Optical system design for crack inspections using magneto-optical imaging

Qingying Hu; Richard Dougherty; Phil Bondurant

doi:10.1117/12.870050

11 November 2010 Optical system design for crack inspections using magneto-optical imaging

Qingying Hu, Richard Dougherty, Phil Bondurant

Proceedings Volume 7855, Optical Metrology and Inspection for Industrial Applications; 78550A (2010) https://doi.org/10.1117/12.870050
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

In general, eddy current sensors are point-based sensors with a very high sensitivity but are very slow because of scanning. Optical visual inspections can be very fast but have difficulty in detection of tiny flaws. Magneto-optical imaging is a hybrid sensing technique that combines the advantages of both the eddy current sensor and the optical visual inspection. It has a very high sensitivity and fast inspection speed up to 100mm per second. This paper discusses the optical system design in a magneto-optical imaging sensor including wavelength selection analysis, image contrast enhancement option, and frame subtraction, etc. Theoretical analysis is given as well as initial testing results.

Citation Download Citation

Qingying Hu, Richard Dougherty, and Phil Bondurant "Optical system design for crack inspections using magneto-optical imaging", Proc. SPIE 7855, Optical Metrology and Inspection for Industrial Applications, 78550A (11 November 2010); https://doi.org/10.1117/12.870050

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