Acousto-optic ultrafast zoom lens device

Abstract

The invention relates to an acousto-optic ultrafast zoom lens device, and belongs to the laser device field. The device comprises four acousto-optic deflector crystals arranged towards four differentdirections, and radio frequency driving which acts in each acousto-optic deflector crystal, enables an input optical signal to be subjected to Bragg diffraction in the acousto-optic deflector crystalsand realizes zooming by utilizing a corresponding relation between a driving frequency applied to the acousto-optic deflector crystals and an emergent light deflection direction. The device facilitates quick adjustment of the light beam and realizes random movement of the focused light beam. Under the driving of linear chirp, the acousto-optic deflectors generate a transverse sound wave frequencygradient. Light beams are diffracted on the acousto-optic deflector at different angles, the focusing intensity is increased along with the increase of the gradient of frequency chirp, and high-speedand high-precision focusing and orientation of the light beams are achieved. And the crystal is small in size, and the device is simple in structure and easy to integrate.

Description

technical field [0001] The invention relates to an acousto-optic ultrafast variable focus lens device, which belongs to the field of laser devices. Background technique [0002] With the invention of multiphoton microscopy, confocal microscopy provides better axial optical sectioning than traditional wide-field microscopy. Traditional laser scanning microscopes use a pair of orthogonal mirror galvanometer scanners to combine a set of two-dimensional images taken at different axial positions to form a three-dimensional image, but the change in axial position is usually slow. Light-sheet microscopy exhibits good frame capture speeds, but is still insufficient in terms of volumetric imaging rates due to the use of two orthogonal objectives and the fact that the light sheet must penetrate the entire imaging area. The problem with electrically adjustable lenses is that when focusing on the front focal plane of a distant object, spherical aberration occurs. [0003] The acousto-...

AI Technical Summary

Problems solved by technology

Light sheet microscopy exhibits good frame capture speeds but is still insufficient in terms of volumetric imaging rates due to the use of two orthogonal objectives and the fact that the light sheet must penetrate the entire imaging area

The problem with electrically adjustable lenses is that when focusing on the front focal plane of a distant object, spherical aberration occurs

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