Larger depth of field for optical imaging methods

J. J. Wang; S. G. Sang; Z. Wang; X. T. Mo; W. Y. Liu

doi:10.1117/12.755193

4 January 2008 Larger depth of field for optical imaging methods

J. J. Wang, S. G. Sang, Z. Wang, X. T. Mo, W. Y. Liu

Proceedings Volume 6837, Information Optics and Photonics Technologies II; 68370V (2008) https://doi.org/10.1117/12.755193
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

The depth of field for optical imaging system is restricted according to its structure parameters. It is obviously when optical microscopy is used, which depth of field is very small and it is lesser with larger amplification ratio. In the paper, three main methods to extend the depth of field will be shown, and their merits and shortcomings will be analyzed. The first method is to use optical mask. It is easy to achieve satisfied results with calculation simulation, but it is difficult to produce this mask if it is complicated. The second method is to use image processing. Many images can be obtained with scanning of imaging system in the direction of depth. Using image processing method, the information of each image will be extracted, then to compose a new image with them. It is a hard work to capture these scanning images. And it is difficult to achieve real time image. The last method is to combine the method of optical mask and image processing. The larger depth of field for optical imaging methods can extend the image range that can be used in the field of optical microscopy and scanning image system.

Citation Download Citation

J. J. Wang, S. G. Sang, Z. Wang, X. T. Mo, and W. Y. Liu "Larger depth of field for optical imaging methods", Proc. SPIE 6837, Information Optics and Photonics Technologies II, 68370V (4 January 2008); https://doi.org/10.1117/12.755193

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KEYWORDS

Image processing

Imaging systems

Optical imaging

Image fusion

Microscopes

Optical microscopy

Digital image processing

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