessel video picture.
For achieving the above object, this utility model takes following technical scheme: the device of the point-to-point projection of a kind of near-infrared vein blood vessel video picture, comprise projector, photographic head, projector, photographic head are all installed on shell, projector and photographic head control unit are also installed in shell, photographic head is towards imaging object surface, for taking look-out station, and captured image data is sent to projector and photographic head control unit, the original image that projector and photographic head control unit will gather, through Digital Image Processing, output signal; Projector to run off vascular the digital signal of contour images for receiving projector and photographic head control unit, and projects image objects surface; Near-infrared light source is installed on shell, and near-infrared light source is to imaging object surface throw light.
Preferably, photographic head installs a 850nm narrow band pass filter additional, and photographic head is surperficial towards imaging object by 850nm narrow band pass filter.
Preferably, near-infrared light source by many 850nm wavelength LED and mix the area source that even tabula rasa forms.
This utility model tool has the following advantages: image and the real image of projection match completely, can indiscriminate " covering " in real image.Can appear in one's mind on top layer by 1:1 projection for interior tissue imagings such as blood vessels, realize visual.
The apparatus structure of the point-to-point projection of this utility model near-infrared vein blood vessel video picture is simple, esy to use, safe and reliable, make subcutaneous indistinct shallow-layer vein blood vessel realize former, etc. large display, alleviate the work strain degree of medical personnel, significantly improve success rate of venous puncture, patient's pain can be alleviated, reduce doctor-patient dispute, especially be suitable for child patient and special disease patient.
Accompanying drawing explanation
Fig. 1 is camera imaging principle schematic.
Fig. 2 is projector schematic diagram.
Fig. 3 is the apparatus structure schematic diagram of the point-to-point projection of near-infrared vein blood vessel video picture.
Fig. 4 is debugging image lattice schematic diagram.
In Fig. 3,1-projector, 2-photographic head, 3-projector and photographic head control unit, 4-infrared light sources, 5-shell positioner, 6-imaging object surface, 7-infrared narrow band filter.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model preferred embodiment is elaborated.
Throw in for the image realizing camera collection realizes image 1:1 ratio through projector, first need to analyze the principle of photographic head, projector imaging, to help to play directive function in the process of experiment.Photographic head and projector are all based on lens imaging, and camera imaging is a picture reduced, and projector imaging is a picture amplified, and analyze below in conjunction with the imaging law of lens and practical application exploitation.
1, camera imaging principle
Camera imaging is the image that a handstand is reduced, as shown in Figure 1.
The focal length of camera lens, visual field size and camera lens as follows to the relation of the distance being ingested object:
F: lens focus
D: subject is to the distance of camera lens
H: visual horizontal width (subject is imaging width on ccd target surface)
H: the horizontal width of subject.
The size of photographic head shooting picture and distance are linear.Be incorporated herein a new concept, photographic head and shooting change the ratio of the Distance geometry shooting picture horizontal width in face ratio of making a video recording, shown in 1-3:
2, projector image-forming principle
The imaging process of projector imaging and photographic head is just contrary, as shown in Figure 2.
In projector, a most important concept projects ratio exactly:
Project the ability than being reaction projector projects picture size, the image that it is thrown is an enlarged image, and the distance along with projector becomes far away, and the image thrown in constantly amplifies.
The image size that the image size obtained due to photographic head and projector are thrown in and their distance have direct relation, the shooting of setting forth photographic head above than and the projection of projector than being exactly the ability of reacting photographic head shooting picture size and projector input picture size.
Overlapping to realize picture 1:1, just needing photographic head shooting picture size and projector to export the relation that picture size is 1:1.Because the transverse and longitudinal of picture is than being fixing, at this width value getting image level as reference.Such as formula 3-1
(formula 3-1)
In ratio---the pantograph ratio of the width of the horizontal width of this subject and projector actual input picture, reaction be difference between the two,
value more close to 1, illustrate subject and projected picture difference less, both registrations are higher.
(formula 3-2)
Learnt by formula 3-2, the pantograph ratio of picture and distance, shooting than, projection than contacting directly, the D when the focus coincidence of photographic head and projector
c=D
p, abbreviation obtains formula 3-3:
(formula 3-3)
Final 1:1 projection only and shooting than, project than relevant, their ratio
also be the scaling in image scaling process.
Photographic head and the whole positioner of projector are as shown in Figure 3.
Adopt the projector with off-axis function, the relative position of adjustment photographic head and projector observes projected image, and the reference object of photographic head as shown in Figure 4.
See Fig. 3, projector 1, photographic head 2 and projector and photographic head control unit 3 are installed in shell positioner 5, photographic head 2 is towards imaging object surface 6, it is for taking look-out station, and captured image data is sent to photographic head and projector control unit module 3, photographic head 2 is primarily of photo-sensitive cell and camera lens composition, photo-sensitive cell can respond to the highly sensitive CCD of Infrared, camera lens adopts the camera lens of large depth of field small size, makes shooting distance a larger scope.Near-infrared light source 4 is installed on shell positioner 5, and it is to imaging object surface 6 throw lights, and it adopts by the LED of many 850nm wavelength and mix even tabula rasa and forms area source, for shooting provides infrared illumination.Photographic head and projector control unit 3 are displaies, the original image that it can gather, and through Digital Image Processing, and are converted into the signal that optical projection system can identify and export.Projector 1 to run off vascular the digital signal of contour images for receiving photographic head and projector control unit 3, and projects image objects surface 6.Photographic head and projector control unit 3 can adopt prior art.
Because photographic head and projector are different for image taking and the ability of throwing in size, export and just need that according to previously described principle, convergent-divergent control is carried out to the image of photographic head shooting in order to equal proportion can be realized and throw in again.
In order to the impact that the light source of the visible ray and external environment that reduce projector projects is taken photographic head, install a slice 850nm narrow band pass filter 7 additional in the front portion of photographic head 2, photographic head 2 passes through this infrared narrow band filter 7 towards imaging object surface 6.This infrared narrow band filter 7 can only allow the infrared light of the wave band near 850nm to enter photographic head.
Fig. 4 is the shooting image debugged for point-to-point projection, takes this image by photographic head, and by projection out, observes the deviation of former figure and projected image, to determine whether to accomplish that 1:1 projects.
Above this utility model preferred embodiment is described in detail, for those of ordinary skill in the art, detailed description of the invention will change, and these changes also should be considered as protection domain of the present utility model.
Claims (3)
1. the device of the point-to-point projection of near-infrared vein blood vessel video picture, comprise projector, photographic head, it is characterized in that: projector, photographic head are all installed on shell, also be provided with projector and photographic head control unit in shell, photographic head is surperficial towards imaging object, for taking look-out station, and captured image data is sent to projector and photographic head control unit, the original image that projector and photographic head control unit will gather, through Digital Image Processing, output signal; Projector to run off vascular the digital signal of contour images for receiving projector and photographic head control unit, and projects image objects surface; Near-infrared light source is installed on shell, and near-infrared light source is to imaging object surface throw light.
2. the device of the point-to-point projection of near-infrared vein blood vessel video picture as claimed in claim 1, is characterized in that: photographic head installs a 850nm narrow band pass filter additional, and photographic head is surperficial towards imaging object by 850nm narrow band pass filter.
3. the device of the point-to-point projection of near-infrared vein blood vessel video picture as claimed in claim 1, is characterized in that: near-infrared light source by many 850nm wavelength LED and mix the area source that even tabula rasa forms.
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| CN201520017110.9U CN204500623U (en) | 2015-01-09 | 2015-01-09 | The device of the point-to-point projection of a kind of near-infrared vein blood vessel video picture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104605819A (en) * | 2015-01-09 | 2015-05-13 | 深圳元华医疗设备技术有限公司 | Device and method for near-infrared vein angiography point-to-point projection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104605819A (en) * | 2015-01-09 | 2015-05-13 | 深圳元华医疗设备技术有限公司 | Device and method for near-infrared vein angiography point-to-point projection |
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