CN102008288A - System and method for line scan confocal ophthalmoscope - Google Patents
System and method for line scan confocal ophthalmoscope Download PDFInfo
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- CN102008288A CN102008288A CN 201010595574 CN201010595574A CN102008288A CN 102008288 A CN102008288 A CN 102008288A CN 201010595574 CN201010595574 CN 201010595574 CN 201010595574 A CN201010595574 A CN 201010595574A CN 102008288 A CN102008288 A CN 102008288A
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Abstract
The invention relates to a system and method for a line scan confocal ophthalmoscope. The system comprises a linear light beam generation module, a splitting module, a scanning module, an imaging module and an output module. A linear light beam is subject to one-dimensional space scanning by the line scan confocal ophthalmoscope to illuminate fundus oculi retina, simultaneously a linear detector is used for image non-scan light beams reflected from the fundus oculi retina, the system only uses one scanning galvanometer and one linear detector, and the number of active members is small; and simultaneously, a confocal slit is conjugated with the plane of the fundus oculi retina, thereby eliminating the influence of eliminate stray light of a non-retina plane on imaging quality and obtaining high resolution by using the confocal imaging principle. The invention has the advantages of simple structure, short light path, good stability and high imaging frame frequency, is easy for manufacture and suitable for adjustment, and is small and exquisite.
Description
Technical field
The present invention relates to confocal imaging system and method in a kind of optical imaging field, the confocal Oph system and method for particularly a kind of line sweep can be widely used in biomedical ophthalmologic examination.
Background technology
The successful Application of cofocus scanning technology aspect imaging broken through the bottleneck of traditional optical imaging, can obtain high-resolution imaging, promoted the development of optical imagery detection technique.Scholars have carried out big quantity research to this technology in recent years, have realized multiple cofocus scanning imaging device.
The optical principle of cofocus scanning technology as shown in Figure 1, scanned samples is in the focal plane position of illumination objective lens, guarantee that simultaneously detector is in the focal plane position of image-forming objective lens, promptly be in the conjugate position that objective lens corresponds to each other, whole view field imaging is realized by scanning, can not enter detector image-forming for the veiling glare on the non-focal plane of scanned samples (shown in the dotted line light beam), thereby obtain the high-resolution imaging of scanned samples.
At present, in the product that adopts the cofocus scanning principle, be example with the laser cofocus scanning ophthalmoscope, this system adopts LASER Light Source LD illumination, and laser beam forms point source through illumination pin hole FO, and the every bit on the eye retina is scanned.Illuminated point on the retina, in detecting pinhole CP place's imaging, illumination pin hole FO and detecting pinhole CP are conjugated with respect to the focal plane of object lens CL, point outside the retina focal plane can be in the imaging of detecting pinhole place, the confocal images that obtains like this is amphiblestroid optics transverse section, realized high flat resolution, its concrete structure as shown in Figure 2.This spot scan confocal imaging technology, imaging effect is good, but himself has a lot of defectives: (1) optical path component is many, the light path complexity, system structure is big, uses inconvenience, should not be extensive use of; (2) need two galvanometers of horizontal sweep HS and vertical scanning VS simultaneously, movable part is many, and is wayward; (3) the luminous point energy of spot scan is small, need to use photomultiplier tube PMT or other weak spot detector, and the picture contrast that obtains is low, and frame frequency speed little (＜30fps), thereby cause the retina shake image of I picture to eliminate; (4) adopt spot scan to the optical fundus retina image-forming, need mydriasis to observe usually, and require the person of being observed to have the good ability of looking of consolidating, these are all very difficult for ophthalmic diseases patient, old man and child.These defectives have all limited its application, have particularly hindered it and have been directly used in the inspection of ophthalmic diseases.
Be directed to the many disadvantages of spot scan mode, R.Daniel Ferguson etc. has proposed a kind of method of line sweep laser ophthalmoscope, sees patent " Line-scan laser ophthalmoscope " R.Daniel Ferguson, PatentNo:US 7,284,859B2, Oct.23,2007.The device sketch map of this U.S. Patent Publication as shown in Figure 3, this device adopts 202 illuminations of laser point light source, the outgoing divergent beams of point source are through behind the cylindrical lens 204 and 206, form the Line beam of certain width and length, pass through rotary prism 208 then with its deflection outgoing, this Line beam is scanned galvanometer 210 deflection scannings, through objective lens 212,214 and 216 focus on optical fundus retina 222, the imaging beam that is reflected by retina 222 is from the pupil outgoing, through objective lens 212, after 214 and 216 transmissions, be scanned galvanometer 210 synchronous reflections to rotary prism 208, rotary prism 208 turn 90 degrees imaging beam with the outgoing of incident beam vertical separation partially and arrives diaphragm 224, diaphragm 224 and human eye pupil position conjugation, can eliminate the influence of non-conjugated veiling glare of pupil, then focused on imaging on the line array CCD by image-forming objective lens 226 from the imaging beam of diaphragm 224 outgoing, line array CCD and optical fundus retina position conjugate have been realized the high-resolution imaging of " standard " confocal principle.Whole system is seen shown in Figure 3, and dotted line is depicted as incident beam, and solid line is depicted as the imaging beam of retinal reflex.
This device adopts the one dimension line sweep to the optical fundus retina image-forming, compares and adopt the confocal laser ophthalmoscope of spot scan to have many advantages: (1) adopts Line beam illumination optical fundus, only uses a scanning galvanometer, and the movable part number is few, and system structure is little; (2) imaging beam still is a wire, adopts the line array CCD imaging, and the imaging beam energy is big, the picture contrast height that obtains, and frame frequency is big, and shake significantly reduces in the retina frame; (3) adopt Line beam illumination optical fundus, the ability of looking is not admittedly had strict demand.This device has been realized the high-resolution purpose of " standard " confocal imaging, but still there are a lot of defectives in self: (1) adopts the laser point light illumination, and light source is regulated complicated, and the beam energy skewness, is Gauss distribution; (2) for the divergent beams of point source, the Line beam generating apparatus is made up of two cylindrical lenses, and Line beam generating apparatus complex structure is regulated difficulty, and the ray beam quality that generates is bad; (3) Line beam is generated by cylindrical lens, and its Energy distribution is inhomogeneous, is Gauss distribution, and Line beam repeatedly focuses on and disperses in propagate arriving the process on optical fundus, and ray beam quality is poor; (4) scanning light beam that arrives human eye is just being given the incident beam that arrives scanning galvanometer, and incident beam is turn 90 degrees laggard line scanning partially by galvanometer, and the scan mode complexity is not easy control, and precision is low etc.
Summary of the invention
Technology of the present invention is dealt with problems: overcome above-mentioned the deficiencies in the prior art part, provide a kind of line sweep confocal Oph system and method, it is easy and effective to have Line beam control, optical path component is few, system structure is little, the one-dimensional scanning mode is simple, and advantage such as control accuracy is high and speed is fast, and imaging frame frequency is big.
Technical solution of the present invention: the confocal Oph system of a kind of line sweep comprises Line beam generation module, spectral module, scan module;
The Line beam generation module links to each other with spectral module, be used for the divergent beams of point source are generated the one dimension Line beam, it is made of point source, collimator and extender device and Line beam capture device, the divergent beams that point source sends are by collimator and extender device collimation back output collimated light beam, and the Line beam capture device is sent into spectral module with the collimated light beam intercepting of collimator and extender device output for one dimension linear light bunch; Described Line beam capture device is made up of adjustable diaphragm and adjustable slit, or form by the orthogonal adjustable slit in two sides, collimated light beam is transformed to the one dimension Line beam through adjustable diaphragm and adjustable slit successively, or is transformed to the one dimension Line beam through the orthogonal adjustable slit in two sides successively; Described collimator and extender device comprises standard 4f lens combination, filtering pin hole and collimating lens, the divergent beams of point source outgoing are focused into new point source again through standard 4f lens combination, first energy level by the new point source of filtering pin hole intercepting distributes, the energy even of filtering pin hole outgoing divergent beams distributes, and is the collimated light beam outgoing of certain radius by the collimating lens collimation then;
Spectral module is beam split plain film or Amici prism, be used for an one dimension Line beam part that the Line beam generation module is produced directly transmission arrive scan module and will carry out deflection and shine and reach the picture module from the imaging beam of scan module reflected back;
Scan module, utilize the Line beam of the direct outgoing of spectral module that human eye optical fundus retina is scanned illumination, with to from the imaging beam synchronous reflection of optical fundus retinal reflex to spectral module, it is made of scanning galvanometer and illumination objective lens group, the one dimension Line beam of the direct outgoing of spectral module scans illumination optical fundus retina through described scanning galvanometer and illumination objective lens group by scanning galvanometer successively, and the imaging beam that returns from the optical fundus retinal reflex arrives spectral module through illumination objective lens group and scanning galvanometer synchronous reflection successively;
Image-forming module, be used for converting the imaging beam light intensity signal of spectral module deflection outgoing to the signal of telecommunication, and be transferred to output module, it is made of image-forming objective lens, cylindrical lens, confocal slit and line detector, the imaging beam of spectral module deflection outgoing passes through image-forming objective lens, cylindrical lens and confocal slit, receiving track detector successively; Described confocal slit and optical fundus retinal plane conjugation;
Output module is made of image pick-up card and outut device, and image pick-up card becomes picture signal with the electrical signal conversion of image-forming module output, and exports by outut device.
The confocal Oph method of a kind of line sweep is characterized in that performing step is as follows:
Step 1, the divergent beams of point source generate the one dimension Line beam by collimator and extender device and Line beam capture device;
Step 2, described one dimension Line beam arrives scan module by the direct transmission of a spectral module part;
Step 3, scan module scans illumination by scanning galvanometer and illumination objective lens group to human eye optical fundus retina with the Line beam of the direct outgoing of spectral module, and will be from the imaging beam synchronous reflection of optical fundus retinal reflex to spectral module;
Step 4, spectral module will carry out from the imaging beam of scan module reflected back deflection shine reach the picture module;
Described step 1 comprises:
Step 81, the divergent beams that the collimator and extender device produces point source collimate and expand bundle and be collimated light beam;
Step 82, the Line beam capture device is the one dimension Line beam with described collimated light beam intercepting.
Described step 5 comprises:
Step 91, image-forming objective lens and cylindrical lens are focused into wire with the imaging beam of spectral module deflection outgoing, then the receiving track detector;
Step 92, the imaging beam light intensity signal after line detector will focus on converts the signal of telecommunication to.
Described step 6 comprises:
Step 101, image pick-up card becomes picture signal with the electrical signal conversion of line detector output;
Step 102, outut device receive described picture signal, show, handle, and storage is also printed.
Described point source is LASER Light Source or light emitting diode or super-radiance light emitting diode;
Described scanning galvanometer is the reflective scanning mode galvanometer;
Described illumination objective lens group is a standard 4f lens combination;
Described cylindrical lens is a plain edition plano-convex cylindrical lens;
Described line detector is linear charge-coupled array or linear array complementary metal oxide semiconductors (CMOS) array or linear array photodiode array;
Described outut device is a computer.
The present invention compares with the line sweep laser ophthalmoscope of prior art, and following advantage is arranged:
(1) the confocal Oph system and method for line sweep of the present invention, collimator and extender device outgoing beam is the collimated light beam of certain radius, beam energy is evenly distributed, and regulates easy.
(2) the confocal ophthalmoscope of line sweep of the present invention, the Line beam capture device is made up of adjustable diaphragm and adjustable slit, directly regulate length and the width that its clear aperture can determine Line beam, simple installation not only, the operation debugging easily, and the degree of regulation height, can realize control requirement to the different size Line beam.
(3) the confocal Oph system and method for line sweep of the present invention, confocal slit and optical fundus retina conjugation have been got rid of the influence of non-retina conjugate planes veiling glare to image quality, have realized the high-resolution of confocal imaging principle.
(4) the confocal Oph system and method for line sweep of the present invention, scanning light beam and imaging beam are equidirectional wire, Line beam distributes along same axle all the time, and propagate along primary optical axis all the time, scanning galvanometer and line detector clock are easy synchronously, image configuration speed is fast, the picture frame frequency height, and real-time performance is good.
(5) the confocal Oph system and method for line sweep of the present invention, the illumination objective lens group is a standard 4f lens combination, and scanning light beam is accurately focused on the optical fundus retinal plane, scanning light beam is translation vertically, illuminates whole retinal surface imaging.
(6) the confocal Oph system and method for line sweep of the present invention, only use a scanning galvanometer and a line detector, the movable part number is few, have simple in structure, make that easy, light path is shortly suitablely regulated, small and exquisitely is suitable for, the advantage of good stability and high imaging frame frequency, be suitable for making and extensively promoting the use of in a large number.
Description of drawings
Fig. 1 is the optical schematic diagram of cofocus scanning;
Fig. 2 adopts the confocal laser ophthalmoscope light path sketch map of spot scan for prior art;
Fig. 3 is a prior art line sweep laser ophthalmoscope light path sketch map;
Fig. 4 is the confocal ophthalmoscope system construction drawing of line sweep of the present invention;
Fig. 5 is the confocal ophthalmoscope system line of a line sweep of the present invention light beam generation module sketch map;
Fig. 6 is the confocal ophthalmoscope light path of a line sweep of the present invention sketch map.
The specific embodiment
As shown in Figure 4, be the confocal ophthalmoscope system construction drawing of line sweep of the present invention, the confocal ophthalmoscope of line sweep of the present invention system comprises Line beam generation module 1, spectral module 2, scan module 3, image-forming module 5 and output module 6.
Line beam generation module 1 links to each other with spectral module 2, constitute by point source 100, collimator and extender device 110 and Line beam capture device 120, be used for the divergent beams of point source 100 are generated the one dimension Line beam, the divergent beams that point source 100 sends are by collimator and extender device 110 collimation back output collimated light beams, and Line beam capture device 120 is sent into spectral module 2 with the collimated light beam intercepting of collimator and extender device 110 outputs for one dimension linear light bunch.
Spectral module 2 is beam split plain film or Amici prism, be used for an one dimension Line beam part that Line beam generation module 1 is produced directly transmission arrive scan module 3 and will carry out deflection and shine and reach picture module 5 from the imaging beam of scan module 3 reflected backs.
Scan module 3 is made of scanning galvanometer 300 and illumination objective lens group 310, the Line beam that is used to utilize spectral module 2 direct outgoing to optical fundus retina 4 scan illumination and to from the imaging beam synchronous reflection of optical fundus retina 4 reflections to spectral module 2.The Line beam of spectral module 2 direct outgoing successively through scanning galvanometer 300 and illumination objective lens group 310 by scanning galvanometer scanning illumination optical fundus retina 4, pass through illumination objective lens group 310 and scanning galvanometer 300 synchronous reflections successively to spectral module 2 from the imaging beam of optical fundus retina 4 reflections.
Image-forming module 5 is made of image-forming objective lens 500, cylindrical lens 510, confocal slit 520 and line detector 530, is used for converting the imaging beam light intensity signal of spectral module 2 deflection outgoing to the signal of telecommunication, and is transferred to output module 6.The imaging beam of spectral module 2 deflection outgoing passes through image-forming objective lens 500, cylindrical lens 510 and confocal slit 520 successively, receiving track detector 530, confocal slit 520 and optical fundus retina 4 planar conjugates, confocal slit 520 can be got rid of non-optical fundus retina 4 planar veiling glares and enter line detector 530, thereby realizes the high-resolution of confocal imaging principle.
As shown in Figure 5, Line beam generation module 1 is made of point source 100, collimator and extender device 110 and Line beam capture device 120.The divergent beams of point source 100 outgoing are focused into new point source again through standard 4f lens combination 111, first energy level by the new point source of filtering pin hole 112 interceptings distributes, the energy even of its outgoing divergent beams distributes, and is the collimated light beam outgoing of certain radius by collimating lens 113 collimations then.Line beam capture device 120 is the one dimension Line beam with the outgoing collimated light beam intercepting of collimator and extender device 110, form by adjustable diaphragm 121 and adjustable slit 122, the length of adjustable diaphragm 121 transparent aperture decision transmitted beam, the width of adjustable slit 122 printing opacity width decision transmitted beam, when slit width is very little (μ m level), be approximately the one dimension Line beam,, can be met the Line beam of system requirements by the transparent aperture of adjustable diaphragm 121 and adjustable slit 122 is set.Line beam capture device 120 also can be made up of the orthogonal adjustable slit in two sides, the length of the printing opacity width decision light beam of horizontal narrow slit, the vertically width of the printing opacity width of slit decision light beam.
As shown in Figure 4, the confocal ophthalmoscope method of line sweep of the present invention may further comprise the steps:
Step 1, the divergent beams of point source 100 are collimated light beam by collimator and extender device 110 collimations and expansion bundle;
Step 2, Line beam capture device 120 is the one dimension Line beam with the collimated light beam intercepting;
Step 3, the one dimension Line beam arrives scan module 3 by the direct transmission of spectral module 2 a part of luminous energy;
Step 4, the Line beam of spectral module 2 direct outgoing scans illumination by the scanning galvanometer in the scan module 3 310 and 320 pairs of optical fundus retinas 4 of illumination objective lens group;
Step 7, the imaging beam of spectral module 2 deflection outgoing is focused into wire through image-forming objective lens 500 and cylindrical lens 510, and the receiving track detector 530 then;
Step 8, the imaging beam light intensity signal after line detector 530 will focus on converts the signal of telecommunication to;
Step 9, image pick-up card 600 converts the electrical signal to picture signal;
Step 10, outut device 610 receives institute's picture signal, shows, handles, and storage is also printed.
As shown in Figure 6, be the confocal ophthalmoscope light path of line sweep of the present invention sketch map, dotted line is depicted as system's primary optical axis, all elements are all arranged along primary optical axis, and clear aperture is contour with one heart, and light beam is all propagated along system's primary optical axis, be illustrative nature among the figure, do not represent real optical design parameter.
Point source is LASER Light Source or light emitting diode or super-radiance light emitting diode, and what adopt in the present embodiment is LASER Light Source, and wavelength is the infrared light of 830nm.
The collimator and extender device comprises standard 4f lens combination, filtering pin hole and collimating lens, and it is that standard 4f lens combination, 80nm filtering pin hole and the focal length that 20mm forms is the collimating lens of 50mm that present embodiment adopts two focal lengths.
The Line beam capture device is made up of adjustable diaphragm and adjustable slit, or is made up of the orthogonal adjustable slit in two sides, adopts the stand upright APID22-1 adjustable diaphragm and the APAS80-1A adjustable slit of Chinese light of Beijing to form in the present embodiment.
Spectroscope is beam split plain film or Amici prism, adopts Amici prism in the present embodiment.
Scanning galvanometer is the reflective scanning mode galvanometer, adopts the model 6210H type product of CT company in the present embodiment, and effectively face width is 3mm.
The illumination objective lens group is a standard 4f lens combination, and adopting two focal lengths in the present embodiment is the standard 4f lens combination that 50mm forms.
Image-forming objective lens 7 adopts lens, and its focal length is 140mm.
Cylindrical lens adopts the flat convex cylindrical lenses of plain edition, and its focal length is 100mm.
Confocal slit is an adjustable slit, adopts the stand upright APAS80-1A of Chinese light of Beijing in the present embodiment, its position and optical fundus retinal plane conjugation.
Line detector is linear charge-coupled array or linear array complementary metal oxide semiconductors (CMOS) array or linear array photodiode array, adopts the line array CCD of e2v company in the present embodiment, and the line pixel is 1024, and pixel dimension is 14 μ m * 14 μ m.
The present invention does not limit to and above-mentioned example, and persons skilled in the art can adopt numerous embodiments to realize the present invention according to content disclosed by the invention.
The non-elaborated part of the present invention belongs to techniques well known.
Claims (10)
1. the confocal Oph system of line sweep is characterized in that: comprise Line beam generation module, spectral module, scan module;
The Line beam generation module links to each other with spectral module, be used for the divergent beams of point source are generated the one dimension Line beam, it is made of point source, collimator and extender device and Line beam capture device, the divergent beams that point source sends are by collimator and extender device collimation back output collimated light beam, and the Line beam capture device is sent into spectral module with the collimated light beam intercepting of collimator and extender device output for one dimension linear light bunch; Described Line beam capture device is made up of adjustable diaphragm and adjustable slit, or form by the orthogonal adjustable slit in two sides, collimated light beam is transformed to the one dimension Line beam through adjustable diaphragm and adjustable slit successively, or is transformed to the one dimension Line beam through the orthogonal adjustable slit in two sides successively; Described collimator and extender device comprises standard 4f lens combination, filtering pin hole and collimating lens, the divergent beams of point source outgoing are focused into new point source again through standard 4f lens combination, first energy level by the new point source of filtering pin hole intercepting distributes, the energy even of filtering pin hole outgoing divergent beams distributes, and is the collimated light beam outgoing of certain radius by the collimating lens collimation then;
Spectral module is beam split plain film or Amici prism, be used for an one dimension Line beam part that the Line beam generation module is produced directly transmission arrive scan module and will carry out deflection and shine and reach the picture module from the imaging beam of scan module reflected back;
Scan module, utilize the Line beam of the direct outgoing of spectral module that human eye optical fundus retina is scanned illumination, with to from the imaging beam synchronous reflection of optical fundus retinal reflex to spectral module, it is made of scanning galvanometer and illumination objective lens group, the one dimension Line beam of the direct outgoing of spectral module scans illumination optical fundus retina through described scanning galvanometer and illumination objective lens group by scanning galvanometer successively, and the imaging beam that returns from the optical fundus retinal reflex arrives spectral module through illumination objective lens group and scanning galvanometer synchronous reflection successively;
Image-forming module, be used for converting the imaging beam light intensity signal of spectral module deflection outgoing to the signal of telecommunication, and be transferred to output module, it is made of image-forming objective lens, cylindrical lens, confocal slit and line detector, the imaging beam of spectral module deflection outgoing passes through image-forming objective lens, cylindrical lens and confocal slit, receiving track detector successively; Described confocal slit and optical fundus retina conjugation;
Output module is made of image pick-up card and outut device, and image pick-up card becomes picture signal with the electrical signal conversion of image-forming module output, and exports by outut device.
2. the confocal Oph system of a kind of line sweep according to claim 1 is characterized in that: described point source is LASER Light Source or light emitting diode or super-radiance light emitting diode.
3. the confocal Oph system of a kind of line sweep according to claim 1 is characterized in that: described scanning galvanometer is the reflective scanning mode galvanometer; Described illumination objective lens group is a standard 4f lens combination; Described cylindrical lens is a plain edition plano-convex cylindrical lens.
4. the confocal Oph system of a kind of line sweep according to claim 1 is characterized in that: described line detector is linear charge-coupled array or linear array complementary metal oxide semiconductors (CMOS) array or linear array photodiode array.
5. the confocal Oph system of a kind of line sweep according to claim 1 is characterized in that: described outut device is a computer.
6. confocal Oph method of line sweep is characterized in that performing step is as follows:
Step 1, the divergent beams of point source generate the one dimension Line beam by collimator and extender device and Line beam capture device;
Step 2, described one dimension Line beam arrives scan module by the direct transmission of a spectral module part;
Step 3, scan module scans illumination by scanning galvanometer and illumination objective lens group to human eye optical fundus retina with the Line beam of the direct outgoing of spectral module, and will be from the imaging beam synchronous reflection of optical fundus retinal reflex to spectral module;
Step 4, spectral module will carry out from the imaging beam of scan module reflected back deflection shine reach the picture module;
Step 5, image-forming module converts the imaging beam light intensity signal of spectral module deflection outgoing to the signal of telecommunication, and is transferred to output module;
Step 6, the image pick-up card in the output module becomes picture signal with the electrical signal conversion of image-forming module output, and exports by outut device.
7. the confocal Oph method of a kind of line sweep according to claim 6 is characterized in that described step 1 comprises:
Step 81, the divergent beams that the collimator and extender device produces point source collimate and expand bundle and be collimated light beam;
Step 82, the Line beam capture device is the one dimension Line beam with described collimated light beam intercepting.
8. the confocal Oph method of a kind of line sweep according to claim 6 is characterized in that described step 5 comprises:
Step 91, image-forming objective lens and cylindrical lens are focused into wire with the imaging beam of spectral module deflection outgoing, then the receiving track detector;
Step 92, the imaging beam light intensity signal after line detector will focus on converts the signal of telecommunication to.
9. the confocal Oph method of a kind of line sweep according to claim 6 is characterized in that described step 6 comprises:
Step 101, image pick-up card becomes picture signal with the electrical signal conversion of line detector output;
Step 102, outut device receive described picture signal, show, handle, and storage is also printed.
10. the confocal Oph method of a kind of line sweep according to claim 6 is characterized in that: described point source is LASER Light Source or light emitting diode or super-radiance light emitting diode;
Described collimator and extender device comprises standard 4f lens combination, filtering pin hole and collimating lens, and the divergent beams collimator and extender that is used for point source is a collimated light beam;
Described Line beam capture device is made up of adjustable diaphragm and adjustable slit, or is made up of the orthogonal adjustable slit in two sides, is used for the collimated light beam intercepting of collimator and extender device output is the one dimension Line beam;
Described scanning galvanometer is the reflective scanning mode galvanometer, and the illumination objective lens group is a standard 4f lens combination;
Described cylindrical lens is a plain edition plano-convex cylindrical lens;
Described line detector is linear charge-coupled array or linear array complementary metal oxide semiconductors (CMOS) array or linear array photodiode array;
Described outut device is a computer.
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