CN106618480A - Image acquisition unit having tomography capacity - Google Patents
Image acquisition unit having tomography capacity Download PDFInfo
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- CN106618480A CN106618480A CN201510433004.3A CN201510433004A CN106618480A CN 106618480 A CN106618480 A CN 106618480A CN 201510433004 A CN201510433004 A CN 201510433004A CN 106618480 A CN106618480 A CN 106618480A
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Abstract
The invention provides a tomography system applicable to a digital single-lens reflex camera. According to the system, a built-in flash lamp of the digital single-lens reflex camera is taken as a light source, an image sensor of the camera is used as a sensor, and a purpose of imaging is achieved on the basis of the principle of a frequency-domain short-coherence interferometer. In type B tomography of the tomography system, a penetrating depth exceeds 2mm, a longitudinal resolution rate is lower than 1 micron and a sensitivity is greater than 80dB, so that the function of the digital single-lens reflex camera is effectively increased, and the tomography system has the characteristics of being high in speed, simple in structure and flexible in imaging and the system has a transmission function. The tomography system can be widely applied to commercial counterfeit currency detection, industrial thickness measurement, medical skin disease diagnosis, medical dental analysis, biological tissue and criminal investigation science sample analysis, and the like.
Description
Technical field
The present invention relates to a kind of output optical transport by digital single lens reflex camera collects the imaging system that specular scattering light obtains parallel spectrum signal to measurand and by interferometer and spectrometer, a kind of image acquisition units with Type B tomoscan ability are particularly related to.
Background technology
Since short-coherence interferometer was applied to medical-ophthalmologic imaging from 91 years, develop rapidly, its sensitivity is high, longitudinal rate respectively is high, fireballing feature makes its application constantly widen.Domain optical uniformity layer scanning technology is even more greatly to be applied nearly ten years, is gathered by frequency-region signal and is analyzed, and, without the need for being modulated to reference loop, optical system is more stable, and image taking speed and signal sensitivity are greatly improved for interferometer.Nm -1300 nm of dominant wavelength ranges 800 of optical homogeneity tomoscan.
Traditional frequency domain optical homogeneity tomoscan obtains Type B faultage image, it is still desirable to line style scanning is carried out to testee, this demand makes optical system relative complex, while being accurately positioned for line style optical pickocff is needed, it is difficult to portability.
On the other hand, digital camera, particularly digital single lens reflex camera is developed rapidly in last decade.The sensitivity of imageing sensor is improved constantly, and cost constantly declines, and optional lens focus scope is more varied.Most single lens reflex camera built-in flash, flash lamp frequency spectrum includes whole visible-range and most of nm of near infrared band 400-1000.
In view of the reason for the above, digital camera application can be realized into a kind of new effect is good, security performance is high, simple to operate, energy effectively utilizes digital camera resource invention is imperative in optical homogeneity tomoscan.
The content of the invention
The purpose of the present invention is by the following technical programs implementing.
A kind of output optical transport by digital single lens reflex camera collects the imaging system that specular scattering light obtains parallel spectrum signal to measurand and by interferometer and spectrometer, and it includes interferometer and spectrometer.For the line style flash lamp on digital camera to project a line on the surface of testee, and do not have the frequency spectrum of any specular scattering light in gathering line, be recorded on digital camera image sensors.
The computed tomography (SPECT) system also includes carrying out the technology that parallel Fourier transform obtains multichannel longitudinal direction A type tomography signals using the frequency spectrum of parallel acquisition.
What the present invention can bring has the beneficial effect that：Without the need for mechanical line style scanning, without the need for additionally supplying electricity to imaging system, obtain obtaining the ability of c-type tomography perspective view after tomoscan and tomography synthesis.
Description of the drawings
By the following description that embodiments of the invention are combined with its accompanying drawing, it will be further appreciated that the purpose of the invention, specific structure features and advantages.Wherein, accompanying drawing.
Fig. 1 is module composition and working principle figure of the connection present invention to digital single lens reflex camera.
Fig. 2 is the light path schematic diagram of this application.
Specific embodiment
The present invention is to propose a kind of system for carrying out fault imaging using digital single lens reflex camera, and it has Type B fault imaging function, and longitudinal frame is higher than 1 micron, can meet medical diagnosis, including ophthalmology, dept. of dermatology and dentistry fault imaging demand.The system is observed and under-developed area medical diagnosis for personal health focus, with important practice significance.
Highly preferred embodiment of the present invention provides a kind of faultage image acquisition method, and it carries out the ability of Function Extension using digital camera itself light source and sensor.
In Fig. 1, digital camera users press shutter, and built-in flash 1 sets according to TTL, sends the broadband light of 1ms or so（Including the most of and near infrared light of visible ray）.Each luminous point is collimated by lens 2 on line style flash lamp 1, into michelson interferometer（By 3,4,5,6,7 and 8 compositions）.In object light path, incident light is reflexed to lens by spectroscope 3, and 4, and subject is illuminated, 5.Measured object reflects and scattered light is by lens, and 4 return spectroscopes, and 5.Wherein projection part reaches camera image sensor by aperture 11, reflective mirror 10, lens 12, diffraction grating 13 and camera lens 14.In reference path, the transmitted light that incident light passes through spectroscope 3, by lens 6, neutral density filter 7 is reflected through same optical path and returns spectroscope 3 in speculum 8, through reaching camera sensor 15 with object light path identical path.
When the optical path difference very little of object light path and reference path, interference fringe is modulated through diffraction grating, and on camera sensor surface interferometric modulator frequency spectrum is formed.Frequency spectrum is made to arrange according to x-axis direction, per a line（Identical y values）Obtain a frequency spectrum.Fourier anti-change is carried out to the frequency spectrum, the depth specular scattering intensity section signal of measured position, i.e. A types tomography signal is obtained.
Diverse location on flash lamp xenon lamp, diverse location on correspondence measured object measurement line, the different rows on camera image sensor（Y values）Upper formation different modulating frequency spectrum.After the frequency spectrum to all rows carries out inverse fourier transform, permutation A type tomography signal can constitute Type B faultage image.
It is horizontal display of the light path part along light arrival priority in figure one in Fig. 2.Due to reflection and scattering on testee, light is twice through lens 4 and spectroscope 3.Reference path is identical with the path of object light path.
To sum up told, faultage image imaging system of the present invention, it is only necessary to before being fixed on digital single lens reflex camera, fixed by bayonet socket, by testee and camera vertical direction horizontal, you can carry out IMAQ.Image-forming module is passive module, camera flash-light and imageing sensor automatic synchronization, is exposed time and shutter setting.
The description of above preferred embodiment enables those skilled in the art to manufacture or using the present invention.The various modifications of these embodiments will be apparent to the person skilled in the art, and the General Principle for defining here can be applied in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention is not limited to shown here embodiment, and to meet the broadest scope consistent with the principle and novel feature that disclose here.
Claims (5)
1. a kind of system that fault imaging is realized by digital single lens reflex camera, it is characterised in that:Can the material high to transmissivity carry out tomoscan；Light source is obtained from digital camera, camera output light is conducted to testee；Meanwhile, imaging system gathers the specular scattering light of testee, and by interferometer light path and spectrometer light path, the frequency domain data most collected at last is delivered in real time the photosensitive sensor of digital camera.
2. computed tomography (SPECT) system according to claim 1, it is characterised in that:Using the built-in flash of digital single lens reflex camera as light source, the imageing sensor of camera itself is imaged the system as sensor.
3. computed tomography (SPECT) system according to claim 1, it is characterised in that：It is imaged using the principle of frequency domain short-coherence interferometer, using Parallel testing multiline message collection is carried out.
4. computed tomography (SPECT) system according to claim 1, it is characterised in that:The collection of image, calculating, imaging can be completed all in itself in digital camera；Imaging calculating can complete output image in digital camera can be shown by camera screen, and imaging calculating can also download to terminal or upload onto the server and carry out, and carry out image synthesis and analysis.
5. smart jack according to claim 1, it is characterised in that:Using camera built-in flash, power without the need for extra, and the imageing sensor automatic synchronization of camera, it is easy to use, safe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510433004.3A CN106618480A (en) | 2015-07-22 | 2015-07-22 | Image acquisition unit having tomography capacity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510433004.3A CN106618480A (en) | 2015-07-22 | 2015-07-22 | Image acquisition unit having tomography capacity |
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| CN106618480A true CN106618480A (en) | 2017-05-10 |
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| CN201510433004.3A Pending CN106618480A (en) | 2015-07-22 | 2015-07-22 | Image acquisition unit having tomography capacity |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1806092A1 (en) * | 2006-01-10 | 2007-07-11 | Kabushiki Kaisha TOPCON | A fundus observation device |
| CN102710845A (en) * | 2012-01-18 | 2012-10-03 | 广州宝胆医疗器械科技有限公司 | Mobile phone with microscope and OCT (optical coherence tomography) functions |
| CN103959040A (en) * | 2011-08-21 | 2014-07-30 | 摩巴尔欧西提有限责任公司 | Attaching optical coherence tomography systems onto smartphones |
| CN203885474U (en) * | 2013-08-24 | 2014-10-22 | 北京高景弘毅科技发展有限公司 | Slit lamp camera with flash function |
| CN104688179A (en) * | 2015-03-17 | 2015-06-10 | 天津大学 | Mobile phone photo taking accessory for taking medical photos |
-
2015
- 2015-07-22 CN CN201510433004.3A patent/CN106618480A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1806092A1 (en) * | 2006-01-10 | 2007-07-11 | Kabushiki Kaisha TOPCON | A fundus observation device |
| CN103959040A (en) * | 2011-08-21 | 2014-07-30 | 摩巴尔欧西提有限责任公司 | Attaching optical coherence tomography systems onto smartphones |
| CN102710845A (en) * | 2012-01-18 | 2012-10-03 | 广州宝胆医疗器械科技有限公司 | Mobile phone with microscope and OCT (optical coherence tomography) functions |
| CN203885474U (en) * | 2013-08-24 | 2014-10-22 | 北京高景弘毅科技发展有限公司 | Slit lamp camera with flash function |
| CN104688179A (en) * | 2015-03-17 | 2015-06-10 | 天津大学 | Mobile phone photo taking accessory for taking medical photos |
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Application publication date: 20170510 |
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