Measurement of partially specular objects by controlling imaging range

Joongki Jeong; Deokhwa Hong; Hyungsuck Cho

doi:10.1117/12.754548

8 October 2007 Measurement of partially specular objects by controlling imaging range

Joongki Jeong, Deokhwa Hong, Hyungsuck Cho

Proceedings Volume 6718, Optomechatronic Computer-Vision Systems II; 671808 (2007) https://doi.org/10.1117/12.754548
Event: International Symposium on Optomechatronic Technologies, 2007, Lausanne, Switzerland

Abstract

When specular surface is imaged on a group of CCD cells, the image usually suffers from saturation and blooming problem. This problem is a serious obstacle to applying optical profiling methods based on structured light to specular objects. In this paper, a phase-based profiling system combined with a spatial light modulator in the imaging part is proposed to measure three dimensional shape of partially specular surfaces. The spatial light modulator prevents the image sensor from being saturated. In this way, projected fringes are well imaged and their phase information is correctly extracted. The system configuration and transmittance control scheme are explained in sequence. This idea is verified by experimental results, in which phase information is successfully extracted from the areas which are not normally measurable due to saturation.

Citation Download Citation

Joongki Jeong, Deokhwa Hong, and Hyungsuck Cho "Measurement of partially specular objects by controlling imaging range", Proc. SPIE 6718, Optomechatronic Computer-Vision Systems II, 671808 (8 October 2007); https://doi.org/10.1117/12.754548

ACCESS THE FULL ARTICLE

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