CN204479039U - Based on the light path system of high precision optical grating projection device - Google Patents
Based on the light path system of high precision optical grating projection device Download PDFInfo
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- CN204479039U CN204479039U CN201520117957.4U CN201520117957U CN204479039U CN 204479039 U CN204479039 U CN 204479039U CN 201520117957 U CN201520117957 U CN 201520117957U CN 204479039 U CN204479039 U CN 204479039U
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Abstract
The utility model relates to a kind of light path system based on high precision optical grating projection device, comprise green LED light source and red LED light source that the horizontal blue led light source of central optical axis and central optical axis are vertical shape, the light of described blue led light source is horizontal collimation lens set, first light splitting piece and second light splitting piece of transmission on front side of it successively; The first vertical collimation lens set of the Transmission light of described green LED light source above it, and coincide with blue led light source through the first light splitting piece reflection; The second vertical collimation lens set of the Transmission light of described red LED light source above it, and coincide with blue and green LED light source through the second light splitting piece reflection; Be inducted into through the optical path switching device be positioned on front side of the second light splitting piece the dmd chip being positioned at front side top after the light coincidence of described blue led light source, green LED light source and red LED light source, the light that described dmd chip exports is output into picture through projection lens by rear.This light path system structure is simple, and clearly can present the superficial makings of measured workpiece, profile is well arranged.
Description
Technical field
The utility model relates to a kind of light path system based on high precision optical grating projection device.
Background technology
Non-contact 3-D measuring method is mainly based on sound, optical, electrical magnetic etc., and along with the fast development of digital projection technique and theory on computer vision, optical three-dimensional measurement has become the main stream approach in non-contact measurement field.Grating project is a kind of structural light three-dimensional measuring technique, by optical grating projection in testee surface, deformed grating image is obtained by CCD camera, the deforming stripe collected is carried out image procossing by computing machine, calculate the volume coordinate of body surface sampling spot, reconstruct the three-dimensional information of body surface; In three-dimensional measurement field, high-quality grating fringe is in position of equal importance with the shadow casting technique projected away by striped, and high-quality grating fringe just can must obtain based on high-precision light path system, and existing light path system precision is all general lower, need a kind of high-precision light path system for this reason.
Summary of the invention
The purpose of this utility model is to provide a kind of light path system based on high precision optical grating projection device, and this light path system structure is simple, and clearly can present the superficial makings of measured workpiece, profile is well arranged.
The technical solution of the utility model is: a kind of light path system based on high precision optical grating projection device, comprise green LED light source and red LED light source that the horizontal blue led light source of central optical axis and central optical axis are vertical shape, the light of described blue led light source is horizontal collimation lens set, first light splitting piece and second light splitting piece of transmission on front side of it successively; The first vertical collimation lens set of the Transmission light of described green LED light source above it, and coincide with blue led light source through the first light splitting piece reflection; The second vertical collimation lens set of the Transmission light of described red LED light source above it, and coincide with blue and green LED light source through the second light splitting piece reflection; Be inducted into through the optical path switching device be positioned on front side of the second light splitting piece the dmd chip being positioned at front side top after the light coincidence of described blue led light source, green LED light source and red LED light source, the light that described dmd chip exports is output into picture through projection lens by rear.
Further, the central optical axis of described blue led light source and horizontal collimation lens set and optical path switching device coincides, and the angle of the central optical axis of described first light splitting piece and the second light splitting piece and blue led light source is 45 °.
Further, the central optical axis of the central optical axis of described green LED light source and the first vertical collimation lens set coincides, and the central optical axis of the central optical axis of described red LED light source and the second vertical collimation lens set coincides.
Further, described optical path switching device comprise set gradually along light path microlens array, be positioned at tilting reflective mirror on front side of microlens array, be positioned at convergent lens above reflective mirror and prism successively, the angle of the central optical axis of described reflective mirror and microlens array is 35 ° ~ 55 °.
Further, described projection lens comprises the first lens, the second lens, the 3rd lens and the 4th lens that set gradually along light path.
Further, described projection lens is the ultralow distortion near field telecentric lens, the ultralow distortion telecentric lens of midfield ultralow distortion telecentric lens or far field, the focusing range of the ultralow distortion telecentric lens in described near field is 500 ~ 300 ~ 200mm, the focusing range of the ultralow distortion telecentric lens in described midfield is 2500 ~ 1500 ~ 500mm, and the focusing range of the ultralow distortion telecentric lens in described far field is 5000 ~ 600 ~ 200mm.
Compared with prior art, the utility model has the following advantages: this light path system structure is simple, and clearly can present the superficial makings of measured workpiece, profile is well arranged, accurately inerrably amplifies 20 ~ 125 times and makes precision measurement measured workpiece; This light path system can be used for near field, midfield and far field projection, effectively to save hardware cost, real new one-object-many-purposes simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure: the vertical collimation lens set 8-second of 1-blue led light source 2-green LED light source 3-red LED light source 4-horizontal collimation lens set 5-first light splitting piece 6-second light splitting piece 7-first is collimation lens set 9-optical path switching device 91-microlens array 92-reflective mirror 93-convergent lens 94-prism 10-DMD chip 11-projection lens 11a-first lens 11b-second lens 11c-the 3rd lens 11d-the 4th lens 12-angle 13-angle vertically.
Embodiment
For above-mentioned feature and advantage of the present utility model can be become apparent, special embodiment below, and coordinate accompanying drawing, be described in detail below, but the utility model is not limited to this.
With reference to figure 1
A kind of light path system based on high precision optical grating projection device, comprise green LED light source 2 and red LED light source 3 that the horizontal blue led light source 1 of the central optical axis that vertically arranges and horizontally disposed central optical axis are vertical shape, the light of described blue led light source successively transmission is positioned at horizontal collimation lens set 4, first light splitting piece 5 on front side of it and the second light splitting piece 6; The Transmission light of described green LED light source is arranged at the vertical collimation lens set 7 of horizontally disposed first above it, and through first light splitting piece reflection after and coincide with the blue led light source passing the first light splitting piece; The Transmission light of described red LED light source is arranged at the vertically collimation lens set 8 of second above it, and after the second light splitting piece reflection with pass the overlapping of the second light splitting piece after blueness and green LED light source coincide; Be inducted into through the optical path switching device 9 be positioned on front side of the second light splitting piece the dmd chip 10 being positioned at front side top after the light coincidence of described blue led light source, green LED light source and red LED light source, 0.45 cun of dmd chip that described dmd chip provides for TI company, brightness is greater than 260lm, and resolution is 720P.Described dmd chip is positioned at connect the rear light signal reverse transmission after the prismatic refraction in optical path switching device exported of conversion in the projection lens 11 at prism rear, and has projection lens to be rearward output into picture.
In the present embodiment, the central optical axis of described blue led light source and horizontal collimation lens set and optical path switching device coincides, so that directly transmission level collimation lens set, described first light splitting piece 5 and the second light splitting piece 6 are respectively 45 ° with the angle 12 of the central optical axis of blue led light source, so that the green LED light transmitted by the first vertical lens coincides with the blue LED light passing the first light splitting piece after the first light splitting piece refraction, be convenient to red LED light that the second vertical lens transmit simultaneously and pass the blue LED light of the second light splitting piece and green LED light coincides after the second light splitting piece refraction with after coinciding.
In the present embodiment, the central optical axis of the central optical axis of described green LED light source and the first vertical collimation lens set coincides, so that green LED light source transmission first is collimation lens set vertically, the central optical axis of the central optical axis of described red LED light source and the second vertical collimation lens set coincides, so that red LED light source transmission second vertically collimation lens set.
In the present embodiment, described optical path switching device comprise set gradually along light path microlens array 91, be positioned at tilting reflective mirror 92 on front side of microlens array, be positioned at convergent lens 93 above reflective mirror and prism 94 successively, the angle 13 of the central optical axis of described reflective mirror and microlens array is 35 ° ~ 55 °.
In the present embodiment, described projection lens comprises the first lens 11a, the second lens 11b, the 3rd lens 11c and the 4th lens 11d that set gradually along light path.
In the present embodiment, described projection lens is the ultralow distortion near field telecentric lens, the ultralow distortion telecentric lens of midfield ultralow distortion telecentric lens or far field, and the focusing range of the ultralow distortion telecentric lens in described near field is 500 ~ 300 ~ 200mm, and its distortion is less than 0.15%; The focusing range of the ultralow distortion telecentric lens in described midfield is 2500 ~ 1500 ~ 500mm, and its distortion is less than 0.45%; The focusing range of the ultralow distortion telecentric lens in described far field is 5000 ~ 600 ~ 200mm, and its distortion is less than 0.3%.
During described projection lens distance 300mm, one side can scan 400 × 300mm simultaneously
2area, measures the depth of field and is generally 30-50mm.Precision is up to 0.002mm.
The principle of work of this light path system: the needed number grating fringe produced by computing mechanism is inducted in dmd chip through optical path switching device, and digital raster signal is converted into grating by this dmd chip, then by projection lens by this optical grating projection on object.
The foregoing is only preferred embodiment of the present utility model, all equalizations done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (6)
1. the light path system based on high precision optical grating projection device, comprise green LED light source and red LED light source that the horizontal blue led light source of central optical axis and central optical axis are vertical shape, it is characterized in that, the light of described blue led light source is horizontal collimation lens set, first light splitting piece and second light splitting piece of transmission on front side of it successively; The first vertical collimation lens set of the Transmission light of described green LED light source above it, and coincide with blue led light source through the first light splitting piece reflection; The second vertical collimation lens set of the Transmission light of described red LED light source above it, and coincide with blue and green LED light source through the second light splitting piece reflection; Be inducted into through the optical path switching device be positioned on front side of the second light splitting piece the dmd chip being positioned at front side top after the light coincidence of described blue led light source, green LED light source and red LED light source, the light that described dmd chip exports is output into picture through projection lens by rear.
2. the light path system based on high precision optical grating projection device according to claim 1, it is characterized in that, the central optical axis of described blue led light source and horizontal collimation lens set and optical path switching device coincides, and the angle of the central optical axis of described first light splitting piece and the second light splitting piece and blue led light source is 45 °.
3. the light path system based on high precision optical grating projection device according to claim 1 and 2, it is characterized in that, the central optical axis of the central optical axis of described green LED light source and the first vertical collimation lens set coincides, and the central optical axis of the central optical axis of described red LED light source and the second vertical collimation lens set coincides.
4. the light path system based on high precision optical grating projection device according to claim 1, it is characterized in that, described optical path switching device comprise set gradually along light path microlens array, be positioned at tilting reflective mirror on front side of microlens array, be positioned at convergent lens above reflective mirror and prism successively, the angle of the central optical axis of described reflective mirror and microlens array is 35 ° ~ 55 °.
5. the light path system based on high precision optical grating projection device according to claim 1, is characterized in that, described projection lens comprises the first lens, the second lens, the 3rd lens and the 4th lens that set gradually along light path.
6. according to claim 1 or 5 based on the light path system of high precision optical grating projection device, it is characterized in that, described projection lens is the ultralow distortion near field telecentric lens, the ultralow distortion telecentric lens of midfield ultralow distortion telecentric lens or far field, the focusing range of the ultralow distortion telecentric lens in described near field is 500 ~ 300 ~ 200mm, the focusing range of the ultralow distortion telecentric lens in described midfield is 2500 ~ 1500 ~ 500mm, and the focusing range of the ultralow distortion telecentric lens in described far field is 5000 ~ 600 ~ 200mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068288A (en) * | 2019-05-28 | 2019-07-30 | 西南科技大学 | A kind of whole field projection of laser scanning composite coding striped and acquisition device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068288A (en) * | 2019-05-28 | 2019-07-30 | 西南科技大学 | A kind of whole field projection of laser scanning composite coding striped and acquisition device |
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Address after: 350108, Fujian Fuzhou high tech Zone Haixi new and high tech Industrial Park Innovation Park, No. 15, building 3-8 Patentee after: Fujian Hao Lan Photoelectric Co., Ltd. Address before: Cangshan District of Fuzhou City, Fujian province 350008 Jinshan Road No. 618 orangery Chau Industrial Park 13 3 floor Patentee before: Fujian Hao Lan Photoelectric Co., Ltd. |