Study on the optical performance and characterization method of texture on KH2PO4 surface processed by single point diamond turning

Chen, Mingjun; Li, Mingquan; Cheng, Jian; Xiao, Yong; Pang, Qilong

doi:10.1016/j.apsusc.2013.04.073

Cited by 47 publications

(24 citation statements)

References 25 publications

(20 reference statements)

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“…In spite of these recent developments, to the best knowledge of the authors, the highest cutting speed achieved at the tip-workpiece interface to date is still less than 1 m/min. This is in contrast to values routinely reached with single point diamond turning (SPDT), where cutting speeds of 10-100 m/min [8,9] and even over 500 m/min [10] are reported. Despite the differences in the type of structures produced by AFM tip-based nanomachining and SPDT as mentioned in [11], it is of interest to compare these two processes as they share similarities in terms of the mechanics of the cutting process at the tool-workpiece interface.…”

Section: Introductioncontrasting

confidence: 88%

AFM tip-based nanomachining with increased cutting speed at the tool-workpiece interface

Geng

Brousseau

Zhao

et al. 2018

Precision Engineering

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This paper reports a study towards enhancing the throughput of the Atomic Force Microscopy (AFM) tip-based nanomachining process by increasing the cutting speed at the interface between the tool and the workpiece. A modified AFM setup was implemented, which combined the fast reciprocating motions of a piezoelectric actuator, on which the workpiece was mounted, and the linear displacement of the AFM stage, which defined the length of produced grooves. The influence of the feed, the feed direction and the cutting speed on the machined depth and on the chip formation was studied in detail when machining poly(methyl methacrylate). A theoretical cutting speed over 5 m/min could be achieved with this setup when the frequency of the piezoelectric actuator reciprocating motions was 40 kHz. This is significantly better than the state of the art for AFM-based nanomachining, which is currently less than 1 m/min.

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Section: Introductioncontrasting

confidence: 88%

AFM tip-based nanomachining with increased cutting speed at the tool-workpiece interface

Geng

Brousseau

Zhao

et al. 2018

Precision Engineering

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“…4 Ultra-precision SPDT equipment [23] properties of a KDP lens, is inevitable when conducting a process that mechanically removes material from a workpiece [32]. The results of Chen et al [33,34] showed that the modulation effect of surface microwaviness and subsurface cracks are the two important mechanisms that damage a KDP crystal. The modulation degrees increase linearly when waviness amplitude and subsurface crack depth increase; the laser-induced damage threshold decreases with increasing amplitude and subsurface crack depth.…”

Section: Single-point Diamond Turning (Spdt)mentioning

confidence: 99%

Research progress on ultra-precision machining technologies for soft-brittle crystal materials

et al. 2017

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Soft-brittle crystal materials are widely used in many fields, especially optics and microelectronics. However, these materials are difficult to machine through traditional machining methods because of their brittle, soft, and anisotropic nature. In this article, the characteristics and machining difficulties of soft-brittle and crystals are presented. Moreover, the latest research progress of novel machining technologies and their applications for softbrittle crystals are introduced by using some representative materials (e.g., potassium dihydrogen phosphate (KDP), cadmium zinc telluride (CZT)) as examples. This article reviews the research progress of soft-brittle crystals processing.

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“…Then the obtained surface roughness reaches nanometer level and LIDT improves. Novel optical polishing techniques are adequately proven and considered state-of-the-art technologies for KDP finishing because the processed elements possess excellent laser damage performance, low subsurface imperfection and high surface quality [ 17 , 18 , 19 , 20 ]. However, the magnetorheological finishing (MRF) [ 21 , 22 ] and water dissolution ultra-precision polishing (WDUP) [ 23 , 24 , 25 ] have been frequently studied recently, for they can remove the single point diamond turning (SPDT) machined marks left on the crystal surface.…”

Section: Introductionmentioning

confidence: 99%

Laser Induced Damage of Potassium Dihydrogen Phosphate (KDP) Optical Crystal Machined by Water Dissolution Ultra-Precision Polishing Method

et al. 2018

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Laser induced damage threshold (LIDT) is an important optical indicator for nonlinear Potassium Dihydrogen Phosphate (KDP) crystal used in high power laser systems. In this study, KDP optical crystals are initially machined with single point diamond turning (SPDT), followed by water dissolution ultra-precision polishing (WDUP) and then tested with 355 nm nanosecond pulsed-lasers. Power spectral density (PSD) analysis shows that WDUP process eliminates the laser-detrimental spatial frequencies band of micro-waviness on SPDT machined surface and consequently decreases its modulation effect on the laser beams. The laser test results show that LIDT of WDUP machined crystal improves and its stability has a significant increase by 72.1% compared with that of SPDT. Moreover, a subsequent ultrasonic assisted solvent cleaning process is suggested to have a positive effect on the laser performance of machined KDP crystal. Damage crater investigation indicates that the damage morphologies exhibit highly thermal explosion features of melted cores and brittle fractures of periphery material, which can be described with the classic thermal explosion model. The comparison result demonstrates that damage mechanisms for SPDT and WDUP machined crystal are the same and WDUP process reveals the real bulk laser resistance of KDP optical crystal by removing the micro-waviness and subsurface damage on SPDT machined surface. This improvement of WDUP method makes the LIDT more accurate and will be beneficial to the laser performance of KDP crystal.

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Study on the optical performance and characterization method of texture on KH2PO4 surface processed by single point diamond turning

Cited by 47 publications

References 25 publications

AFM tip-based nanomachining with increased cutting speed at the tool-workpiece interface

AFM tip-based nanomachining with increased cutting speed at the tool-workpiece interface

Research progress on ultra-precision machining technologies for soft-brittle crystal materials

Laser Induced Damage of Potassium Dihydrogen Phosphate (KDP) Optical Crystal Machined by Water Dissolution Ultra-Precision Polishing Method

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