Optical Testing with a Knife Edge Interferometer

Korneev, N.; Agustín, Fermín S. Granados; Xochihuila, Pedro Cebrian; Díaz-Uribe, Rufino; Rodríguez, Alejandro Cornejo

doi:10.1088/1742-6596/274/1/012063

Cited by 3 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…as an example. It is worth to mention that a characteristic of this interferometer, is that depending upon the position an orientation of the knife edge along or around the optical axis, the interference patterns are observed with different positions at the screen [8].…”

Section: Resultsmentioning

confidence: 99%

Analysis of interferograms of a lens using a knife edge interferometer

et al. 2011

Self Cite

View full text Add to dashboard Cite

In previous works Korneev, et al. and Cornejo, et. al. [1]. Shown the feasibility to produce an interference pattern, by setting near by the focal point of a lens a razor knife edge. The interference phenomena is produced between the wavefront coming from the lens, and the wavefront produced by the knife edge. In this work, such technique is applied for testing a lens. Since partial interferograms are observed, due to the obstruction of the knife edge to the wavefront coming from the lens; by rotation of the knife edge in several directions, interferograms with different information can be registered by means of a CCD connected to a PC. Experimental measurements are given after several interferograms with different number of fringes were analyzed.

show abstract

Section: Resultsmentioning

confidence: 99%

Analysis of interferograms of a lens using a knife edge interferometer

et al. 2011

Self Cite

View full text Add to dashboard Cite

show abstract

“…(3) and (4) are listed as L 2 T and L 2 T, respectively. Small differences can be noticed between the values for the theoretical values.…”

Section: Mathematical Analysismentioning

confidence: 99%

“…Therefore, the environment does not affect the experimental setup and the interference pattern is nonlocalized. As will be shown in the next sections, a disadvantage is that partial interferograms are observed, but different interferograms can be produced depending on the orientation of the knife edge, and fast qualitative analysis can be realized, [2][3][4] to find out the quality of the lens or optical system tested. In this paper, for the first time, quantitative results are given for testing a certified lens from Zygo Co (Middlefield, Connecticut).…”

Section: Introductionmentioning

confidence: 99%

Knife edge interferometer, part I: with collimated beam

et al. 2014

Self Cite

View full text Add to dashboard Cite

Some experimental qualitative results are presented with a setup that uses a knife edge for producing partial interferograms, in order to obtain the quality of a lens under test. However, the same method can be extended to test an optical surface. The knife edge is located near the focal point of the lens, covering almost half of the incident laser light beam. The different observed interferograms correspond to the orientation of the knife edge with respect to the optical axis, and its distance to the focus of the lens. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

show abstract

Knife-edge interferogram analysis for corrosive wear propagation at sharp edges

Wang

Lee

2021

Appl. Opt.

View full text Add to dashboard Cite

This paper presents a novel noncontact measurement and inspection method based on knife-edge diffraction theory for corrosive wear propagation monitoring at a sharp edge. The degree of corrosion on the sharp edge was quantitatively traced in process by knife-edge interferometry (KEI). The measurement system consists of a laser diode, an avalanche photodiode, and a linear stage for scanning. KEI utilizes the interferometric fringes projected on the measurement plane when the light is incident on a sharp edge. The corrosion propagation on sharp edges was characterized by analyzing the difference in the two interferometric fringes obtained from the control and measurement groups. By using the cross-correlation algorithm, the corrosion conditions on sharp edges were quantitatively quantified into two factors: lag and similarity for edge loss and edge roughness, respectively. The KEI sensor noise level was estimated at 0.03% in full scale. The computational approach to knife-edge diffraction was validated by experimental validation, and the computational error was evaluated at less than 1%. Two sets of razor blades for measurement and control groups were used. As a result, the lag will be increased at an edge loss ratio of 1.007/µm due to the corrosive wear, while the similarity will be decreased at a ratio of 5.4 × 10 − 4 / µ m with respect to edge roughness change. Experimental results showed a good agreement with computational results.

show abstract

Optical Testing with a Knife Edge Interferometer

Cited by 3 publications

References 1 publication

Analysis of interferograms of a lens using a knife edge interferometer

Analysis of interferograms of a lens using a knife edge interferometer

Knife edge interferometer, part I: with collimated beam

Knife-edge interferogram analysis for corrosive wear propagation at sharp edges

Contact Info

Product

Resources

About