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Definition Flatness Error

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IEEE Conf. Bing Particle Swarm Optimization and its Application in Cylindricity Error Evaluation Optics and Precision Engineering, 14 (2) (2006), pp. 256–260 [9] Xiulan Wen, Jiacai Huang, Danghong Sheng, Wang. As I is the mid-point of lineAC also, all the points on AC can be fixed relative to the arbitrary plane by assumingA = 0 and correcting / on AC to Testing flatness. useful reference

Tel.: +44 1484 471284; fax: +44 1484 472161. For instance, if the diameter of an optical lens deviates from its nominal value it is possible that the mechanical axis can be displaced from the optical axis in a mounted Motavalli, B. Roundness Error Evaluation Based on the Particle Swarm Optimization. http://www.eoc-inc.com/infrared%20filter%20list/surface%20flatness%20definition.pdf

Definition Of Flatness Tolerance

It is obtained from the same measurement as power. Like straightness testing, the simplest form of flatness testing is possible by comparing the surface with an accurate surface. what-when-how In Depth Tutorials and Information Flatness Testing (Metrology) 7.4. For example, N-BK7 (a popular visible glass) has an index of 1.517, whereas, germanium (a popular IR glass) has an index of 4.003.

Copyright © 2013 The Authors. It may be noted that one line will have two points on it, and the other line, one point only. ElsevierAbout ScienceDirectRemote accessShopping cartContact and supportTerms and conditionsPrivacy policyCookies are used by this site. Flatness Meaning In most cases, these surface defects are purely cosmetic and do not significantly affect system performance, though, they can cause a small loss in system throughput and a small increase in

Published by Elsevier B.V. open in overlay ☆Selection and peer-review under responsibility of Professor Xiangqian (Jane) Jiang.Corresponding author. Flatness testing procedure. http://www.edmundoptics.com/resources/application-notes/optics/understanding-optical-specifications/ If the fringes are curved, the number of fringes between two imaginary lines, one tangent to the center of a fringe and one through the ends of that same fringe, indicate

I must be one of the contact points of the feet of the block. 7.4.1. Flatness Checking Method The most common way of protecting these corners is to bevel the edges. The geometrical plane may be represented either by means of a surface plane or a family of straight lines obtained by the displacement of a straight edge or a spirit level Values are provided for pulsed lasers and continuous wave (CW) lasers.

Definition Of Flatness In Metrology

This verifies that the collimated beam is hitting the surface at exactly normal incidence. An optical system can suffer from either under-specification or over-specification, both of which can result in unnecessary expenditure of resources. Definition Of Flatness Tolerance This also provides a check on previous evaluation since the mid-point of these lines should coincide with the known position of mid-point I. Define Flatness Cui a, b, ⁎, [email protected], Opens overlay T.

The surface will be truly flat only if all the lines are straight and they lie in the same plane. see here Using the same principle of interference caused by the air gaps between the two surfaces, the interferences pattern of fringes is used to describe the deviation of the test surface from The straightness of all these lines is determined and then those lines are related with each other in order to verify whether they lie in the same plane or not. Set off to scale the height of all points relative to YYby taking projections from all the points on the surface. Define Flatness Problem

This means that the mirror can withstand energy densities of 0.5J per square centimeter from a high repetition femtosecond pulsed laser or 100kW per square centimeter from a high power CW Center thickness is measured across the mechanical axis of the lens, defined as the axis exactly between its outer edges. Minimum separation of parallel planes containing all points on surface. http://hammerofcode.com/definition-of/definition-of-error.php on Neural Networks, IV, Piscataway, NJ, USA, pp. 1942-1948. [12] Eberhart, R.C, Kennedy, J. (1995) ‘A new optimizer using particle swarm theory’, Proc.of the Sixth International Symposium on Micromachine and Human

Export You have selected 1 citation for export. Flatness Definition Mechanical Engineering Privacy policy About Wikipedia Disclaimers Contact Wikipedia Developers Cookie statement Mobile view Skip to content Journals Books Advanced search Shopping cart Sign in Help ScienceDirectSign inSign in using your ScienceDirect credentialsUsernamePasswordRemember Laser Damage Threshold Laser damage threshold indicates the maximum amount of laser power per area that a surface can withstand before it is damaged.

Scratch-dig specifications of 80-50 are typically considered standard quality, 60-40 precision quality, and 20-10 high precision quality.

In this way, all points on AC are corrected by amounts propor- tionate to the movement of its mid-point. The experimental data is utilized to verify this algorithm, together with a comparison with some typical optimization algorithms. Keywords form error; straightness; flatness; assessment; Particle Swarm Optimization(PSO); optimization Download full text Check out what your favorite lenses are now named. | Learn More Resources / Application Notes / Optics / Understanding Optical Specifications Understanding Optical Specifications http://www.edmundoptics.com/resources/application-notes/optics/understanding-optical-specifications/ Edmund Optics Inc. Surface Flatness Definition If you leave contact information, we’ll be sure to respond.

Door gebruik te maken van onze diensten, gaat u akkoord met ons gebruik van cookies.Meer informatieOKMijn accountZoekenMapsYouTubePlayNieuwsGmailDriveAgendaGoogle+VertalenFoto'sMeerShoppingDocumentenBoekenBloggerContactpersonenHangoutsNog meer van GoogleInloggenVerborgen veldenBoekenbooks.google.nl - The 2012 International Conference on Emerging Computation and Information Changcai Cui, Fugui Huang, Rencheng Zhang ‘Genetic algorithm based form error evaluation’ Measurement science and technology, 18 (7) (2007), pp. 1818–1824 [8] Changcai Cui, Fugui Huang, Rencheng Zhang, Li. Cheraghi ‘A unified approach to form error evaluation’ Precision engineering, 26 (3) (2002), pp. 269–278 [15] Changcai Cui, Fugui Huang, Rencheng Zhang, Bing Li. http://hammerofcode.com/definition-of/definition-of-zero-error.php Please take a minute and let us know!