Application of Ronchi Grating to the Quantitative Measurement of Large-aperture Aspheric Surfaces

Baiping, 雷柏平 Lei; Fan, 伍凡 Wu; Chenbo, 周晨波 Zhou

doi:10.3788/aos20092909.2441

Cited by 1 publication

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“…From then on, it has been used widely to the testing of optical surfaces as one of the simplest and most powerful methods [1] .At first, it was used to evaluate and measure the aberrations of an optical surface or system only in a qualitative way. Then with the requirement of the fabrication of the large aspheric optical surfaces, the diameter of which will be tens of meters, the classical Ronchi grating test can measure the optical surfaces in a quantitative way [2] [3] .Most important, it can evaluate the large error that comes out when the optical surface is grinded, while the interferometer is unfit any more, and so can't the device of the three dimensional measurement system dose for the extremely large optical surface [4] . There are many papers about the application of Ronchi grating test to quantitative measurement the optical surface [5~9] .…”

Section: Introductionmentioning

confidence: 99%

Analysis on the system error cause by lateral departure of the light source during Ronchi test

Lei

2010

SPIE Proceedings

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The Ronchi test is very useful for the testing of large aperture astronomical optical element, and will be more useful with the achievement of testing in a quantitative way. While when it comes to application, the light source should has a certain extent lateral departure away from the optical axis so that the image of it is apart away form itself and can be captured. This lateral departure produces the system error in the measurement. By means of optical design software, this paper studies the system error of the Ronchi test produced by the lateral departure of light source on the base of the simulation and the calculation of error according to the different distances from the optical axis, and discusses the conditions satisfied with a certain measurement requires on the foundation of the outcome. Then a system device including the light source that can be used in the practice of the measurement is designed. This device also is very useful for the other testing methods that need a high power and large relative diameter light source.

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Section: Introductionmentioning

confidence: 99%

Analysis on the system error cause by lateral departure of the light source during Ronchi test

Lei

2010

SPIE Proceedings

View full text Add to dashboard Cite

show abstract

Application of Ronchi Grating to the Quantitative Measurement of Large-aperture Aspheric Surfaces

Cited by 1 publication

References 0 publications

Analysis on the system error cause by lateral departure of the light source during Ronchi test

Analysis on the system error cause by lateral departure of the light source during Ronchi test

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