Panoramic microscope with interfering illuminating beams

Valery I. Mandrosov

doi:10.1117/12.336831

19 January 1999 Panoramic microscope with interfering illuminating beams

Valery I. Mandrosov

Proceedings Volume 3568, Optical Biopsies and Microscopic Techniques III; (1999) https://doi.org/10.1117/12.336831
Event: BiOS Europe '98, 1998, Stockholm, Sweden

Abstract

A new panoramic microscope design is offered. An object is illuminated by two interfering laser beams of different close frequency. The angle between the beams and their direction is varied. An energy of scattered light is detected. The detected signal is filtered at the difference frequency at the fixed beam directions and further the image using two-dimensional Fourier transform algorithm of filtered signal is built. The intensity distribution in the image is shown to have a speckled structure, typical of coherent images, with the envelope dependent on the mean slant of the object's roughness and the curvature of its surface. It is also shown that the larger the size of scattered light detecting aperture, the less the effect of the speckled structure on the image quality. Various designs of the microscope are given. The function of the system that uses a thin Fresnel lens as the light source is described in detail. Two illuminating beams move, one continuously and the other discretely, in perpendicular directions along the lens diameter. The imaging of an object with various periodical structure is simulated. The panoramic microscope designs presented in the paper allows the imaging of objects as large as 10 cm located as long as 10 cm away from the light source and the detector with the Rayleigh resolution of about (lambda) /2.

Citation Download Citation

Valery I. Mandrosov "Panoramic microscope with interfering illuminating beams", Proc. SPIE 3568, Optical Biopsies and Microscopic Techniques III, (19 January 1999); https://doi.org/10.1117/12.336831

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