CN104972148A - Cylindrical mirror optical axis determination system and method - Google Patents
Cylindrical mirror optical axis determination system and method Download PDFInfo
- Publication number
- CN104972148A CN104972148A CN201510354454.3A CN201510354454A CN104972148A CN 104972148 A CN104972148 A CN 104972148A CN 201510354454 A CN201510354454 A CN 201510354454A CN 104972148 A CN104972148 A CN 104972148A
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- cylindrical mirror
- collimation
- picture
- auto
- cylindrical
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B25/00—Accessories or auxiliary equipment for turning-machines
- B23B25/06—Measuring, gauging, or adjusting equipment on turning-machines for setting-on, feeding, controlling, or monitoring the cutting tools or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
- B23Q17/2414—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves for indicating desired positions guiding the positioning of tools or workpieces
- B23Q17/2419—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves for indicating desired positions guiding the positioning of tools or workpieces by projecting a single light beam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
- B23Q17/2428—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves for measuring existing positions of tools or workpieces
Abstract
The invention relates to a cylindrical mirror optical axis determination system and method. The system comprises a posture adjusting tool, a mirror frame, an optical centrescope, a CCD camera and a PC. The posture adjusting tool is arranged on a lathe rotary shaft. The mirror frame is fixed to one end of the posture adjusting tool. The optical centrescope is located in front of an emergence window of the mirror frame and connected with one end of the CCD camera. The other end of the CCD camera is connected with the PC. A cylindrical mirror is fixed in the mirror frame. The cylindrical face of the cylindrical mirror faces the optical centrescope, and a face B is opposite to the cylindrical face. The technical problems that in an existing method for determining cylindrical mirror optical axis bases, optical elements are prone to being scratched, and the optical axis bases are low in precision are solved. The optical non-contact measurement mode is completely adopted, a plane auto-collimation reflection image and a cylindrical face auto-collimation reflection image of the cylindrical mirror are found, and a film coating face of the cylindrical mirror cannot be scratched.
Description
Technical field
The invention belongs to optics dead axle field, be specifically related to the system and method for a kind of cylindrical mirror optics dead axle processing.
Background technology
Cylindrical mirror is an aspheric special case, has special optical imaging properties.High-precision cylindrical mirror and the application of cylindrical system in line focusing system, motion picture pickup camera lens, laser printer etc. are more and more extensive, and these application need corresponding high-precision means of debuging to ensure the light axis consistency of optical system.
The imaging characteristic of cylindrical mirror: because cylindrical lens is not rotational symmetric, so cylindrical mirror does not have centre of sphere point, only have centre of sphere line.Plane wave also can not form focus through cylindrical lens, and can form an intersection.There is not so-called optical axis in cylindrical mirror in theory, but be that multiple cylindrical mirror combinationally uses in actual applications, require that the plane of each cylindrical mirror is parallel to each other, its intersection is mutually orthogonal, each orthogonal points must point-blank and with the plane orthogonal of cylindrical mirror, all actual cylindrical mirrors debug the virtual optical axis using cylindrical mirror in process.
If cylindrical optical system can not meet as above debug requirement, then cylindrical system optical quality can be caused to decline and even can not use.So the determination of cylindrical mirror optical axis is cylindrical optical system debug in important technology difficult point urgently to be resolved hurrily.
Existing cylindrical mirror axis fixation method is, utilizes optical centering instrument to find the auto-collimation reflection image jerk value controlling this cylindrical mirror plane, and recycling amesdial controls the variable quantity of cylindrical mirror bus in horizontal and vertical direction, ensures the dead axle precision of cylindrical mirror.The shortcoming of this method is:
1, the method adopts amesdial contact type measurement, and operating process easily scratches cylindrical mirror coated surface;
When 2, repeatedly adjusting cylindrical mirror attitude, the reseting precision of contact type measurement cannot ensure, causes accumulated error;
3, determine its optical axis position with cylindrical mirror contour tolerance, plain shaft precision cannot ensure, namely cannot ensure optical accuracy with mechanical precision.
Summary of the invention
Existingly determining that the method for cylindrical mirror optical axis benchmark easily causes optical element to scratch and the low technical problem of optical axis reference precision to solve, the invention provides a kind of cylindrical mirror optics dead axle system and method.
Technical solution of the present invention is:
Cylindrical mirror optics dead axle system, its special character is: comprise pose adjustment frock, picture frame, optical centering instrument, CCD camera and PC;
Described pose adjustment frock is arranged on lathe gyroaxis, and described picture frame is fixed on one end of pose adjustment frock, and described optical centering instrument is positioned at the dead ahead of the exit window of picture frame, and is connected with one end of CCD camera; The other end of described CCD camera is connected with PC; Picture frame internal fixtion has cylindrical mirror, and the cylinder of cylindrical mirror, towards optical centering instrument, is B face with the opposite face of cylinder.
Cylindrical mirror optics axis fixation method, comprises the following steps:
1] the plane auto-collimation picture point of cylindrical mirror is found:
1.1] optical centering instrument is accommodated to the image of spherical center position in cylindrical mirror B face, become the picture point on optical centering instrument to be the plane auto-collimation reflection picture point of cylindrical mirror;
Determined the image of spherical center position in B face by following several mode according to the type of cylindrical mirror:
The position L of the B face image of spherical center of plano-convex cylindrical lens:
The position L of the B face image of spherical center of plano-concave cylindrical mirror:
R
bfor the radius of curvature in B face, R
afor the radius of curvature of cylinder, N is the Refractive Index of Material of cylindrical mirror, and d is the center thickness of cylindrical mirror;
1.2] the plane auto-collimation found reflection picture point is presented on PC by CCD camera; Adjustment gesture stability frock, and observe the plane auto-collimation reflection picture point on PC, until the movement locus of plane auto-collimation reflection picture point gradually becomes a stroke roundlet by drawing great circle;
2] the cylinder auto-collimation picture of cylindrical mirror is found:
2.1] optical centering instrument is accommodated to the cylindrical curvature midline position of cylindrical mirror, the picture point on optical centering instrument is become to be a cylinder auto-collimation picture (straight line) of cylindrical mirror, find cylindrical mirror cylinder auto-collimation picture by CCD camera at PC, and read the now cylindrical mirror position L1 of cylinder auto-collimation picture on optical centering instrument;
2.2] lathe gyroaxis is revolved turnback, optical centering instrument remains unchanged, the picture point on optical centering instrument is become to be the quadric cylinder auto-collimation picture of cylindrical mirror, find cylindrical mirror quadric cylinder auto-collimation picture by CCD camera at PC, and read the now position L2 of cylindrical mirror quadric cylinder auto-collimation picture on optical centering instrument;
2.3] the micro eyepiece crosshair of optical centering instrument is adjusted in position, (L1+L2)/2;
2.4] adjust pose adjustment frock, observed on PC by CCD camera, until cylindrical mirror cylinder auto-collimation picture and the center of quadric cylinder auto-collimation picture and the center superposition of micro eyepiece crosshair;
3] step 1 is performed], until the movement locus of the auto-collimation reflection picture point of cylindrical mirror gradually becomes stroke roundlet even close to transfixion by drawing great circle, the center superposition of the cylinder auto-collimation picture of cylindrical mirror and the crosshair of micro eyepiece, now the optical axis of cylindrical mirror overlaps with lathe gyroaxis.
The invention has the advantages that:
(1) the present invention adopts optical non-contact metering system completely, finds plane auto-collimation reflection image and the cylinder auto-collimation reflection image of cylindrical mirror, can not scratch cylindrical mirror coated surface.
(2) the present invention changes cylindrical mirror spatial attitude by pose adjustment frock, and control the jerk value of two pictures in optical centering instrument, ensure the registration accuracy of optical axis and mechanical rotating shaft, dead axle machining accuracy is high.
Accompanying drawing explanation
Fig. 1 is the system schematic of cylindrical mirror dead axle of the present invention;
Wherein Reference numeral is: 1-lathe gyroaxis, 2-pose adjustment frock, 3-picture frame, 4-cylindrical mirror, 5-optical centering instrument, 6-CCD camera, 7-PC machine, 8-lathe tool.
Detailed description of the invention
As shown in Figure 1, cylindrical mirror optics dead axle system of processing, comprises lathe gyroaxis 1, pose adjustment frock 2, picture frame 3, cylindrical mirror 4, lathe tool 8, optical centering instrument 5, CCD camera 6 and PC 7; Pose adjustment frock 2 is arranged on lathe gyroaxis 1, and picture frame 3 is arranged on one end of pose adjustment frock 2, and optical centering instrument 5 is positioned at the dead ahead of the exit window of picture frame 3, and is connected with one end of CCD camera 6; The other end of CCD camera 6 is connected with PC 7; Cylindrical mirror 4 is fixed in picture frame 3, and its cylinder partial is towards optical centering instrument 5; Be B face with the opposite face of cylinder, lathe tool 8 contacts with picture frame 3 outer.
Concrete steps:
1] the plane auto-collimation picture point of cylindrical mirror is found:
1.1] optical centering instrument is accommodated to the image of spherical center position in cylindrical mirror B face, become the picture point on optical centering instrument to be the plane auto-collimation reflection picture point of cylindrical mirror;
Determined the image of spherical center position in B face by following several mode according to the type of cylindrical mirror:
The position L of the B face image of spherical center of plano-convex cylindrical lens:
The position L of the B face image of spherical center of plano-concave cylindrical mirror:
R
bfor the radius of curvature in B face, R
afor the radius of curvature of cylinder, N is the Refractive Index of Material of cylindrical mirror, and d is the center thickness of cylindrical mirror;
1.2] the plane auto-collimation found reflection picture point is presented on PC by CCD camera; Adjustment gesture stability frock, and observe the plane auto-collimation reflection picture point on PC, until the movement locus of plane auto-collimation reflection picture point gradually becomes a stroke roundlet by drawing great circle;
2] the cylinder auto-collimation picture of cylindrical mirror is found:
2.1] optical centering instrument is accommodated to the cylindrical curvature midline position of cylindrical mirror, the picture point on optical centering instrument is become to be a cylinder auto-collimation picture (this picture is straight line) of cylindrical mirror, find cylindrical mirror cylinder auto-collimation picture by CCD camera at PC, and read the now cylindrical mirror position L1 of cylinder auto-collimation picture on optical centering instrument;
2.2] lathe gyroaxis is revolved turnback, optical centering instrument remains unchanged, the picture point on optical centering instrument is become to be the quadric cylinder auto-collimation picture of cylindrical mirror, find cylindrical mirror quadric cylinder auto-collimation picture by CCD camera at PC, and read the now position L2 of cylindrical mirror quadric cylinder auto-collimation picture on optical centering instrument;
2.3] the micro eyepiece crosshair of optical centering instrument is adjusted in position, (L1+L2)/2;
2.4] adjust pose adjustment frock, observed on PC by CCD camera, until cylindrical mirror cylinder auto-collimation picture and the center of quadric cylinder auto-collimation picture and the center superposition of micro eyepiece crosshair;
3] step 1 is performed], until the movement locus of the auto-collimation reflection picture point of cylindrical mirror gradually becomes stroke roundlet even close to transfixion by drawing great circle, the center superposition of the cylinder auto-collimation picture of cylindrical mirror and the crosshair of micro eyepiece, now the optical axis of cylindrical mirror overlaps with lathe gyroaxis.
4] now process cylindrical lens structure frame relative dimensions, ensure that structure cylindrical and cylindrical mirror light shaft coaxle degree are better than 0.007mm, ensure that structure end face and cylindrical mirror optical axis verticality are better than 0.01mm.
5] use lathe tool to process picture frame, ensure that cylindrical and cylindrical mirror light shaft coaxle degree are better than 0.007mm, ensure that structure end face and cylindrical mirror optical axis verticality are better than 0.01mm.
Claims (2)
1. cylindrical mirror optics dead axle system, is characterized in that: comprise pose adjustment frock, picture frame, optical centering instrument, CCD camera and PC;
Described pose adjustment frock is arranged on lathe gyroaxis, and described picture frame is fixed on one end of pose adjustment frock, and described optical centering instrument is positioned at the dead ahead of the exit window of picture frame, and is connected with one end of CCD camera; The other end of described CCD camera is connected with PC; Picture frame internal fixtion has cylindrical mirror, and the cylinder of cylindrical mirror, towards optical centering instrument, is B face with the opposite face of cylinder.
2., based on cylindrical mirror optics axis fixation method according to claim 1, it is characterized in that: comprise the following steps:
1] the plane auto-collimation picture point of cylindrical mirror is found:
1.1] optical centering instrument is accommodated to the image of spherical center position in cylindrical mirror B face, become the picture point on optical centering instrument to be the plane auto-collimation reflection picture point of cylindrical mirror;
Determined the image of spherical center position in B face by following several mode according to the type of cylindrical mirror:
The position L of the B face image of spherical center of plano-convex cylindrical lens:
The position L of the B face image of spherical center of plano-concave cylindrical mirror:
R
bfor the radius of curvature in B face, R
afor the radius of curvature of cylinder, N is the Refractive Index of Material of cylindrical mirror, and d is the center thickness of cylindrical mirror;
1.2] the plane auto-collimation found reflection picture point is presented on PC by CCD camera; Adjustment gesture stability frock, and observe the plane auto-collimation reflection picture point on PC, until the movement locus of plane auto-collimation reflection picture point gradually becomes a stroke roundlet by drawing great circle;
2] the cylinder auto-collimation picture of cylindrical mirror is found:
2.1] optical centering instrument is accommodated to the cylindrical curvature midline position of cylindrical mirror, the picture point on optical centering instrument is become to be a cylinder auto-collimation picture (straight line) of cylindrical mirror, find cylindrical mirror cylinder auto-collimation picture by CCD camera at PC, and read the now cylindrical mirror position L1 of cylinder auto-collimation picture on optical centering instrument;
2.2] lathe gyroaxis is revolved turnback, optical centering instrument remains unchanged, the picture point on optical centering instrument is become to be the quadric cylinder auto-collimation picture of cylindrical mirror, find cylindrical mirror quadric cylinder auto-collimation picture by CCD camera at PC, and read the now position L2 of cylindrical mirror quadric cylinder auto-collimation picture on optical centering instrument;
2.3] the micro eyepiece crosshair of optical centering instrument is adjusted in position, (L1+L2)/2;
2.4] adjust pose adjustment frock, observed on PC by CCD camera, until cylindrical mirror cylinder auto-collimation picture and the center of quadric cylinder auto-collimation picture and the center superposition of micro eyepiece crosshair;
3] step 1 is performed], until the movement locus of the auto-collimation reflection picture point of cylindrical mirror gradually becomes stroke roundlet even close to transfixion by drawing great circle, the center superposition of the cylinder auto-collimation picture of cylindrical mirror and the crosshair of micro eyepiece, now the optical axis of cylindrical mirror overlaps with lathe gyroaxis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510354454.3A CN104972148A (en) | 2015-06-24 | 2015-06-24 | Cylindrical mirror optical axis determination system and method |
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| CN201510354454.3A CN104972148A (en) | 2015-06-24 | 2015-06-24 | Cylindrical mirror optical axis determination system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537631A (en) * | 2015-12-21 | 2016-05-04 | 陈泽进 | Non-contact omni-axis photoelectric tool setting gauge for numerically-controlled machine tool |
| CN107883869A (en) * | 2017-10-24 | 2018-04-06 | 佛山杰致信息科技有限公司 | A kind of optical measuring device of high-precision shafting running accuracy |
| CN108942716A (en) * | 2018-06-13 | 2018-12-07 | 南京航空航天大学 | A kind of aperture knife tool for fibre reinforced composites |
-
2015
- 2015-06-24 CN CN201510354454.3A patent/CN104972148A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537631A (en) * | 2015-12-21 | 2016-05-04 | 陈泽进 | Non-contact omni-axis photoelectric tool setting gauge for numerically-controlled machine tool |
| CN107883869A (en) * | 2017-10-24 | 2018-04-06 | 佛山杰致信息科技有限公司 | A kind of optical measuring device of high-precision shafting running accuracy |
| CN108942716A (en) * | 2018-06-13 | 2018-12-07 | 南京航空航天大学 | A kind of aperture knife tool for fibre reinforced composites |
| CN108942716B (en) * | 2018-06-13 | 2020-08-07 | 南京航空航天大学 | Hole machining tool for fiber reinforced composite material |
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Application publication date: 20151014 |
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