A three-ring apodized mirror, its preparation method, and its method for measuring equivigation angle
A three-ring apodized mirror and ring technology, applied in the field of atmospheric optics, can solve the problems of not being able to fully satisfy the evaluation of adaptive optics compensation effects and low measurement accuracy, and achieve improved accuracy, high-precision measurement, and small relative errors Effect
Inactive Publication Date: 2015-10-07
NO 63655 TROOPS OF THE CHINESE PEOPLES LIBERATION ARMY
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Domestic research units in this field mainly include the National Astronomical Observatory of the Chinese Academy of Sciences and the Anhui Institute of Optics and Mechanics. Their technical level is roughly equivalent to the level of the United States in the 1980s. They still use single-aperture apodization mirrors, which are at a relatively early stage and have low measurement accuracy. Fully meet the needs of astronomical optics site selection and adaptive optics compensation effect evaluation when light waves are transmitted in actual turbulent atmosphere
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[0040] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
[0041] After light waves travel through the atmosphere, atmospheric turbulence causes random fluctuations in the intensity of light waves. For the starlight light wave transmitted by a specially designed apodization mirror, its intensity fluctuation has a certain relationship with the equi-halation angle, so the required equi-halation angle can be given by measuring the fluctuation of the star light intensity.
[0042] If the form of the aperture filter function W(z) can be made W(z)≡cz 5 / 3 (c is a constant), then the inversion of the normalized fluctuation variance of starlight intensity measured by formula (2) can be used to obtain the equihalation angle. This is the principle of equi-vigorant angle measurement, and the design of the apodized mirror is also based on this need.
[0043] Th...
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The invention discloses a three-ring apodization lens, a manufacturing method of the three-ring apodization lens and an isoplanatic angle measurement method of the three-ring apodization lens. The three-ring apodization lens is composed of light-proof circular rings and light-permeable circular rings, wherein the light-proof circular rings and the light-permeable circular ring are concentrically and alternately arranged. The light-permeable circular rings sequentially comprise the inner ring, the middle ring and the outer ring from inside to outside, wherein the minimum radius of the inner ring is 37.389mm, the maximum radius of the inner ring is 43.840mm, the minimum radius of the middle ring is 62.890mm, the maximum radius of the middle ring is 69.240mm, the minimum radius of the outer ring is 81.940mm, and the maximum radius of the outer ring is 101.600mm. Compared with a single-aperture apodization lens, the three-ring apodization lens has the advantages that an aperture filter function W(z)=cz5 / 3 can be well simulated at all heights, the relative errors of obtained isoplanatic angles are obviously small, and high accuracy measurement on the isoplanatic angles can be achieved.
Description
technical field [0001] The invention belongs to the technical field of atmospheric optics, and relates to a three-ring apodized mirror, a preparation method thereof, and a method for measuring equivigation angles thereof. Background technique [0002] When light waves are transmitted in the atmosphere, due to the influence of atmospheric turbulence, the wavefront of the light waves will be distorted and the intensity will fluctuate. For the transmission of light waves, including lasers, in the actual atmosphere, atmospheric turbulence causes random deflection of the beam propagation direction, expansion of the beam, and random fluctuations in intensity, which affects optical engineering applications such as lasers. [0003] For ground-based astronomical optical observations, when a large-aperture optical receiving telescope is used to image a space observation target, the wavefront of the light wave emitted by the space observation target will be distorted due to atmospheric...
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IPC IPC(8): G02B5/00G01C1/00
Inventor 强希文宗飞胡月宏吴敏龚新刚常金勇徐云岫
Owner NO 63655 TROOPS OF THE CHINESE PEOPLES LIBERATION ARMY