Curvature effect on surface generation and uniform scallop height control in normal grinding of optical components

MULTI-POINT MACHINING WITH ANTI-GOUGING AND SCALLOP HEIGHT CONTROL

Transactions of the Canadian Society for Mechanical Engineering ◽

10.1139/tcsme-2004-0004 ◽

2004 ◽

Vol 28 (1) ◽

pp. 25-42 ◽

Cited By ~ 1

Author(s):

Andrew Warkentin

Keyword(s):

Scallop Height ◽

Height Control

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Modelling of Ultra-Precision Turning Processes in Consideration of Unbalances

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.223.839 ◽

2011 ◽

Vol 223 ◽

pp. 839-848 ◽

Cited By ~ 2

Author(s):

Christina Brandt ◽

Jenny Niebsch ◽

Jost Vehmeyer

Keyword(s):

Surface Quality ◽

High Surface ◽

Machining Process ◽

Surface Generation ◽

Generation Process ◽

Optical Components ◽

Diamond Machining ◽

Precision Turning ◽

Ultra Precision ◽

Machine Interaction

In order to manufacture optical components or mechanical parts with high surface roughness requirements, diamond machining is used. To achieve the desired surface quality, the understanding of the surface generation process and its inﬂuencing parameters is important. Here, the crucial parameter is the residual unbalance of the main spindle. As the residual un-balance aﬀects the process and vice versa, the investigation of the process-machine interaction is necessary. In this paper we present a model describing this interaction between dynamical unbalances that occur during the machining process and the engine-shaft structure at the example of an ultra-precision turning lathe. This model allows the determination of the achievable surface quality of a workpiece for a given balancing state. On the other hand we will present a mathematical method to solve the corresponding inverse problem of computing the necessary residual balancing state and balancing weights for a given desired or given measured surface quality.

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Preparation of Thin Cadmium Telluride Samples for Electron Microscope Studies

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052754 ◽

1974 ◽

Vol 32 ◽

pp. 548-549

Author(s):

T. J. Magee ◽

J. Peng ◽

J. Bean

Keyword(s):

Electron Microscope ◽

Sulfuric Acid ◽

Solid State ◽

Sample Preparation ◽

Cadmium Telluride ◽

Potassium Dichromate ◽

Optical Components ◽

The Past ◽

Solid State Devices

Cadmium telluride has become increasingly important in a number of technological applications, particularly in the area of laser-optical components and solid state devices, Microstructural characterizations of the material have in the past been somewhat limited because of the lack of suitable sample preparation and thinning techniques. Utilizing a modified jet thinning apparatus and a potassium dichromate-sulfuric acid thinning solution, a procedure has now been developed for obtaining thin contamination-free samples for TEM examination.

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Self-Assembly Optical Components

MRS Proceedings ◽

10.1557/proc-771-10.10 ◽

2003 ◽

Vol 771 ◽

Cited By ~ 2

Author(s):

Pavel I. Lazarev ◽

Michael V. Paukshto ◽

Elena N. Sidorenko

Keyword(s):

Optical Properties ◽

Self Assembly ◽

Crystalline State ◽

Liquid Crystalline ◽

Film Deposition ◽

X Ray Diffraction ◽

Optical Components ◽

Crystal Film ◽

Solid Film ◽

Thin Crystal

AbstractWe report a new method of Thin Crystal Film deposition. In the present paper we describe the method of crystallization, structure, and optical properties of Bisbenzimidazo[2,1-a:1',2',b']anthra[2,1,9-def:6,5,10-d'e'f']-diisoquinoline-6,9-dion (mixture with cis-isomer) (abbreviated DBI PTCA) sulfonation product. The Thin Crystal Film has a thickness of 200-1000 nm, with anisotropic optical properties such as refraction and absorption indices. X-ray diffraction data evidences a lyotropic liquid crystalline state in liquid phase and crystalline state in solid film. Anisotropic optical properties of the film make it useful in optical devices, e.g. liquid crystal displays.

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