&lt;title&gt;Influence Of Alignment Errors Of A Telescope System On Its Aberration Field&lt;/title&gt;

Shack, Roland V.; Thompson, Kevin P.

doi:10.1117/12.959464

Cited by 121 publications

(44 citation statements)

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“…This could subsequently be used to modify the alignment of the optical system in such a way as to minimize the overall level of aberrations or for testing the quality of individual optical components (objective lens, tube lens). Several studies have been carried out to develop a theory of misalignment effects on the full-field aberration maps, mostly for aligning telescopes for astronomy applications [3][4][5][6]. Here, we present details of a technique to adapt the Shack-Hartmann test for measuring the full-field aberration map of a WSI system, and we present an analysis of the fullfield aberration maps for revealing different misalignment root causes such as decenter and tilt of optical components.…”

Section: Introductionmentioning

confidence: 99%

Shack-Hartmann sensor based optical quality testing of whole slide imaging systems for digital pathology

et al. 2015

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Whole Slide Imaging (WSI) systems are used in the emerging field of digital pathology for capturing high-resolution images of tissue slides at high throughput. We present a technique to measure the optical aberrations of WSI systems using a Shack-Hartmann wavefront sensor as a function of field position. The resulting full-field aberration maps for the lowest order astigmatism and coma are analyzed using nodal aberration theory. According to this theory two coefficients describe the astigmatism and coma inherent to the optical design and another six coefficients are needed to describe the cumulative effects of all possible misalignments on astigmatism and coma. The nodal aberration theory appears to fit well to the experimental data. We have measured and analyzed the full-field aberration maps for two different objective lens-tube lens assemblies and found that only the optical design related astigmatism coefficient differed substantially between the two cases, but in agreement with expectations. We have also studied full-field aberration maps for intentional decenter and tilt and found that these affect the misalignment coefficient for constant coma (decenter) and the misalignment coefficient for linear astigmatism (tilt), while keeping all other nodal aberration theory coefficients constant.

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Section: Introductionmentioning

confidence: 99%

Shack-Hartmann sensor based optical quality testing of whole slide imaging systems for digital pathology

et al. 2015

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“…It is evident from the expression that the disturbance of the position of the optical elements will not affect the spherical aberration but contribute significantly to the coma and astigmatic wave aberrations in the optical systems [3][4][5]. In order to simplify the analytical process while analyzing the vector wave aberrations of the misaligned systems, we pay more attention to these two aberrations.…”

Section: A Mathematical Model For the Vector Wave Aberration Of An Opmentioning

confidence: 99%

“…Therefore, analogous to the aligned systems, the misaligned systems have an effective field of view H Aj which is related to the offset vector through the relation H Aj = H j -j . Therefore, the third-order wave aberrations for the misaligned systems can be expressed in vector form as given below [8,9]:…”

Section: A Mathematical Model For the Vector Wave Aberration Of An Opmentioning

confidence: 99%

“…In 1976, R. A. Buchroeder described the vector wavefront aberrations on the basis of the polar coordinate system. Then, Buchroeder [3], Shack [4], Thompson [4,6], and Turne [5] conducted more in-depth studies of aberrations and advanced the development of new aberration technologies. By integrating the vector wavefront aberration theory with interference detection technology, one can obtain data relating to the deviations of the components within an optical system, so this method can be used as a guideline for the alignment of optical systems.…”

Section: Introductionmentioning

confidence: 99%

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An alignment method for the reflective zoom system by applying vector wavefront aberration theory

Zhou

Chang

Ouyang

et al. 2016

Optik

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“…As shown in its functional form in Figure 12, the gradient in the 45-deg astigmatism in one axis must normally shows up with the same magnitude but opposite sign in the 90-deg astigmatism in the other axis. The measurement did not exactly reflect this theory [9][10][11] [12], which was an issue in translating the result into the alignment estimate of the M4 and M5. …”

Section: Figure 11mentioning

confidence: 99%

Delivery, installation, on-sky verification of the Hobby Eberly Telescope wide field corrector

et al. 2016

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The Hobby-Eberly Telescope (HET) † , located in West Texas at the McDonald Observatory, operates with a fixed segmented primary (M1) and has a tracker, which moves the prime-focus corrector and instrument package to track the sidereal and non-sidereal motions of objects. We have completed a major multi-year upgrade of the HET that has substantially increased the pupil size to 10 meters and the field of view to 22 arcminutes by deploying the new Wide Field Corrector (WFC), new tracker system, and new Prime Focus Instrument Package (PFIP). The focus of this paper is on the delivery, installation, and on-sky verification of the WFC. We summarize the technical challenges encountered and resolutions to overcome such challenges during the construction of the system. We then detail the transportation from Tucson to the HET, on-site ground verification test results, post-installation static alignment among the WFC, PFIP, and M1, and on-sky verification of alignment and image quality via deploying multiple wavefront sensors across 22 arcminutes field of view. The new wide field HET will feed the revolutionary new integral field spectrograph called VIRUS, in support of the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX), a new low resolution spectrograph (LRS2), an upgraded high resolution spectrograph (HRS2), and later the Habitable Zone Planet Finder (HPF).

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<title>Influence Of Alignment Errors Of A Telescope System On Its Aberration Field</title>

Cited by 121 publications

References 0 publications

Shack-Hartmann sensor based optical quality testing of whole slide imaging systems for digital pathology

Shack-Hartmann sensor based optical quality testing of whole slide imaging systems for digital pathology

An alignment method for the reflective zoom system by applying vector wavefront aberration theory

Delivery, installation, on-sky verification of the Hobby Eberly Telescope wide field corrector

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