Realization of a High Accuracy Laser Displacement Meter Based on Triangulation

Kanada, Hajime

doi:10.9746/sicetr1965.27.853

Cited by 7 publications

(3 citation statements)

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“…A transmitter (laser diode) projects a light spot onto the target. In order to reduce the influence of measurand surface, the laser is projected perpendicularly [5,6]. The light is reflected off the target and focused via an optical lens system onto a light sensitive device built into the sensor head, called a receiving element.…”

Section: Methodsmentioning

confidence: 99%

A regression model for analysing the non-linearity of laser triangulation probes

Dong

2011

Int J Adv Manuf Technol

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A study on the non-linearity of laser triangulation probes is presented in this paper. The influences of design variables on non-linearity were studied by Response Surface Methodology and the significant factors were identified. A regression model was developed, with which non-linearity can be conveniently evaluated in the design stage of laser triangulation probes. The sensitivities of non-linearity to the design variables are evaluated.

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Section: Methodsmentioning

confidence: 99%

A regression model for analysing the non-linearity of laser triangulation probes

Dong

2011

Int J Adv Manuf Technol

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“…Among them, measurement with a laser displacement meter is considered to be particularly accurate because it can measure the displacement of materials without contact, and no measurement load is applied [29]. However, the conventional semiconductor laser displacement transducer has only one type of light source, and when the object is transparent or specular, not enough reflected light reaches the light receiving part, making it difficult to obtain accurate measurement values [30]. The confocal laser displacement transducer has three light sources and measures only the light of the most focused wavelength at the time of receiving light.…”

Section: Introductionmentioning

confidence: 99%

Polymerization Shrinkage of Short Fiber Reinforced Dental Composite Using a Confocal Laser Analysis

2021

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The purpose of this study was to investigate the polymerization shrinkage of short fiber reinforced composite (SFRC) using a multicolor confocal displacement laser that can measure the polymerization shrinkage with high accuracy. The three types of SFRCs used in this study were XD (Ever X Flow Dentin), XB (Ever X Flow Bulk), and XP (EverX Posterior). In addition, CF (Clearfil majesty ES Flow) with hybrid type filler was used as a control. The measured values of the final polymerization shrinkage rate and amount of polymerization shrinkage rate when the polymerization shrinkage rate became constant (less than 0.1 µm/s) were approximated for all SFRCs. XP had a large aspect ratio of glass fiber filler and showed a significant difference from XD with a small aspect ratio (p < 0.05). There was no significant difference in the measured value of time when the polymerization contraction reached a constant speed (0.1 µm/s or less) for all SFRCs (p > 0.05). There was no significant difference in the measured values of polymerization shrinkage rate after the polymerization shrinkage reached a constant rate for all SFRCs (p > 0.05). These results show that glass fiber with large aspect ratio can alleviate polymerization shrinkage stress. The polymerization behavior of SFRC was found to be dependent on the amount of glass fiber filler, aspect ratio, and orientation.

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“…The systems employed for such purposes are to measure the height of the object by laser reflection [2,3], using cameras or objects moved by actuators to provide focusing [1]. There are also systems that measure vertical displacement by means of contact probes [4].…”

Section: Introductionmentioning

confidence: 99%

Proposal and application of real‐time calibration of baseline length in single‐camera stereo system

Watanabe

Kusano

Fujiwara

et al. 2009

Elect Comm in Japan

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SUMMARY3D image processing algorithms for real-time calibration of the baseline length in a single-camera stereo system are presented in this paper, and the performance of less than 0.03 mm depth measurement in precision and about 0.45 s processing time in the inspection are also presented based on the applications to the experimental equipment. It is technically noted that the baseline of this single-camera stereo system was precisely calibrated by the image processing procedure.The scope of application of this simply configured stereo system could be expanded to the wider fields of industrial 3D measurements.

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Realization of a High Accuracy Laser Displacement Meter Based on Triangulation

Cited by 7 publications

References 0 publications

A regression model for analysing the non-linearity of laser triangulation probes

A regression model for analysing the non-linearity of laser triangulation probes

Polymerization Shrinkage of Short Fiber Reinforced Dental Composite Using a Confocal Laser Analysis

Proposal and application of real‐time calibration of baseline length in single‐camera stereo system

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