Telecentric/inverse-telecentric objective for optical data storage purposes

Gabor Erdei; Gabor Szarvas; Peter Kallo; Emoeke Loerincz

doi:10.1117/12.324546

19 August 1998 Telecentric/inverse-telecentric objective for optical data storage purposes

Gabor Erdei, Gabor Szarvas, Peter Kallo, Emoeke Loerincz

Proceedings Volume 3573, OPTIKA '98: 5th Congress on Modern Optics; (1998) https://doi.org/10.1117/12.324546
Event: OPTIKA '98: Fifth Congress on Modern Optics, 1998, Budapest, Hungary

Abstract

In most optical storage methods data bits are stored in the form of microscopic pixels on the surface of an appropriate storage material. Some currently developed techniques apply parallel data processing by multiple data bit access simultaneously. Such methods require special imaging systems for data recording and retrieval. In our laboratory a page- organized optical memory card reading/writing equipment is under development. According to the basic principle 256 by 256 data bits are processed at the same time, the corresponding pixels are arranged in a 2D array format. The same objective is used to image the selected data page both at writing in and reading out. This objective performs diffraction limited imaging in an extended field, it has low distortion, and it images each pixel of the same value with the same intensity. To achieve all these specifications a telecentric/inverse telecentric imaging system (a special type of afocal systems) offered a suitable solution. This paper describes the advantages of telecentric/inverse telecentric systems in optical imaging by detailed presentation of our objective. The discussion includes specification and design process of the objective together with our test results performed on the fabricated prototype.

Citation Download Citation

Gabor Erdei, Gabor Szarvas, Peter Kallo, and Emoeke Loerincz "Telecentric/inverse-telecentric objective for optical data storage purposes", Proc. SPIE 3573, OPTIKA '98: 5th Congress on Modern Optics, (19 August 1998); https://doi.org/10.1117/12.324546

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