CN202793598U - Micro-displacement platform - Google Patents
Micro-displacement platform Download PDFInfo
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- CN202793598U CN202793598U CN 201220386072 CN201220386072U CN202793598U CN 202793598 U CN202793598 U CN 202793598U CN 201220386072 CN201220386072 CN 201220386072 CN 201220386072 U CN201220386072 U CN 201220386072U CN 202793598 U CN202793598 U CN 202793598U
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Abstract
The utility model discloses a micro-displacement platform, comprising an optical wedge, a servo motor, and a transmission mechanism, wherein the optical wedge is arranged inside the transmission mechanism; the transmission mechanism is meshed, through a gear, with a gear arranged on the servo motor; the servo motor drives the transmission mechanism to drive the optical wedge to rotate around an optical axis; a target on a detector also synchronously rotates; four undersampled sub-images are extracted at four moments; and the four sub-images are images which are orderly differed at a half-pixel interval. By adopting the micro-displacement platform, rotation and non-rotation of the optical wedge can be selectively used according to the condition; installation error of an optoelectronic system can be compensated for by adjusting the position of the optical wedge after an optical wedge rotating device is added; meanwhile, processing and assembling tolerances of the optical wedge are completely in the range of the machining precision of a common optical lens; the cost is low; and the space among the sub-images can be changed by adjusting the axial position of the optical wedge, so as to achieve sub-pixel movement required by pixel sizes of different detectors. Therefore, the versatility of the optical wedge device is improved.
Description
Technical field
The utility model relates to a kind of Micro-displacement Technique and comprises the device of this technology, and particularly a kind of micro-displacement platform is applicable to inferior picture dot imaging field.
Background technology
The unit size that is listed in widespread use in the electro-optical system and infrared detector array along with detector array is larger, and the resolution that so how to improve the IR staring imaging system just becomes primary task.At present, the method for raising IR staring imaging systemic resolution mainly contains four classes.The first kind is pure hardware method, is exactly the manufacture craft of directly improving probe unit, reduces probe unit photosensitive unit size, increases the probe unit pixel count, improves the utilization rate of photosurface.But reduce the size of photosensitive unit, increase pixel count, be subject to the restriction of technological level, and pixel reduces to bring the reduction of sensitivity and reducing of signal to noise ratio (S/N ratio).The Equations of The Second Kind method adopts the polylith detector to carry out the geometry splicing, to improve the total pixel number of probe unit.The 3rd class is Software-only method, namely under the limited prerequisite of image raw information, uses the software interpolation algorithm, increases the pixel count of output image, still, because its raw information amount does not increase, says on the stricti jurise to be difficult to improve resolving power.The 4th class methods namely are the micro scanning methods, and it is in the situation that does not increase the probe unit pixel count, the common method of energy Effective Raise resolution.
In order to realize mechanical micro scanning function, the micrometric displacement that needs certain moving component to come steers image to list at detector array.To micro scanning device main performance requirements be image from a position to the needed time of another position movement short as far as possible and bearing accuracy want height.Many possible solutions have been proposed in recent years, such as mobile infrared focal plane array itself; Place the pendulum mirror of imaging optical path by inclination; By prism in the light path between change of distance; Move by the condenser lens in the imaging optical path; Rotation by 1 block of optical flat in the imaging optical path realizes; Realize by 4 flat boards that are fixed on the big disk.
These micro scanning implementation Main Problems have: perhaps need larger structural member to support, perhaps need accurate micro scanning displacement platform, perhaps can't adjust in real time, perhaps versatility is relatively poor.
Summary of the invention
The purpose of this utility model is to propose a kind of microbit platform.The principle that the utility model utilizes wedge to change propagation path applies it in the micro scanning field.Wedge is arranged in the imaging optical path as the micro scanning device, around the optical axis High Rotation Speed, realizes the Displacement of image by this micro scanner of motor-driven.Do not need that large transformation just can realize micro scanning to former imaging system, overcome conventional micro scanner installation accuracy and require the problems such as high, that volume is large, weight is large, introduce extra aberration, versatility is poor.
The concrete technical scheme that the realization the purpose of this utility model adopts is as follows:
A kind of micro-displacement platform is comprised of wedge, servomotor, gear train, it is characterized in that: wedge is installed in the gear train, gear train by gear with the servomotor engagement that cogs is installed.
Wedge is the core of whole micro-displacement platform, and it makes the small displacement in BEAM SQUINT origin-location, realizes the sampling to the image sub-pix.The effect of servomotor mainly is to drive wedge, make its as requested rotating speed at the uniform velocity rotate.Gear train mainly is to realize the transmission of mechanical energy from motor driving shaft to the wedge driving shaft.The driven by servomotor gear train, drive wedge when optical axis rotates, picture point moves in a circle in image planes, the circular path circle as shown in Figure 2 of target picture point motion, in the circle of Fig. 2, foursquare 4 summits of the inscribe of this circle are put and sample, obtain 4 width of cloth micro scanning images, the P among Fig. 2 represents half-pixel.Namely obtain 4 required width of cloth subimages of inferior picture dot imaging.
As further improvement of the utility model, the position of sound production of described wedge is in imaging optical path.
A kind of micro-displacement platform of realizing that inferior pixel moves, picture point moves in a circle in image planes, and sample in 4 stain positions in Fig. 2 respectively, obtains four width of cloth micro scanning subimages.P represents half-pixel among the figure.Namely obtain 4 required width of cloth subimages of inferior picture dot imaging.
The method that micro-displacement platform realize target image sub-pix moves comprises the steps:
(1) driven by servomotor gear train drive wedge rotates around optical axis, and the target picture point moves in a circle in image planes;
(2) circular path that moves in the target picture point is respectively got foursquare 4 summits of inscribe of this circle and is sampled, and obtaining 4 width of cloth micro scanning images is 4 required width of cloth subimages of inferior picture dot imaging;
(3) 4 width of cloth subimages are obtained the image of high resolution by the Super-resolution Reconstruction algorithm.
Principle of device of the present utility model is simple, need not carry out large change to former electro-optical system, volume is small and exquisite, weight is light, easy for installation, do not affect original system and resemble matter, and wedge rotation and do not rotate can be according to the condition choice for use, after adding the rotating wedge device, the electro-optical system alignment error can compensate by regulating the wedge position, simultaneously wedge processing and build-up tolerance are fully in ordinary optical machining eyeglass accuracy rating, with low cost, the spacing that adjusting wedge axial location can change subimage moves with the sub-pix of realizing different detector picture dot dimensional requirements, has improved the versatility of optical wedge element.
Description of drawings
Fig. 1 is wedge polarisation schematic diagram of the present utility model.
Fig. 2 is wedge polarisation figure of the present utility model.
Fig. 3 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Such as Fig. 3, the utility model is comprised of wedge 1, servomotor 2, gear train 3, and wedge 1 is installed in the gear train 3, gear train 3 by gear with servomotor 2 engagement that cogs is installed.The position of sound production of wedge 1 preferably is placed in after the belongings mirror assembly before the detector in imaging optical path.Wedge 1, servomotor 2, gear train 3 all can be bought from market and obtain.
Wedge polarisation principle as shown in Figure 1, the wedge polarisation is shown in Fig. 2.Servomotor 2 drive transmission devices 3 wherein, drive wedge 1 when optical axis rotates, picture point moves in a circle in image planes, the circular path circle as shown in Figure 2 of target picture point motion, in the circle of Fig. 2, foursquare 4 summits of the inscribe of this circle are put and sample, obtain 4 width of cloth micro scanning images, the P among Fig. 2 represents half-pixel.Namely obtain 4 required width of cloth subimages of inferior picture dot imaging.
Realize comprising the steps: the method for inferior picture dot imaging by micro-displacement platform
(1) driven by servomotor gear train drive wedge rotates around optical axis, and the target picture point moves in a circle in image planes;
(2) sample in 4 stain positions in Fig. 2, obtains 4 width of cloth micro scanning images, and P represents half-pixel among the figure.Namely obtain 4 required width of cloth subimages of inferior picture dot imaging;
(3) 4 width of cloth subimages are obtained the image of high resolution by the Super-resolution Reconstruction algorithm.
After adopting micro-displacement platform, can access inferior picture dot image Super-resolution Reconstruction required owe the subgraph of sampling.By the Super-resolution Reconstruction algorithm original electro-optical system spatial resolving power is doubled, can realize not increasing the optical system focal length, not reduce to improve under the detector picture dot size prerequisite electro-optical system resolution characteristic.Method and apparatus principle of the present utility model is simple, need not carry out large change to former electro-optical system, volume is small and exquisite, weight is light, easy for installation, do not affect original system and resemble matter, and wedge rotation and do not rotate can be according to the condition choice for use, after adding the rotating wedge device, the electro-optical system alignment error can compensate by regulating the wedge position, simultaneously wedge processing and build-up tolerance are fully in ordinary optical machining eyeglass accuracy rating, with low cost, the spacing that adjusting wedge axial location can change subimage moves with the sub-pix of realizing different detector picture dot dimensional requirements, has improved the versatility of optical wedge element.
Claims (2)
1. a micro-displacement platform is comprised of wedge, servomotor, gear train, it is characterized in that: wedge is installed in the gear train, gear train by gear with the servomotor engagement that cogs is installed.
2. micro-displacement platform according to claim 1, it is characterized in that: the position of sound production of described wedge is in imaging optical path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220386072 CN202793598U (en) | 2012-08-06 | 2012-08-06 | Micro-displacement platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220386072 CN202793598U (en) | 2012-08-06 | 2012-08-06 | Micro-displacement platform |
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| Publication Number | Publication Date |
|---|---|
| CN202793598U true CN202793598U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220386072 Expired - Lifetime CN202793598U (en) | 2012-08-06 | 2012-08-06 | Micro-displacement platform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113867116A (en) * | 2021-10-19 | 2021-12-31 | 合肥工业大学 | Sub-pixel displacement imaging method for lensless microscopy |
-
2012
- 2012-08-06 CN CN 201220386072 patent/CN202793598U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113867116A (en) * | 2021-10-19 | 2021-12-31 | 合肥工业大学 | Sub-pixel displacement imaging method for lensless microscopy |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |