Dr. Igor Dunin-Barkowski Profile

Dr. Igor Dunin-Barkowski

CTO at Synapse Imaging Co Ltd

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 12 October 2006 Paper

Accuracy problems in phase shift based 3D machine vision inspection systems

Igor Dunin-Barkowski, Jae-Seon Kim

Proceedings Volume 6382, 63820F (2006) https://doi.org/10.1117/12.685494

KEYWORDS: 3D metrology, Phase shifts, Projection systems, Receivers, Inspection, Imaging systems, 3D vision, Machine vision, Cameras, 3D image processing

Read Abstract +

Booming demand for high speed and high accuracy 3D inspection, especially in the area of manufacturing of electronic devices and components, causes fast progress in research related to this area and significant improvement in these systems capabilities, specification and features. Accuracy can be considered as one of the most important features for 3D machine vision inspection systems, probably along with speed and robustness. Phase shift based systems are believed to be among the most accurate 3D measurement systems with resolution at sub-micron level, though to achieve such a high resolution and accuracy considerable efforts should be made and various physical effects should be taken into consideration. 3D accuracy problems comprise of 2D accuracy problems, such as camera radial and perspective distortions, subpixel measurement problems, etc. combined with special issues related specifically to the phase-shift measurement profilometry. Among them there are distortions of the projected light pattern, including projector radial, perspective distortions and non-sinusoidality of the projected pattern (harmonic distortion) and dynamic range problems caused by camera's signal to noise ratio and by constraints of limited digitized signal bit width. To eliminate or minimize negative influence of the above mentioned factors, a number of measures should be carried out when making 3D measurement head design followed by compensation and calibration procedures. Experimental results on various accuracy problems based on real 3D measurement system developed by authors as well as simulation results are presented in this paper.

Proceedings Article | 6 December 2005 Paper

Influence of the projected grid pattern distortions on measurement accuracy for phase shift based 3D inspection

Igor Dunin-Barkowski, Jae Seon Kim

Proceedings Volume 6051, 60510P (2005) https://doi.org/10.1117/12.648848

KEYWORDS: Inspection, Phase shifts, 3D metrology, 3D image processing, Phase measurement, Manufacturing, Wafer inspection, Projection systems, Semiconducting wafers, Semiconductors

Read Abstract +

Recently 3D inspection tasks become more and more important, especially in electronic manufacturing industry segment in such areas as solder paste inspection, wafer bump inspection, ball grid array (BGA) and leadless packages inspection, pre- and post-reflow surface mount technology (SMT) board inspection and others, number of these tasks is rapidly growing. The main trend in these applications is that sizes of objects that are being inspected are decreasing down to tens of microns thus increasing requirements in measurement accuracy for inspection systems including increasing of both range and lateral resolutions. All these factors form strong demand for 3D measurement methods that could combine high resolution and accuracy with high-speed scan and measurement capabilities. That is why phase shift profilometry methods, based on projection of structured moire-like light pattern on object's surface and measurement of the resultant phase shift, are becoming more and more popular due to their efficiency, precision and robustness. To ensure these method's precision it is necessary to make the projected pattern perfectly sinusoidal and also having predefined grid pitch (period). These parameters are subjects for various distortions due to several factors. Among these factors there are variations of projector's working distance due to changes of objects position, grating distortions, non-sinusoidality of grating's transmission profile, grating pitch variations, etc. Compensation methods for neutralizing the influence of the above mentioned factors are presented in this paper along the experiment results based on 3D measurement head developed by authors for solder paste inspection utilization as well as simulation results.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years