CN104483741A - Method for accurately setting optical axis of wedge lens - Google Patents
Method for accurately setting optical axis of wedge lens Download PDFInfo
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- CN104483741A CN104483741A CN201410672250.XA CN201410672250A CN104483741A CN 104483741 A CN104483741 A CN 104483741A CN 201410672250 A CN201410672250 A CN 201410672250A CN 104483741 A CN104483741 A CN 104483741A
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- wedge
- shaped lens
- internal focusing
- focusing telescope
- autocollimator
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses a method for accurately setting an optical axis of a wedge lens. A wedge lens optical axis setting datum is built by utilizing a rotary indexing table, a standard lens, an autocollimator and an internal focusing telescope according to a wedge lens wedge angle value given by a manufacturer; the wedge lens is added; the attitude of the wedge lens or the attitude of the internal focusing telescope is adjusted; a method of datum transition and multiple datum composite localization is adopted, so that the aim of accurately setting the optical axis of the wedge lens is achieved. The method for accurately setting the optical axis of the wedge lens has the remarkable effects that based on the principle of plane and curved-surface reflecting far-field imaging, through copying and transmitting the datum and compensating wedge angles, multiple datums are built to monitor plane and curved-surface normal of the wedge lens at the same time, and the accuracy of set wedge lens optical axis is ensured; the optical axis of the wedge lens with different wedge angles, different calibers and different curve radius can be accurately set, and the method is higher in universality and practicability.
Description
Technical field
The present invention relates to optical engineering technical field, specifically, is the accurate axis fixation method of a kind of wedge-shaped lens.
Background technology
At present, known lens axis fixation method is datum hole by lens element being assembled to machining, reference field ensures, or is collimated by near field and realize dead axle, makes the limited precision of lens dead axle.In addition, the focometer on market and centrescope also can only realize short-radius, small-bore coaxial spherical element dead axle, operation inconvenience, and cannot realize wedge-shaped lens element dead axle.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide the accurate axis fixation method of a kind of wedge-shaped lens, the method is based on benchmark transition, multiple benchmark monitoring mode simultaneously, and not only dead axle precision is high, and can realize long radius-of-curvature, bigbore wedge-shaped lens dead axle.
For achieving the above object, the present invention states the accurate axis fixation method of a kind of wedge-shaped lens, it is characterized in that carrying out according to following steps:
Step 1: place one piece of standard mirror on rotary indexing table, at the side of this standard mirror erection autocollimator, the attitude of adjustment autocollimator, collimates standard mirror surface normal;
Step 2: rotary indexing table is turned over the angle identical with the wedge-shaped lens angle of wedge, at the opposite side erection internal focusing telescope of standard mirror, and collimates standard mirror surface normal;
Step 3: add between autocollimator and standard mirror and treat dead axle wedge-shaped lens, the plane of this wedge-shaped lens is towards autocollimator, the curved surface of wedge-shaped lens is towards internal focusing telescope, the attitude of adjustment wedge-shaped lens, and collimated by the plane normal of autocollimator to wedge-shaped lens, and collimated by the center of surface normal of internal focusing telescope to wedge-shaped lens, thus realize the dead axle of wedge-shaped lens.
Before wedge-shaped lens dead axle, first according to the wedge-shaped lens angle of wedge value that manufacturer is given, wedge-shaped lens dead axle benchmark is set up by rotary indexing table, standard mirror, autocollimator and internal focusing telescope, add wedge-shaped lens again, adjustment wedge-shaped lens attitude or adjustment internal focusing telescope attitude, carried out wedge-shaped lens dead axle.Because wedge-shaped lens surface normal is with or without several, be to establish lens curved surface central axis with single benchmark.Therefore the technical program is based on optical imaging concept, adopts the method for benchmark transition and multiple benchmark compound location, reaches the object of the accurate dead axle of wedge-shaped lens.The present invention can ensure the accuracy of the wedge-shaped lens optical axis made; The accurate dead axle of wedge-shaped lens of the different angle of wedge, different bore, different curvature radius can be realized, there is very high versatility and practicality.
As further describing, the concrete steps of described step 3 are:
Step 3-1: the corner of adjustment wedge-shaped lens, and the cross hair picture making the plane reflection through wedge-shaped lens return overlaps with self intrinsic cross hair of autocollimator, the axis of autocollimator points to consistent with the plane surface normal of wedge-shaped lens, namely realizes the collimation of autocollimator to wedge-shaped lens plane normal;
Step 3-2: internal focusing telescope cross hair rear focus is adjusted to infinite distance, then the corner of internal focusing telescope is regulated, make internal focusing telescope penetrate directional light, and the cross hair picture that the surface reflection through standard mirror is returned overlap with self intrinsic autocollimation cross hair of internal focusing telescope;
Step 3-3: internal focusing telescope translation simultaneously focused to it, make internal focusing telescope penetrate cone light, and the cross hair picture that the spheric reflection through wedge-shaped lens is returned overlaps with himself intrinsic cross hair;
Step 3-4: return step 3-2 circulation, until the axis of internal focusing telescope points to consistent with the center of surface normal of wedge-shaped lens, the surface normal of standard mirror, namely realize the collimation of internal focusing telescope to wedge-shaped lens center of surface normal, thus realize the dead axle of wedge-shaped lens.
For the ease of accurately controlling the anglec of rotation, described rotary indexing table adopts gas suspension circular dividing table.
Remarkable result of the present invention is: the principle that the present invention is based on plane and the imaging of spheric reflection far field, transmission is copied by benchmark, the angle of wedge compensates, and sets up multiple benchmark and monitors wedge-shaped lens plane and sphere normal simultaneously, ensure that the accuracy of the wedge-shaped lens optical axis made; Achieve the accurate dead axle of wedge-shaped lens of the different angle of wedge, different bore, different curvature radius, there is very high versatility and practicality.
Accompanying drawing explanation
Fig. 1 is method flow diagram of the present invention;
Fig. 2 sets up plane normal dead axle benchmark schematic diagram in the present invention;
Fig. 3 sets up sphere normal dead axle benchmark schematic diagram in the present invention;
Fig. 4 regulates lens and internal focusing telescope fix-focus lens optical axis schematic diagram in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention and principle of work are described in further detail.
See accompanying drawing 1, the accurate axis fixation method of a kind of wedge-shaped lens, carries out according to following steps:
Step 1: place one piece of standard mirror 2 on rotary indexing table 3, at the side of this standard mirror 2 erection autocollimator 1, as shown in Figure 2, the attitude of adjustment autocollimator 1, the cross hair picture that standard mirror 2 to be measured is reflected back overlaps with self intrinsic autocollimation cross hair of autocollimator 1, namely collimates standard mirror 2 surface normal;
In the present embodiment, described autocollimator 1 adopts Collapex AC300 type digital display photoelectric autocollimator, this collimator has automatic data collection and hold function, be easy to realize intelligentized control method, its main performance index parameter is: autocollimation precision is better than 1 "; angle measurement accuracy is better than 0.3 ", measurable angle range about 1200 ".
Step 2: rotary indexing table 3 is turned over the angle onesize with wedge-shaped lens 5 angle of wedge, at the opposite side erection internal focusing telescope 4 of standard mirror 2, as shown in Figure 3, the cross hair picture that surface reflection through standard mirror 2 is returned overlaps with self intrinsic autocollimation cross hair of internal focusing telescope 4, namely collimates standard mirror 2 surface normal;
In this programme, as preferably, the Anglapex-CA1000 type circular dividing table that described rotary indexing table 3 adopts AcroBeam Co., Ltd. to produce, this circular dividing table main performance index parameter: corner accuracy is better than 1 ", angle range 360 °;
Described internal focusing telescope 4 adopts NWJ-3 type internal focusing telescope, this telescope has near field collimation and far field alignment function, join external CCD and substitute naked-eye observation, its main performance index parameter is: autocollimation precision and angle measurement accuracy are better than 6 ", measurable angle range about 3 °.
Step 3: add between autocollimator 1 and standard mirror 2 and treat dead axle wedge-shaped lens 5, as shown in Figure 4, the plane of this wedge-shaped lens 5 is towards autocollimator 1, the curved surface of wedge-shaped lens 5 is towards internal focusing telescope 4, the attitude of adjustment wedge-shaped lens 5, and collimated by the plane normal of autocollimator 1 pair of wedge-shaped lens 5, and collimated by the center of surface normal of internal focusing telescope 4 pairs of wedge-shaped lens 5, concrete steps are:
Step 3-1: the corner of adjustment wedge-shaped lens 5, the cross hair picture that plane reflection through wedge-shaped lens 5 is returned overlaps with self intrinsic autocollimation cross hair of autocollimator 1, the axis of autocollimator 1 points to consistent with the plane surface normal of wedge-shaped lens 5, namely realizes the collimation of autocollimator 1 pair of wedge-shaped lens 5 plane normal;
Step 3-2: internal focusing telescope 4 cross hair rear focus is adjusted to infinite distance, then the corner of internal focusing telescope 4 is regulated, make internal focusing telescope 4 penetrate directional light, and the cross hair picture that the surface reflection through standard mirror 2 is returned overlap with self intrinsic autocollimation cross hair of internal focusing telescope 4;
Step 3-3: internal focusing telescope 4 translation simultaneously focused to it, make internal focusing telescope 4 penetrate cone light, and the cross hair picture that the spheric reflection through wedge-shaped lens 5 is returned overlaps with himself intrinsic cross hair;
Internal focusing telescope 4 corner can be caused to have deviation phenomenon owing to regulating in internal focusing telescope 4 translation motion, need repeatedly to repeat step 3-2 and step 3-3.
Therefore, enter step 3-4: return step 3-2 circulation, until the axis of internal focusing telescope 4 points to consistent with the sphere normal of wedge-shaped lens 5, the surface normal of standard mirror 2, namely realize the collimation of internal focusing telescope 4 pairs of wedge-shaped lens 5 sphere normals, thus realize the dead axle of wedge-shaped lens 5.
The present invention is based on the principle of plane and the imaging of camber reflection far field, according to the wedge-shaped lens angle of wedge value that manufacturer is given, wedge-shaped lens dead axle benchmark is set up by rotary indexing table, standard mirror, autocollimator and internal focusing telescope, add wedge-shaped lens again, adjustment wedge-shaped lens attitude or adjustment internal focusing telescope attitude, transmission is copied by benchmark, the angle of wedge compensates, set up multiple benchmark to monitor wedge-shaped lens plane and center of surface normal simultaneously, reach the object of the accurate dead axle of wedge-shaped lens.
Claims (3)
1. the accurate axis fixation method of wedge-shaped lens, is characterized in that carrying out according to following steps:
Step 1: the upper placement one piece of standard mirror (2) of rotary indexing table (3), in the side of this standard mirror (2) erection autocollimator (1), the attitude of adjustment autocollimator (1), collimates standard mirror (2) surface normal;
Step 2: rotary indexing table (3) is turned over the angle identical with wedge-shaped lens (5) angle of wedge, at opposite side erection internal focusing telescope (4) of standard mirror (2), and standard mirror (2) surface normal is collimated;
Step 3: add between autocollimator (1) and standard mirror (2) and treat dead axle wedge-shaped lens (5), the plane of this wedge-shaped lens (5) is towards autocollimator (1), the curved surface of wedge-shaped lens (5) is towards internal focusing telescope (4), the attitude of adjustment wedge-shaped lens (5), and collimated by the plane normal of autocollimator (1) to wedge-shaped lens (5), and collimated by the center of surface normal of internal focusing telescope (4) to wedge-shaped lens (5), thus realize the dead axle of wedge-shaped lens (5).
2. the accurate axis fixation method of wedge-shaped lens according to claim 1, is characterized in that: the concrete steps of described step 3 are:
Step 3-1: the corner of adjustment wedge-shaped lens (5), the cross hair picture that plane reflection through wedge-shaped lens (5) is returned overlaps with self intrinsic cross hair of autocollimator (1), the axis of autocollimator (1) points to consistent with the plane surface normal of wedge-shaped lens (5), namely realizes the collimation of autocollimator (1) to wedge-shaped lens (5) plane normal;
Step 3-2: internal focusing telescope (4) cross hair rear focus is adjusted to infinite distance, then the corner of internal focusing telescope (4) is regulated, make internal focusing telescope (4) penetrate directional light, and the cross hair picture that the surface reflection through standard mirror (2) is returned overlap with self intrinsic autocollimation cross hair of internal focusing telescope (4);
Step 3-3: internal focusing telescope (4) translation is focused to it simultaneously, make internal focusing telescope (4) penetrate cone light, and the cross hair picture that the spheric reflection through wedge-shaped lens (5) is returned overlap with himself intrinsic cross hair;
Step 3-4: return step 3-2 circulation, until the axis of internal focusing telescope (4) points to consistent with the center of surface normal of wedge-shaped lens (5), the surface normal of standard mirror (2), namely realize the collimation of internal focusing telescope (4) to wedge-shaped lens (5) center of surface normal, thus realize the dead axle of wedge-shaped lens (5).
3. the accurate axis fixation method of wedge-shaped lens according to claim 1, is characterized in that: described rotary indexing table (3) adopts gas suspension circular dividing table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410672250.XA CN104483741B (en) | 2014-11-20 | 2014-11-20 | Wedge-shaped lens precision axis fixation method |
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| CN201410672250.XA CN104483741B (en) | 2014-11-20 | 2014-11-20 | Wedge-shaped lens precision axis fixation method |
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| CN104483741A true CN104483741A (en) | 2015-04-01 |
| CN104483741B CN104483741B (en) | 2017-07-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679595A (en) * | 2016-12-29 | 2017-05-17 | 福州华友光学仪器有限公司 | Center offset and wedge angle detecting instrument for wedge angle spherical lens and measurement method |
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