Refracting-reflecting type variable zoom laser expanding and collimating system

A technology of laser beam expansion and refracting, applied in the field of laser beam expansion and collimation system, can solve the problems of difficult to increase the maximum zoom ratio, low efficiency of the beam expansion system, difficult to process the lens, etc., to achieve simple structure, large expansion Beam magnification, the effect of eliminating center occlusion

CN104635343AInactive Publication Date: 2015-05-20HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-05-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a refracting-reflecting type variable zoom laser expanding and collimating system. The laser expanding and collimating system comprises a refracting assembly and a reflecting assembly, wherein the refracting assembly consists of a first plano-convex spherical lens, a second refracting high-order aspheric plano-concave lens and a third plano-convex refracting high-order aspheric lens; the reflecting assembly consists of a fourth off-axis hyperboloid reflector and a fifth off-axis parabolic reflector; a monochrome Gaussian beam emitted by a laser passes through the first plano-convex spherical lens, the second refracting high-order aspheric photo-concave lens and the third plano-convex refracting high-order aspheric lens to finish primary collimating and expanding; parallel light subjected to expanding passes through the fourth off-axis hyperboloid reflector and the fifth off-axis parabolic reflector to finish secondary collimating and expanding. The refracting-reflecting type variable zoom laser expanding and collimating system can provide 6-30 fold continuous variable zoom expanding for a He-Ne laser with the wavelength being 0.6328 micrometer, has the advantages of simple structure, high expanding rate, no central obscuration and no solid convergent focal point, and can be applied to beam expanding of a high power laser.
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Description

technical field

[0001] The invention belongs to the field of optical design and relates to a laser beam expanding collimation system. Background technique

[0002] Traditional laser beam expansion systems are generally divided into refractive laser beam expansion systems and reflective laser beam expansion systems.

[0003] The refractive laser beam expander system mainly includes two forms: one is the Galilean telescope type composed of a positive lens and a negative lens, and the other is a Kepler telescope type composed of two positive lenses. The beam expansion magnification of these two anti-telescopic laser beam expansion systems is related to the apertures of the front and rear lenses. To obtain a large beam expansion magnification, the system must use a larger-diameter lens, and the large-diameter lens is often difficult to process. Therefore, it is difficult to increase the maximum zoom ratio of the general refractive laser beam expander system.

[0004] Reflectiv...

Examples

Embodiment Construction

[0025] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but it is not limited to this. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be covered by the technical solution of the present invention. in the scope of protection.

[0026] Such as Figure 1-4 As shown, the catadioptric variable magnification laser beam expansion and collimation system provided by the present invention is composed of a refraction component and a reflection component, wherein: the refraction component consists of a first plano-convex spherical lens 1, a second refraction high-order aspheric plano-concave lens 2 , the third plano-convex refractive high-order aspheric lens 3; the reflection assembly is composed of the fourth off-axis hyperboloid reflector 4 and the fifth off-axis ...