Kinematic couplings: A review of design principles and applications

Slocum, Alexander H.

doi:10.1016/j.ijmachtools.2009.10.006

Cited by 73 publications

(46 citation statements)

References 20 publications

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“…The two interfaces form a high precision kinematic coupling that provides a very good accuracy in positioning of target frames. VCATFS has three high precision cinematic couplings [12,13], the first, L A -F A , between transfer device and target frame, when the target frame is lifted, the second, S G -F A , between the target frame base and goniometer platform, and the third, L A -S A , between the target frame base and horizontal platform.…”

Section: Kinematics Of Vcatfsmentioning

confidence: 99%

Design of Vacuum Compatible Automatic Targets Feeding System

Curuia¹,

Soare²,

Jianu³

et al. 2018

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The present paper presents the design of a vacuum compatible automatic targets feeding system (VCATFS) that can be used to introduce targets inside the interaction chambers for accelerators, laser beams and others research plants. As a first application, the system is to be used within the Extreme Light Infrastructure -Nuclear Physics (ELI-NP) project, to load target frames in the interaction chamber without losing the vacuum. The target frames will be inserted and retracted into/from the interaction chamber individually with high accuracy of positioning. Up to three target frames can be used during one experiment. This number of targets is a consequence of several severe spatial constraints where the system will be installed, but for other situations it can be increased. Also, a new technique of moving the target frames is proposed, two horizontal translations in two parallel planes and two vertical translations also in two parallel planes. VCATFS is divided into two main sub-systems: mechanical (includes kinematics, high precision components and systems, vacuum chamber), and a dedicated command and control system (transducers -high accuracy absolute linear encoders, stepper motors and associated electric drives unit, interfaces and proprietary software). Additionally, a dedicated vacuum system was designed. This approach will further be developed as prototype level. This paper will focus on the design of mechanical sub-system, the remaining ones will be the subject of future documents that would be made publicly available in the future.

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Section: Kinematics Of Vcatfsmentioning

confidence: 99%

Design of Vacuum Compatible Automatic Targets Feeding System

Curuia¹,

Soare²,

Jianu³

et al. 2018

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“…The assembly was supported on an aluminium tooling plate using three tooling balls with a kinematic (3-2-1) mounting configuration [14,15]. This means that one point (at the base of the structure) is fixed and the rest of the structure can move around it.…”

Section: Case Study Examplementioning

confidence: 99%

Thermal compensation for large volume metrology and structures

Yang

Ross-Pinnock

Muelaner

et al. 2017

Int. J. Metrol. Qual. Eng.

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Abstract. Ideally metrology is undertaken in well-defined ambient conditions. However, in the case of the assembly of large aerospace structures, for example, measurement often takes place in large uncontrolled production environments, and this leads to thermal distortion of the measurand. As a result, forms of thermal (and other) compensation are applied to try to produce what the results would have been under ideal conditions. The accuracy obtained from current metrology now means that traditional compensation schemes are no longer useful. The use of finite element analysis is proposed as an improved means for undertaking thermal compensation. This leads to a "hybrid approach" in which the nominal and measured geometry are handled together. The approach is illustrated with a case study example.

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“…Therefore, the kinematic mounting has the advantages of precise positioning, good repeatability, and low deformation of the optical surface and has been widely adopted in the field of precise optics and measuring instruments [11][12][13].…”

Section: Principle Of Kinematic Mountingmentioning

confidence: 99%

Analysis and experiments of the thermal–optical performance for a kinematically mounted lens element

Zhang

et al. 2014

Appl. Opt.

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In order to evaluate the thermal-optical performance of a kinematic mounting applied in lithographic projection lens, the optical surface figure and wavefront changes of the lens element under a certain thermal load are investigated with both experimental and numerical simulation methods. From the experimental and numerical results, the temperature on the edge of the lens element rises up to 22.51°C, and the center of lens is 5.3°C higher. As a result, this thermal nonuniformity leads to a 9.622 nm RMS change of the optical surface figure and 71.905 nm RMS change of the index inhomogeneity, consisting mainly of Z4, Z9, and Z16. Because of the radial flexibility of the supporting legs of the kinematic mounting, aberrations such as pri trefoil and sec trefoil are less than 2% of the total wavefront changes, and other nonaxisymmetric aberrations are negligible. The Zernike coefficient differences between experiments and simulation are less than 2 nm, which supports the correctness of our method. The kinematic mounting shows good thermal adaptability, and the method for evaluation of the thermal-optical characteristics is proved effective.

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Kinematic couplings: A review of design principles and applications

Cited by 73 publications

References 20 publications

Design of Vacuum Compatible Automatic Targets Feeding System

Design of Vacuum Compatible Automatic Targets Feeding System

Thermal compensation for large volume metrology and structures

Analysis and experiments of the thermal–optical performance for a kinematically mounted lens element

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