Topographic inspection of the soft and smooth surface: topographic inspection of the cornea

Liqing He; Songlin Zhuang; Xiangning Li; Mengchao Li; Zijian Zhou

doi:10.1117/12.253098

3 October 1996 Topographic inspection of the soft and smooth surface: topographic inspection of the cornea

Liqing He, Songlin Zhuang, Xiangning Li, Mengchao Li, Zijian Zhou

Proceedings Volume 2899, Automated Optical Inspection for Industry; (1996) https://doi.org/10.1117/12.253098
Event: Photonics China '96, 1996, Beijing, China

Abstract

In this paper, we introduce a new method to inspect the soft and smooth surface, especially the corneal topography. The method is based on the fact that smooth surfaces have the property of reflecting light. Special-shaped gratings are used as projecting device, that is, different grating for different inspected object, according to the topographic condition. For example, a grating with the form of a series of concentric circular rings is good for corneal topography inspection. When the image which contains the topographic information of the object being tested is reflected, it is recorded by a CCD camera. Then the 2D image obtained is processed and calculated by a computer to make out a 3D profile of the surface. This article emphatically reckons a new algorithm which can deduce the corneal topography.

Citation Download Citation

Liqing He, Songlin Zhuang, Xiangning Li, Mengchao Li, and Zijian Zhou "Topographic inspection of the soft and smooth surface: topographic inspection of the cornea", Proc. SPIE 2899, Automated Optical Inspection for Industry, (3 October 1996); https://doi.org/10.1117/12.253098

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