CN1865889A - Method for detecting verticality of optical axis and mounting baseplane in optical system - Google Patents
Method for detecting verticality of optical axis and mounting baseplane in optical system Download PDFInfo
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- CN1865889A CN1865889A CN 200510016792 CN200510016792A CN1865889A CN 1865889 A CN1865889 A CN 1865889A CN 200510016792 CN200510016792 CN 200510016792 CN 200510016792 A CN200510016792 A CN 200510016792A CN 1865889 A CN1865889 A CN 1865889A
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Abstract
The disclosed detection method for optical axis and its assembly base comprises: putting the target optical system on precise rotary table, hanging collimator above the system to parallel with the table axis; arranging an autocollimator above the plane reflector of rotary table for self-imaging with the reflector to record its azimuth angle; adjusting the image of cross line overlay with the one of collimator, reading the azimuth angle, and calculating the error of non-normality degree. This invention has wide application.
Description
Technical field
The invention belongs to optical instrument detection technique field, relate to the detection method of a kind of system optical axis and its installation base surface verticality.
Background technology
Along with the development of Aeronautics and Astronautics cause, the requirement of optical axis to the installation base surface verticality proposed many optical systems (scouting optical system etc. as unmanned plane).For guaranteeing that optical system in use keeps stable, often do not add adjusting mechanism during design, but make the verticality of the two reach requirement, and have the performance of shake-proof corrosioning impact by machining and the means of debuging, guarantee in use not change.This index should be carried out narrow examination before use, guarantees that it reaches designing requirement.The optical axis of optical system is the measurement index that optical system is unified Xiang Xin to the installation base surface verticality, do not find at present about this index can be for reference and the measuring method used for reference.
Summary of the invention
The object of the invention provides the detection method of a kind of system optical axis and its installation base surface verticality.
Performing step of the present invention is as follows:
(a) place precise rotating platform 2 on leveling platform 3, tested optical system 1 is placed on the precise rotating platform 2;
(b) directly over precise rotating platform 2, set up a parallel light tube 4, place the crosshair graticule on the focal plane of parallel light tube 4, the alignment lens parallel light tube 4 of tested optical system 1, crosshair on parallel light tube 4 focal planes is presented on the monitor through tested optical system 1 imaging, and electric crosshair image is presented at the monitor center simultaneously;
(c) rotate precise rotating platform 2, on monitor, observe the variation of picture with the relative position of the picture of parallel light tube 4 crosshairs of electric crosshair, between these two pictures, relative displacement is arranged, then the optical axis of the axis of rotation of precise rotating platform 2 and parallel light tube 4 is not parallel, adjusting leveling platform 3 makes the axis of rotation of precise rotating platform 2 parallel with the optical axis of parallel light tube 4, the picture that rotates precise rotating platform 2 electric crosshairs this moment does not have relative displacement with the picture of parallel light tube 4 crosshairs, and this moment, the bias of two crosshair pictures was brought by tested optical system 1 optical axis and installation base surface non-perpendicularity;
(d) plane mirror 6 is placed on the precise rotating platform 2, set up autocollimator 5 directly over the plane mirror 6, make autocollimator 5 and plane mirror 6 autocollimatic imagings, the angle of record autocollimator 5, i.e. the angle α of plane mirror 6 normals and autocollimator optical axis;
(e) adjust leveling platform 3, make the optical axis of tested optical system 1 and the optical axis coincidence of parallel light tube 4, the picture of observing electric crosshair on monitor overlaps with the picture of parallel light tube 4 crosshairs, plane mirror 6 is adjusted with tested optical system 1, changed former normal direction, read the angle of autocollimator 5, promptly this moment plane mirror 6 normals and autocollimator optical axis angle β;
(f) calculate tested optical system 1 optical axis and installation base surface non-perpendicularity error delta=β-α.
The characteristics of measuring method of the present invention:
The present invention is placed on tested optical system on the precise rotating platform, make the check of tested system optical axis and its installation base surface verticality be converted to the check of optical axis and precise rotating platform upper surface verticality, thereby, be converted to these two separable, measurable amounts of upper surface of the optical axis and the precise rotating platform of optical system with system optical axis and two not easily separated, as to be difficult for measurement amounts of its installation base surface.
The present invention can be widely used in space flight, aviation system optical axis in the check of its installation base surface verticality.
Description of drawings
Fig. 1 is the embodiment of the present invention synoptic diagram, also is the specification digest accompanying drawing.1 is tested optical system, 3 leveling platforms, 2 precise rotating platforms, 4 parallel light tubes, 5 autocollimators, 6 plane mirrors among the figure.
Embodiment
The device that realization the present invention measures system optical axis and its installation base surface verticality comprises leveling platform 3, precise rotating platform 2, parallel light tube 4, autocollimator 5, plane mirror 6.
CCD receiver signal output part with tested optical system 1 before measuring is connected with monitor, electric crosshair generator is connected with monitor to do auxiliary the observation simultaneously.
Measure a concrete optical system, the method implementation step of scouting system optical axis and its installation base surface verticality as unmanned plane is as follows:
(a) place precise rotating platform 2 on leveling platform 3, tested optical system 1 is placed on the precise rotating platform 2; The axis of rotation of precise rotating platform 2 should be vertical mutually with precise rotating platform 2 surfaces, both verticality depend on the requirement of tested optical system 1 optical axis and installation base surface verticality, the verticality on the axis of rotation of precise rotating platform 2 and precise rotating platform 2 surfaces should be better than 1/5 of tested optical system 1 optical axis and installation base surface verticality, requiring for verticality is 100 " tested optical system 1, the verticality on the axis of rotation of precise rotating platform 2 and precise rotating platform 2 surfaces is better than 20 "; Leveling platform 3 adopts the mode of 3 leveling, and higher sensitivity is arranged, and makes the revolving shaft of precise rotating platform 2 parallel with the optical axis of parallel light tube 4 by the adjustment of exchanging platform 3;
(b) set up a parallel light tube 4 directly over precise rotating platform 2, the effect of parallel light tube 4 provides an infinite distance target, and its focal length should be 2～3 times of focal length of tested optical system 1; Place the crosshair graticule on the focal plane of parallel light tube 4, the alignment lens parallel light tube 4 of tested optical system 1, crosshair on parallel light tube 4 focal planes is presented on the monitor through the image that tested optical system 1 forms, and electric crosshair image is presented at the monitor center simultaneously;
(c) rotate precise rotating platform 2, on monitor, observe the variation of picture with the relative position of the picture of parallel light tube 4 crosshairs of electric crosshair, between these two pictures, relative displacement is arranged, then the optical axis of the axis of rotation of precise rotating platform 2 and parallel light tube 4 is not parallel, adjusting leveling platform 3 makes the axis of rotation of precise rotating platform 2 parallel with the optical axis of parallel light tube 4, the picture of electric crosshair does not have relative displacement with the picture of parallel light tube 4 crosshairs at this moment, and this moment, the bias of two crosshair pictures was brought by optical axis and installation base surface non-perpendicularity;
(d) plane mirror 6 is placed on the precise rotating platform 2, the face shape of plane mirror 6 is better than 1 λ, sets up autocollimator 5 directly over the plane mirror 6, makes autocollimator 5 and plane mirror 6 autocollimatic imagings, and autocollimator 5 is selected 0.2 " autocollimator for use; The angle of record autocollimator 5, i.e. the angle α of plane mirror 6 normals and autocollimator optical axis;
(e) adjust leveling platform 3, make the optical axis of tested optical system 1 and the optical axis coincidence of parallel light tube 4, the picture of observing electric crosshair on monitor overlaps with the picture of parallel light tube 4 crosshairs, plane mirror 6 is adjusted with tested optical system 1, changed former normal direction, read the angle of autocollimator 5, promptly this moment plane mirror 6 normals and autocollimator optical axis angle β;
(f) calculate tested optical system 1 optical axis and installation base surface non-perpendicularity error delta=β-α.
According to tested optical system 1 optical axis that calculates and installation base surface non-perpendicularity error delta, can and debug means by machining and make it reach designing requirement.
Claims (1)
1. the detection method of a system optical axis and its installation base surface verticality is characterized in that adopting the following step:
(a) go up placement precise rotating platform (2) at leveling platform (3), tested optical system (1) is placed on the precise rotating platform (2);
(b) directly over precise rotating platform (2), set up a parallel light tube (4), place the crosshair graticule on the focal plane of parallel light tube (4), the alignment lens parallel light tube (4) of tested optical system (1), crosshair on parallel light tube (4) focal plane is presented on the monitor through the image that tested optical system (1) forms, and electric crosshair image is presented at the monitor center simultaneously;
(c) rotate precise rotating platform (2), on monitor, observe the variation of picture with the relative position of the picture of parallel light tube (4) crosshair of electric crosshair, between these two pictures, relative displacement is arranged, then the optical axis of the axis of rotation of precise rotating platform (2) and parallel light tube (4) is not parallel, adjust leveling platform (3) and make the axis of rotation of precise rotating platform (2) parallel with the optical axis of parallel light tube (4), the picture of electric crosshair does not have relative displacement with the picture of parallel light tube (4) crosshair at this moment;
(d) plane mirror (6) is placed on the precise rotating platform (2), set up autocollimator (5) directly over the plane mirror (6), make autocollimator (5) and plane mirror (6) autocollimatic imaging, the orientation angles of record autocollimator (5), i.e. the angle α of plane mirror (6) normal and autocollimator (5) optical axis;
(e) adjust leveling platform (3), make the optical axis of tested optical system (1) and the optical axis coincidence of parallel light tube (4), the picture of observing electric crosshair on monitor overlaps with the picture of parallel light tube (4) crosshair, read the orientation angles of autocollimator (5), i.e. the normal of plane mirror this moment (6) and the angle β of autocollimator (5) optical axis;
(f) calculate tested optical system 1 optical axis and installation base surface non-perpendicularity error delta=β-α.
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