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Galileo type multiple-wave length magnification changeable laser bundle-enlarging collimation system

A laser beam expansion and multi-wavelength technology, applied in optics, optical components, instruments, etc., can solve the problems of large laser divergence angle, high beam expansion magnification, and difficult correction of off-axis images, and achieve simple system structure, small adjustment distance, easy processing effect

Inactive Publication Date: 2009-04-22
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to correct off-axis aberrations, and it is even more difficult for the original laser to have a large divergence angle and high beam expansion magnification.

Method used

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  • Galileo type multiple-wave length magnification changeable laser bundle-enlarging collimation system
  • Galileo type multiple-wave length magnification changeable laser bundle-enlarging collimation system
  • Galileo type multiple-wave length magnification changeable laser bundle-enlarging collimation system

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Embodiment Construction

[0035] The following is based on figure 1 Give a preferred embodiment of the present invention and elaborate:

[0036] The parameters of the incident laser beam: diameter 3mm, divergence angle 5mrad, any single wavelength within the wavelength 250-2300nm. (Due to the different optical materials of the lens, the wavelength range of the expandable collimation is also different)

[0037] The parameters of the outgoing laser beam are required: the beam expansion magnification is M (2≤M≤12), the aperture is 3M, and the divergence angle is 5 / M.

[0038] Taking the 623.8nm laser wavelength as an example, the specific design parameters of the beam expander optical system are shown in Table 1:

[0039] Table 1 Data of zoom beam expander optical system

[0040]

[0041] The distance between d12 and d23 is adjustable. When the variable magnification M is continuously changed between 2 and 12, for the laser wavelength of 0.6328nm, the value range of d12 is 42.50mm-3.50mm, and the va...

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Abstract

The invention discloses a Galilean multi-wavelength vary-power laser expanded beam alignment system which consists of a multifocal group plane convex single lens, a fixed group plano-concave single quadric non-spherical lens and a compensating group plano-concave quadric non-spherical lens. The system can continuously expand the beam of any laser wave length having the divergence angle of emergence within 5mrad at the interval of 250-2300nm by vary-power within 2-12 times, and no real convergent point is available in the system, and the system can be applied to the field of intense laser. When in design, a perfect lens is added behind a compensating mirror, so that the obtained the image of the system proves that the wave aberration PV values at center vision field of laser with any wavelength in the whole wave band are superior to lambada / 50, the PV value of 0.7 vision field is basically superior to lambada / 10, the PV value of 1 vision field is superior to lambada / 4, and the alignment effect of the expanded beam is good. The system has simple structure, easy processing and debugging as well as convenient use.

Description

technical field [0001] The present invention relates to optical elements and optical system design technology, in particular to a Galilean multi-wavelength variable magnification laser beam expansion and collimation system, which is suitable for lasers with real-time adjustable beam expansion magnification for multi-wavelengths and no real convergence point The design of the expanded beam collimation system. Background technique [0002] When a Gaussian beam propagates through free space and transforms through an aberration-free lens, it will always maintain a Gaussian distribution except that the contour scale factor changes. [0003] In the collimation region of the Gaussian beam, the spot size changes slowly, and the spot size increases linearly with the distance away from the beam waist. The smaller the beam waist, the larger the divergence angle of the beam, and the larger the beam waist, the smaller the divergence angle of the beam. Although the beam emitted by the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/16G02B13/18G02B27/09
Inventor 袁立银王建宇
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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