Showing papers by "Alberto Cordero-Dávila published in 2013"
TL;DR: In this article, it was shown that fdr depends on relative velocity, v, and concentration, ρ, of the polisher suspension, and therefore the Preston equation has to be modified i.e. h = h(ffr(v), ρ).
6 citations
TL;DR: To simulate the ronchigram irradiances the authors used ruling with cosinusoidal transmittance instead of Ronchi ruling and several examples of bironchigrams are shown for spherical surface affected by local and/or radial errors; and surfaces used in ophthalmic progressive lenses.
4 citations
18 Nov 2013
TL;DR: The control system design of a rail system with two degrees of freedom is presented, which allows semiautomatic alignment of the Ronchi tester with the surface in production, which more closely resembles the experimental ronchigram.
Abstract: In this paper, we propose the design of a robotic system to semi-automatically align components in the Ronchi test; the robotic system will align the Ronchi tester with the surface being tested. In this work, we present the control system design of a rail system with two degrees of freedom, which allows semiautomatic alignment of the Ronchi tester with the surface in production. Informative visual markings (IVM) are used to achieve this [1]. The IVM help locate the system coordinates of the optical surface with respect to the basic system coordinates of the rail system. Quantification of the alignment is performed using the value of non-integer interference order, which is calculated to generate the simulated ronchigram which more closely resembles the experimental ronchigram [2].
18 Nov 2013
TL;DR: In this paper, the design and analysis of a mechanical system with some interchangeable basic mounts which allow for the application of both Ronchi and Fizeau tests for the evaluation of concave reflective surfaces with a diameter of 2 to 10 cm.
Abstract: Nowadays, there is a demand for more efficient opto-mechanical mounts which allow for the implementation of robust optical arrays in a quick and simple fashion. That is to say, mounts are needed which facilitate alignment of the optical components in order to perform the desired movements of each component. Optical testing systems available in the market today are costly, heavy and sometimes require multiple kits depending on the dimensions of the optical components. In this paper, we present the design and analysis of a mechanical system with some interchangeable basic mounts which allow for the application of both Ronchi and Fizeau tests for the evaluation of concave reflective surfaces with a diameter of 2 to 10 cm. The mechanical system design is done using the methodology of product design process, while the analysis is performed using the commercial software SolidWorks.