The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We have proposed a novel principle for design of the binary Gabor zone plate (GZP) that can produce the desired focal-plane curves. The modified GZP can be fabricated as easily as the Fresnel zone plate (FZP). The proposed GZP has great flexibility in terms of manipulating the focusing properties. Optical experiments have confirmed the reliability of the GZP in focusing light into the specified area...
A self-focusing matched filter is proposed in this paper. The filter function is constructed by adding a quadratic phase factor to the conjugate Fourier spectrum of an object to be recognized. The filter is recorded by using computer-generated holographic techniques. Because of the property of self-focusing, the optical path of the recognition system becomes much simpler and is convenient to adjust...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.