CN102368114A - Optical system surface shape compensation adjustment method based on wave aberration detection - Google Patents
Optical system surface shape compensation adjustment method based on wave aberration detection Download PDFInfo
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Abstract
The invention relates to an optical system surface shape compensation adjusting method based on wave aberration detection, which comprises the following steps: 1) detecting surface wave aberration of each optical element of the optical system to be adjusted; 2) judging whether the surface shapes of the optical elements of the optical system to be adjusted are complementary or not according to an aplanatism principle, if so, directly exiting the adjusting process of the optical system to be adjusted; if not, performing step 3); 3) the spatial positions of all optical elements of the optical system to be adjusted are adjusted, so that the complementation of element surface wave aberration is realized. The invention provides the optical system surface shape compensation adjustment method based on the wave aberration detection, which has strong pertinence, rapidness in realization, simplicity and convenience in operation and strong practicability.
Description
Technical field
The invention belongs to the optical engineering field, relate to a kind of method of debuging of optical system, relate in particular to a kind of optical system surface shape compensation that detects based on wave aberration and debug method.
Background technology
Influence error that optical system resembles matter mainly from optics, mechanical two aspects.The error of optics aspect mainly is owing to receive the restriction of processing technology level, deviations such as the radius-of-curvature that causes, thickness, off-centre.These deviations machine the back at element and just can not change, but can know the deviate that it is confirmed through Measuring and testing.The error of mechanical aspects mainly is that mechanical component working axiality, verticality etc. are lower than designing requirement, and the optical component surface shape precision that assembling is entered reduces, and produces displacement, off-centre, inclination etc.Ray machine processing, the error in debuging may be summarized to be the thickness deviation, displacement, off-centre, inclination of element etc.They are inequality to the influence of optical system picture element.When optical element exists displacement, thickness deviation, mainly influence the symmetry aberration, the disperse of picture point is increased.There is off-centre in system, tilts then to cause the aberration of asymmetry, for point on the axle, center coma and chromatic longitudiinal aberration is arranged, and makes the diffraction ring of picture point lose symmetry, and has the asymmetry color.Than under the serious situation, also can see two focal lines that separate, i.e. center astigmatism in off-centre at the center of visual field.Simultaneously, the distortion of astigmatism and asymmetry appears in the off-axis image point.The combined influence that all these processing, the error brought of assembling resemble matter to optical system shows as that resolution reduces, distortion increases, the disc of confusion increase of picture point, transport function reduction etc.At this moment,, can compensate because the aberration that foozle is introduced, improve the image quality after the real system assembling through fine setting to the relative space position of each optical element.Classical compensation adjustment method is based on how much meterings and the compensation adjustment method that detects of optics, mechanical component; This method blindness is strong; Need repeated multiple times operation, and the technician who needs rich experiences operates, use very inconvenient; Simultaneously, this method does not relate to the possible corrugated compensation adjustment method based on the aplanatism principle that wave aberration that optical elements of large caliber and system often carry out detects and brings thus.
Summary of the invention
In order to solve the above-mentioned technical matters that exists in the background technology, the invention provides a kind of optical system surface shape compensation based on the wave aberration detection with strong points, that realization is fast, easy and simple to handle and practical and debug method.
Technical solution of the present invention is: the invention provides a kind of optical system surface shape compensation that detects based on wave aberration and debug method, its special character is: the said optical system surface shape compensation that detects based on wave aberration is debug method and may further comprise the steps:
1) the face shape wave aberration of each optical element of detection light modulation to be installed system;
2), judge whether the face shape of each optical element of light modulation to be installed system exists complementation, if then directly withdraw from the process of debuging of light modulation to be installed system according to the aplanatism principle; If not, then carry out step 3);
3) treat the locus of debuging each optical element of optical system and adjust, achieve the complementation of component side shape wave aberration.
Above-mentioned steps 2) judgment mode that face shape is complementary in is:
2.1) the face shape wave aberration of each optical element of light modulation to be installed system that has obtained in the step 1) is carried out vector superposed, and the face shape wave aberration vector of each optical element after obtaining superposeing with;
2.2) if the face shape wave aberration vector of each optical element after the stack and absolute value reduce, the face shape of each optical element of light modulation then to be installed system is complementation; If the face shape wave aberration vector of each optical element after the stack and absolute value increase, the face shape of each optical element of light modulation then to be installed system is non-complementary.
Above-mentioned steps 3) treating the mode of the locus of debuging each optical element of optical system adjusting in is: treat and debug each optical element of optical system and carry out translation, rotation or inclination.
Advantage of the present invention is:
The invention provides a kind of optical system surface shape compensation that detects based on wave aberration and debug method; This method adopts when how much misalignment rates of each optical element in the system are zero; If only there is the face shape error of optical element, then the wave aberration of the final image planes of system will be by the principle of the unique decision of face shape wave aberration of each optical element, under the prerequisite that does not change other structural relation of optical system; Through simple adjustment operations such as rotations; Can optical element face shape error adjustment in the optical system be reached mutual wave aberration complementary relationship, thereby thereby reaching the purpose that the optimization system wave aberration improves the system imaging quality, it debugs the process simple controllable; Simple to operate, practical.
Description of drawings
Fig. 1 is the process of a debuging synoptic diagram of debuging method provided by the invention.
Embodiment
Principle of the present invention is: light in arbitrary medium when any propagates into another; Along the shortest propagated of required time; This principle is claimed least time principle or extremely short light path principle again, and this is the Fermat principle (Fermat ' s Principle) that French mathematician Fermat (Pierre de Fermat) at first proposed in 1657.Fermat principle is an important principles in the geometrical optics, rectilinear propagation law, reflection and the refraction law deferred to when the provable light of principle is propagated in uniform dielectric thus, and the aplanatism property etc. of optical system under the paraxial condition.Therefore the design process of all imaging optical systems is all followed aplanatism property principle.
According to above-mentioned principle, the invention provides a kind of optical system surface shape compensation that detects based on wave aberration and debug method, this method may further comprise the steps:
1) the face shape wave aberration of each optical element of detection light modulation to be installed system;
2), judge whether the face shape of each optical element of light modulation to be installed system exists complementation, if then directly withdraw from the process of debuging of light modulation to be installed system according to the aplanatism principle; If not, then carry out step 3):
Its complementary deterministic process is:
2.1) the face shape wave aberration of each optical element of light modulation to be installed system that has obtained in the step 1) is superposeed, and the face shape wave aberration vector of each optical element after obtaining superposeing with;
2.2) if the face shape wave aberration vector of each optical element after the stack with absolute value reduce, the face shape of each optical element of light modulation then to be installed system is complementation; If the face shape wave aberration vector of each optical element after the stack with absolute value increase, the face shape of each optical element of light modulation then to be installed system is non-complementary.
3) treat the adjustment that translation, rotation and/or inclination etc. are carried out in the locus of debuging each optical element of optical system, make the face shape of each optical element of light modulation to be installed system reach complementary.
Referring to Fig. 1, to be example debug method to the optical system surface shape compensation that detects based on wave aberration provided by the present invention carries out detailed explanation with optical system shown in Figure 1 in the present invention.In Fig. 1, this optical system comprises primary mirror, secondary mirror, object point O and picture point I, and wherein, solid line is represented the face structure synoptic diagram of each optical element under the perfect condition; Dotted line is represented the effective surface shape structural representation of actual each optical element that obtains; When the face shape wave aberration of primary mirror is W
Main(the represented face shape wave aberration of dotted line just), secondary mirror shape wave aberration is W
SecWhen (the represented face shape wave aberration of dotted line just), the spherical wave W that object point O sends
OWave aberration W with picture point I place
ICan be expressed as:
W
I＝W
O+k
mW
main+k
sW
sec
K wherein
mBe the pupil enlargement ratio of primary mirror to secondary mirror, k
sBe the pupil enlargement ratio of secondary mirror to image planes, by the system structure parameter decision, then according to the aplanatism principle of design, there is complementary relationship in the face shape error of primary mirror and secondary mirror.That is to say, suppose that if only there is the face shape error of optical element, then the wave aberration of the final image planes of system will be by the unique decision of face shape wave aberration of each optical element when how much misalignment rates of each optical element in the system are zero.
Claims (3)
1. an optical system surface shape compensation that detects based on wave aberration is debug method, it is characterized in that: the said optical system surface shape compensation that detects based on wave aberration is debug method and may further comprise the steps:
1) the face shape wave aberration of each optical element of detection light modulation to be installed system;
2), judge whether the face shape of each optical element of light modulation to be installed system exists complementation, if then directly withdraw from the process of debuging of light modulation to be installed system according to the aplanatism principle; If not, then carry out step 3);
3) treating the locus of debuging each optical element of optical system adjusts.
2. the optical system surface shape compensation that detects based on wave aberration according to claim 1 is debug method, it is characterized in that: the judgment mode that face shape is complementary said step 2) is:
2.1) the face shape wave aberration of each optical element of light modulation to be installed system that has obtained in the step 1) is superposeed, and the face shape wave aberration vector of each optical element after obtaining superposeing with;
2.2) if the face shape wave aberration vector of each optical element after the stack and absolute value reduce, the face shape of each optical element of light modulation then to be installed system is complementation; If the face shape wave aberration vector of each optical element after the stack and absolute value increase, the face shape of each optical element of light modulation then to be installed system is non-complementary.
3. the optical system surface shape compensation that detects based on wave aberration according to claim 1 and 2 is debug method, it is characterized in that: treating the mode of the locus of debuging each optical element of optical system adjusting in the said step 3) is: treat and debug each optical element of optical system and carry out translation, rotation or inclination.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322942A (en) * | 2013-07-15 | 2013-09-25 | 中国科学院光电技术研究所 | Method for detecting surface shape of each optical element of optical system based on wave aberration |
| CN103969034A (en) * | 2014-04-30 | 2014-08-06 | 中国科学院长春光学精密机械与物理研究所 | Method for evaluating stability of optical-mechanical structure based on optical system misalignment rate solution |
| CN109739019A (en) * | 2019-03-14 | 2019-05-10 | 南开大学 | Coaxial freeform optics Optimized System Design method based on Vector aberration theory |
| CN110634372A (en) * | 2019-09-29 | 2019-12-31 | 中国科学院长春光学精密机械与物理研究所 | Optical system installation and adjustment strategy verification system |
| CN112697398A (en) * | 2020-12-10 | 2021-04-23 | 中国科学院光电技术研究所 | Calculation method for wave aberration residual errors detected twice before and after spatial position change |
| CN112782848A (en) * | 2021-01-19 | 2021-05-11 | 北京理工大学 | Optical encryption system based on variable lens wave aberration modulation |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322942A (en) * | 2013-07-15 | 2013-09-25 | 中国科学院光电技术研究所 | Method for detecting surface shape of each optical element of optical system based on wave aberration |
| CN103969034A (en) * | 2014-04-30 | 2014-08-06 | 中国科学院长春光学精密机械与物理研究所 | Method for evaluating stability of optical-mechanical structure based on optical system misalignment rate solution |
| CN103969034B (en) * | 2014-04-30 | 2016-04-27 | 中国科学院长春光学精密机械与物理研究所 | A kind of mechanical-optical setup stability assessment method resolved based on optical system misalignment rate |
| CN109739019A (en) * | 2019-03-14 | 2019-05-10 | 南开大学 | Coaxial freeform optics Optimized System Design method based on Vector aberration theory |
| CN110634372A (en) * | 2019-09-29 | 2019-12-31 | 中国科学院长春光学精密机械与物理研究所 | Optical system installation and adjustment strategy verification system |
| CN112697398A (en) * | 2020-12-10 | 2021-04-23 | 中国科学院光电技术研究所 | Calculation method for wave aberration residual errors detected twice before and after spatial position change |
| CN112697398B (en) * | 2020-12-10 | 2023-09-19 | 中国科学院光电技术研究所 | Calculation method for detecting wave aberration residual error twice before and after spatial position change |
| CN112782848A (en) * | 2021-01-19 | 2021-05-11 | 北京理工大学 | Optical encryption system based on variable lens wave aberration modulation |
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Application publication date: 20120307 |