Substructured Ronchi gratings from the linear combination of classical gratings

Aguirre-Aguirre, Daniel; Villalobos-Mendoza, Brenda; Granados-Agustín, Fermín; Izazaga-Pérez, Rafael; Campos‐García, Manuel; Percino-Zacarías, M. E.; Cornejo-Rodriguez, Alejandro

doi:10.1117/1.oe.53.11.114111

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…As an alternative, daylight along with an aluminum foil placed behind the Ronchi ruling to cover half of the grating was employed, removing the tungsten lamp and the auxiliary lenses [4,5]. Light-emitting diodes (LEDs) were then used to replace the tungsten lamp, dispensing with auxiliary lenses [6,7], at this point the problem of heating the Ronchi ruling was solved. Currently, the Ronchi tester finds application in optical system alignment [8][9][10][11], it is used to evaluate aberrations based on the shape of the ronchigram, and it facilitates the estimation of parameters like focal distance and curvature radius or to compare between a simple lens and a doublet [12].…”

Section: Introductionmentioning

confidence: 99%

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Double light source Ronchi Tester for detection of ruling rotations

Nuñez-Alfonso,

Salinas-Luna,

Nuñez-Moreno

et al. 2024

Phys. Scr.

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In this work, a modified Ronchi tester with a double light source has beenimplemented for evaluating and minimizing the rotation angle of the Ronchi ruling.The ruling rotations produced by positioning errors can become very small and couldbe going unnoticed (0.1◦), however we have demonstrated that for these angle sizesthe aberrations in the wavefront can not be completely neglicted. Accordingly witha rotatory mechanical device for correctioning the Ronchi ruling has been also addedwith this proposals. With our aim, in spite of non-straight shape that the ronchigramscan present in the patterns, the process of the ruling rotation degree measuring hashurled some experimental results when three concave mirrors: a concave sphericalmirror, a concave parabolic mirror (the primary mirror of a Newtonian telescope) anda spherical concave mirror (the primary mirror of a Maksutov-Cassegrain telescope)have been tested.

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Section: Introductionmentioning

confidence: 99%

“…Enhancements were also directed towards wavelength control by employing a monochromatic light source [6,7,16,17]. In some cases, additional optical components were introduced, such as a microscope objective and a laser, to generate a divergent monochromatic wavefront [17].…”

Section: Introductionmentioning

confidence: 99%

Double light source Ronchi Tester for detection of ruling rotations

Nuñez-Alfonso,

Salinas-Luna,

Nuñez-Moreno

et al. 2024

Phys. Scr.

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“…In this case, the widths of the stripes (transparent or opaque) are unequal; they can be considered positive if the width of the transparent stripes is greater than that of the opaque stripes, and negative if the width of the opaque stripes is greater than that of the transparent stripes. On the other hand, the use of liquid crystal display (LCD) for Ronchi grid display has been widely used due to its versatility in strip display; however, the LCD must be properly calibrated as discussed in some references where LCD is used for Ronchi grid display [6,[11][12][13][14]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Qualitative evaluation of a parabolic mirror with substructured Ronchi gratings

Campos-García,

Granados-Agustín,

Aguirre-Aguirre

et al. 2024

Rev. Mex. Fís.

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In this work we propose to qualitatively test the quality of a concave parabolic mirror by means of the Ronchi interferometric test using substructured gratings to increase the sharpness of the fringes. The substructured gratings are designed considering that the grating period is divided into several stripes of equal width that can be transparent or opaque; the transmission coefficients of the stripes along the grating period are not periodic, but a previously chosen binary sequence. Equations were derived to obtain the corresponding intensity profiles and an analysis of these profiles was performed for different sequences and positions of the substructured gratings with respect to the test mirror. It was experimentally verified that the fringes are sharper at the Rayleigh distance inside and outside the mirror focus.

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Nonparaxial geometrical Ronchi test for spherical mirrors: an inverse ray-tracing approach

Juarez-Salazar

2016

Appl. Opt.

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A geometrical model based on an inverse ray-tracing approach to describe the Ronchi test for a concave spherical mirror is presented. In contrast to the conventional ray-tracing method, which refers to information unavailable in ronchigrams, the proposed model provides an explicit relation between the available information in the ronchigram and the parameters of the setup (radius of the sphere, position of the source, position and orientation of the observation, and grating planes). This allows for extracting the parameters of interest by a simple fitting procedure, as demonstrated by an application. The derived model exhibits new unexplored potential applications of the Ronchi test, establishing it as a very useful, simple, and universal tool for optical evaluation.

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Substructured Ronchi gratings from the linear combination of classical gratings

Cited by 4 publications

References 13 publications

Double light source Ronchi Tester for detection of ruling rotations

Double light source Ronchi Tester for detection of ruling rotations

Qualitative evaluation of a parabolic mirror with substructured Ronchi gratings

Nonparaxial geometrical Ronchi test for spherical mirrors: an inverse ray-tracing approach

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