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Focusing system comprising acousto-optic deflectors for focusing an electromagnetic beam

A technology of acousto-optic deflector and focusing system, applied in the field of focusing system

Active Publication Date: 2012-01-25
FEMTONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] It is an object of the present invention to overcome the problems associated with prior art laser scanning microscopes

Method used

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  • Focusing system comprising acousto-optic deflectors for focusing an electromagnetic beam
  • Focusing system comprising acousto-optic deflectors for focusing an electromagnetic beam
  • Focusing system comprising acousto-optic deflectors for focusing an electromagnetic beam

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Embodiment Construction

[0040] Figure 6 is a schematic diagram of the basic principle of beam deflection via a pair of AODs 10 comprising a first AOD 12 and a second AOD 12' having counter-propagating acoustic waves for deflection in the X-Z plane in a known manner. scanning. The lattice constants of the crystals making up the AODs 12 and 12' are slightly modified by the acoustic waves propagating through them so that the AOD crystals act as gratings with modifiable grating constants.

[0041] Accordingly, an incident electromagnetic beam 14 (typically a laser beam) is split by the first AOD 12 into an undeflected zero-order beam 16, a first-order deflected beam 18, and a higher-order deflected beam, which is ignored in the following discussion because typically Only the first-order bundle 18 is of interest. The first order beam 18' deflected (diffracted) by the second AOD 12' will have the same direction as the incident beam 14 and thus the same direction as the zero order beam 16 defle...

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Abstract

The present invention relates to a focusing system (100) for focusing an electromagnetic beam for three-dimensional random access applications, the system comprising a first pair of acousto-optic deflectors (10) for focusing an electromagnetic beam in an X-Z plane, and a second pair of acousto-optic deflectors (20) for focusing an electromagnetic beam in a Y-Z plane being substantially perpendicular to the X-Z plane, characterised in that the second pair of acousto-optic deflectors (20) are arranged between the acousto-optic deflectors (12, 12') of the first pair of acousto-optic deflectors (10), such that the first and fourth acousto-optic deflectors (12, 12") of the system belong to the first pair of acousto-optic deflectors (10) and the second and third acousto-optic deflectors (22, 22") of the system belong to the second pair of acousto-optic deflectors (20).

Description

technical field [0001] The present invention relates to a focusing system for focusing electromagnetic beams in three-dimensional random access applications, said system comprising a first pair of acousto-optic deflectors for focusing electromagnetic beams in the X-Z plane and for The second pair of acousto-optic deflectors focuses the electromagnetic beam in the Y-Z plane. Background technique [0002] Three-dimensional (3D) random access laser scanning technology is very important in performing measurements (including scanning, imaging, detection, excitation, etc.) on biological samples, such as imaging biological structures, or probing for fluorescent labeling of cell surface receptors, or performing such Measurements of uncaging / photosimulation, FRET (Fluorescence resonance energy transfer), FLIM (Fluorescence lifetime imaging), etc. [0003] Commonly used 3D laser scanning microscopes are either confocal or multiphoton (two-photon) microscopes. In confocal microscopy,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/33
CPCG02F1/33G02F2203/28G02F2201/16
Inventor P.A.马克B.罗兹萨G.卡托纳E.S.维齐M.维雷斯A.查卡尼G.萨莱
Owner FEMTONICS
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