CN104125382A - Integrated multi-CCD collecting reading camera - Google Patents
Integrated multi-CCD collecting reading camera Download PDFInfo
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- CN104125382A CN104125382A CN201410356751.7A CN201410356751A CN104125382A CN 104125382 A CN104125382 A CN 104125382A CN 201410356751 A CN201410356751 A CN 201410356751A CN 104125382 A CN104125382 A CN 104125382A
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Abstract
The invention provides an integrated multi-CCD collecting reading camera which comprises a camera lens. An emergent optical path of the camera lens is provided with a first light split device, the first light split device divides incident light into two beams and respectively emits the two beams to two second light split devices, and the second light split devices divide the incident light into two beams and respectively emit the two beams to two CCD image sensors fixed on high-precision translation tables. Imaging can be performed on a plurality of CCD image sensors simultaneously by utilizing the light split devices, the CCD image sensors are respectively fixed on the high-precision translation tables, the corresponding CCD image sensors can be driven to move through movement of the high-precision translation tables, and the defocusing step length can be read accurately while a plurality of images are collected in real time. The integrated multi-CCD collecting reading camera is simple in structure and convenient to carry.
Description
Technical field
The present invention relates to camcorder technology field, specifically the many CCD of a kind of integrated form gather reading camera.
Background technology
Light wave is made up of intensity and phase place, but light vibration (reaches 10 too soon
15hz), electronic equipment can only measure time-average intensity.This is very unfortunate, for example, because the phase place of light wave can disclose prior object information (degree of depth).Utilize the phase place retrieval technique of intensity calculating phase place all significant for fields such as astronomy, X ray phase contrast imaging, diffraction optics, wave surface reconstruct.Phase place retrieval technique based on intensity transmission equation (TIE:Transport of Intensity Equation) is a kind of important research topic, this technology only need to be measured the distribution of light intensity in several planes vertical with optical axis, just can carry out by solving second order differential equation the space phase of reconstruct light wave, avoid the problem such as resolution, sensitiveness causing due to interferometric method.This equation is as follows:
Under normal circumstances, I (x, y, z) and φ (x, y, z) represent respectively intensity and the phase place of focussing plane, and k represents wave number, and between wavelength X, meets k=2 π/λ, and z represents propagation distance.In (1) formula, intensity differential
calculating directly have influence on the precision that whole equation calculates.It's a pity, this can not directly be measured.Therefore,, in actual experiment, conventionally use the difference approximation of 4 width intensity images to substitute (as shown in Figure 1),
In above formula, I
1and I
2represent that decentre focusedimage I distance is the overfocus image of Δ z and 2 Δ z respectively, I
-1and I
-2represent the burnt image of owing that decentre focusedimage I distance is Δ z and 2 Δ z respectively.Here, Δ z is called and defocuses step-length.That is to say, the TIE that solves (1) formula needs 5 width intensity images altogether.Although common video camera (camera) can gather image easily, cannot directly obtain the numerical value that defocuses step delta z.
Existing common camera all can only gather intensity image in the market, can not directly show distance mobile between focussing plane and out-of-focus plane.Chinese patent CN102281394B provides a kind of Portable acquiring reading camera, and this video camera can read distance parameter in gathering intensity image.But this video camera has some limitations, for example, can only gather 1 width image at every turn, repeatedly measure and could obtain multiple image, cannot meet the requirement of experiment Real-time Obtaining multiple image, between monitoring camera and spiral micrometer, directly connect with fixed block, do not use precise guide rail, therefore can not ensure that camera lens moves in the horizontal direction completely, increase error, reduce the computational accuracy of subsequent experimental etc.
Summary of the invention
The object of the present invention is to provide the many CCD of a kind of simple in structure, portable integrated form to gather reading camera, when real-time image acquisition, can accurately read and defocus step-length, to overcome the limitation of current existing procucts.
Technical scheme of the present invention is:
The many CCD of a kind of integrated form gather reading camera, comprise camera lens, the emitting light path of described camera lens is provided with the first light-dividing device, incident light is divided into respectively outgoing to two the second light-dividing devices of two bundles by described the first light-dividing device, and described the second light-dividing device is divided into two by incident light and restraints outgoing to two respectively and be fixed on the ccd image sensor on high precision translational platform.
The many CCD of described integrated form gather reading camera, between described camera lens and the first light-dividing device, be provided with the 3rd light-dividing device, incident light is divided into two bundles outgoing to the first light-dividing device and shading device respectively by described the 3rd light-dividing device, and the emitting light path of described shading device is provided with the ccd image sensor being fixed on high precision translational platform.
The many CCD of described integrated form gather reading camera, and described the first light-dividing device and the second light-dividing device all adopt Amici prism.
The many CCD of described integrated form gather reading camera, and described the 3rd light-dividing device adopts Amici prism, and described shading device adopts the shading pipe with C interface.
The many CCD of described integrated form gather reading camera, and the emergent light of described camera lens arrives the equivalent optical path of each ccd image sensor.
As shown from the above technical solution, the present invention utilizes light-dividing device imaging on multiple ccd image sensors simultaneously, multiple ccd image sensors are separately fixed on high precision translational platform, can drive the movement of corresponding ccd image sensor by the movement of high precision translational platform, when Real-time Collection multiple image, can accurately read and defocus step-length, the present invention is simple in structure, is easy to carry.
Brief description of the drawings
Fig. 1 is differential calculation schematic diagram;
Fig. 2 is the structural representation of the embodiment of the present invention 1;
Fig. 3 is the structural representation of the embodiment of the present invention 2.
Embodiment
Further illustrate the present invention with specific embodiment by reference to the accompanying drawings below.
Embodiment 1:
As shown in Figure 2, the many CCD of a kind of integrated form gather reading camera, comprise camera lens 10, the first Amici prism 21, two the second Amici prisms 22 and 23, four high precision translational platforms 31,32,33 and 34, four ccd image sensors 41,42,43 and 44.The first Amici prism 21, two the second Amici prisms 22 and 23 all adopt the Amici prism of 50R:50T.The first Amici prism 21 is arranged on the emitting light path of camera lens 10, and the second Amici prism 22 is arranged on the transmitted light path of the first Amici prism 21, and the second Amici prism 23 is arranged on the reflected light path of the first Amici prism 21.
Ccd image sensor 41 is arranged on the reflected light path of the second Amici prism 22, ccd image sensor 42 is arranged on the transmitted light path of the second Amici prism 22, ccd image sensor 43 is arranged on the reflected light path of the second Amici prism 23, and ccd image sensor 44 is arranged on the transmitted light path of the second Amici prism 23.Ccd image sensor 41 is fixed on high precision translational platform 31, and ccd image sensor 42 is fixed on high precision translational platform 32, and ccd image sensor 43 is fixed on high precision translational platform 33, and ccd image sensor 44 is fixed on high precision translational platform 34.
Embodiment 2:
As shown in Figure 3, compared with embodiment 1, the present embodiment has increased the 3rd Amici prism 20, shading device 50, high precision translational platform 30 and ccd image sensor 40, and other device and embodiment 1 are consistent.The 3rd Amici prism 20 adopts the Amici prism of 20R:80T.The 3rd Amici prism 20 is arranged on the emitting light path of camera lens 10, the first Amici prism 21 is arranged on the transmitted light path of the 3rd Amici prism 20, shading device 50 is arranged on the reflected light path of the 3rd Amici prism 20, ccd image sensor 40 is arranged on the emitting light path of shading device 50, and ccd image sensor 40 is fixed on high precision translational platform 30.
The all parts relating in embodiment 1 and embodiment 2 is described below:
Camera lens 10, for optically focused and focusing, thereby obtain required defocusing and focusedimage by the focal length that regulates camera lens 10.The present invention is not restricted the focal length of camera lens 10, and for example, the most frequently used is three times of zoom lens, and focal length is by 35mm to 105mm.
The first Amici prism 21, the second Amici prism 22 and 23, the 3rd Amici prism 20, for light splitting.The selection of different prisms and configuration are that the light distribution in order to ensure to enter into each ccd image sensor is roughly equal, and the shape of prism can freely be selected, as long as rationally distributed.
Ccd image sensor 40,41,42,43 and 44, for photosensitive imaging.In general, the size of CCD is larger, and photosensitive area is larger, and imaging effect is better, but size causes more greatly video camera volume larger, is unfavorable for carrying, and therefore, in actual applications, need to consider both impacts.The present invention does not have special requirement to the pixel of ccd image sensor 40,41,42,43 and 44, and the CCD that for example chooses 1024*768 pixel can reach the requirement of general experiment, if high especially to required precision, can choose more high-resolution CCD yet.
High precision translational platform 30,31,32,33 and 34, for moving horizontally and reading.Comprise manually and electronic two kinds, the former needs user's hand adjustment, and the latter can control automatically.The translation stage that experiment is chosen has two degrees of freedom of XY axle, can directly show mobile distance.Because CCD is fixed on translation stage, therefore, moving horizontally of translation stage driven moving horizontally of CCD simultaneously.Moving range and the precision of the present invention to translation stage itself do not have special requirement, and for example, moving range can be chosen 0～25mm, and precision can be 0.01mm.
Shading device 50, for optically focused.In embodiment 2, ccd image sensor 40 need be placed on shown in Fig. 3 on position, to ensure that light enters the equivalent optical path of five ccd image sensors 40,41,42,43 and 44.Distant due to ccd image sensor 40 and the 3rd Amici prism 20, therefore between them, increased shading device 50 (as shading pipe, standard C interface, can directly be connected on ccd image sensor 40), light can be aggregated into and be mapped in ccd image sensor 40, reduce the loss of light in communication process.
The operation principle of embodiment 1:
First, regulate the focal length of camera lens 10, regulate the position of high precision translational platform 32 simultaneously, make to become focusedimage on ccd image sensor 42, write down the distance z that focusedimage that now ccd image sensor 42 collects and high precision translational platform 32 move
0; Then, according to requirement of experiment determine need defocus step delta z, the position of high precision translational platform 31 and 32 is adjusted to respectively to z
0-Δ z and z
0-2 Δ z places, are adjusted to respectively z by the position of high precision translational platform 33 and 34
0+ Δ z and z
0+ 2 Δ z places, make to become out-of-focus image at ccd image sensor 41,42,43 with on 44; Finally, utilize ccd image sensor 41,42,43 and 44 Real-time Collection 4 width out-of-focus images.The all intensity images that collect and mobile parameter Δ z can directly show on the film viewing screen of video camera.
The operation principle of embodiment 2:
First, regulate the focal length of camera lens 10, regulate the position of high precision translational platform 32 simultaneously, make to become focusedimage on ccd image sensor 42, write down the distance z that now high precision translational platform 32 moves
0; Then, according to requirement of experiment determine need defocus step delta z, the position of high precision translational platform 30 and 31 is adjusted to respectively to z
0-Δ z and z
0-2 Δ z places, are adjusted to respectively z by the position of high precision translational platform 33 and 34
0+ Δ z and z
0+ 2 Δ z places, make to become out-of-focus image at ccd image sensor 40,41,43 with on 44; Finally, utilize this 5 width intensity image of ccd image sensor 40,41,42,43 and 44 Real-time Collections (1 width focusedimage and 4 width out-of-focus images).These intensity images and mobile parameter Δ z can directly show on the film viewing screen of video camera.
From the above, embodiment 1, compared with embodiment 2, although cannot obtain 5 width intensity images simultaneously, has reduced a ccd image sensor 40, the 3rd Amici prism 20 and a shading device 50, reduce cost, and overall structure compact and reasonable more; Embodiment 2 is compared with embodiment 1, and volume is larger, and cost is higher, and overall structure is compact not, but can gather 5 width intensity images simultaneously, can ensure the real-time that experimental data gathers.User can require to choose different schemes according to specific experiment.If require in experiment to gather and exceed 5 width intensity images simultaneously, the number that can expand optical element on the basis of embodiment 2, global design thought is constant.
The above execution mode is only that the preferred embodiment of the present invention is described; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that those of ordinary skill in the art make technical scheme of the present invention, all should fall in the definite protection range of claims of the present invention.
Claims (5)
1. the many CCD of integrated form gather reading camera, comprise camera lens, it is characterized in that: the emitting light path of described camera lens is provided with the first light-dividing device, incident light is divided into respectively outgoing to two the second light-dividing devices of two bundles by described the first light-dividing device, and described the second light-dividing device is divided into two by incident light and restraints outgoing to two respectively and be fixed on the ccd image sensor on high precision translational platform.
2. the many CCD of integrated form according to claim 1 gather reading camera, it is characterized in that: between described camera lens and the first light-dividing device, be provided with the 3rd light-dividing device, incident light is divided into two bundles outgoing to the first light-dividing device and shading device respectively by described the 3rd light-dividing device, and the emitting light path of described shading device is provided with the ccd image sensor being fixed on high precision translational platform.
3. the many CCD of integrated form according to claim 1 gather reading camera, it is characterized in that: described the first light-dividing device and the second light-dividing device all adopt Amici prism.
4. the many CCD of integrated form according to claim 2 gather reading camera, it is characterized in that: described the 3rd light-dividing device adopts Amici prism, and described shading device adopts the shading pipe with C interface.
5. the many CCD of integrated form according to claim 1 and 2 gather reading camera, it is characterized in that: the emergent light of described camera lens arrives the equivalent optical path of each ccd image sensor.
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| CN105136315A (en) * | 2015-08-18 | 2015-12-09 | 佛山市南海区欧谱曼迪科技有限责任公司 | Real-time quantification phase retrieval apparatus |
| CN105222901A (en) * | 2015-09-24 | 2016-01-06 | 程灏波 | Based on the real-time quantitative phase detection device of light intensity transmission equation |
| CN107347122A (en) * | 2016-05-05 | 2017-11-14 | 鹤立精工股份有限公司 | Wide area high-resolution lines scan method and its module |
| CN107861242A (en) * | 2017-12-20 | 2018-03-30 | 嘉兴中润光学科技有限公司 | Imaging system with multisensor |
| CN112540527A (en) * | 2020-12-07 | 2021-03-23 | 江苏科技大学 | Rapid convergence laminated imaging device for synchronously acquiring double-defocusing diffraction patterns |
| US11698526B2 (en) * | 2019-02-08 | 2023-07-11 | The Charles Stark Draper Laboratory, Inc. | Multi-channel optical system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136315A (en) * | 2015-08-18 | 2015-12-09 | 佛山市南海区欧谱曼迪科技有限责任公司 | Real-time quantification phase retrieval apparatus |
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| CN107347122A (en) * | 2016-05-05 | 2017-11-14 | 鹤立精工股份有限公司 | Wide area high-resolution lines scan method and its module |
| CN107347122B (en) * | 2016-05-05 | 2019-08-16 | 鹤立精工股份有限公司 | Wide area high-resolution lines scan method and its module |
| CN107861242A (en) * | 2017-12-20 | 2018-03-30 | 嘉兴中润光学科技有限公司 | Imaging system with multisensor |
| CN107861242B (en) * | 2017-12-20 | 2019-07-05 | 嘉兴中润光学科技有限公司 | Imaging system with multisensor |
| US11698526B2 (en) * | 2019-02-08 | 2023-07-11 | The Charles Stark Draper Laboratory, Inc. | Multi-channel optical system |
| CN112540527A (en) * | 2020-12-07 | 2021-03-23 | 江苏科技大学 | Rapid convergence laminated imaging device for synchronously acquiring double-defocusing diffraction patterns |
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