F-theta lens and optical system

An optical system and lens technology, applied in the field of optical lenses, can solve the problems of limited scanning range of the lens and difficult aberration correction, and achieve the effect of improving the scannable range, small focusing spot, and expanding the application range.
CN102809804AActive Publication Date: 2012-12-05HANS LASER TECH IND GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HANS LASER TECH IND GRP CO LTD
Publication Date
2012-12-05

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Abstract

The invention provides an F-theta lens and an optical system. The F-theta lens comprises a first lens and a second lens, which are arranged in a light propagation direction in sequence; the first lens is a crescent-shaped negative lens; the second lens is a crescent-shaped positive lens; and curved surfaces of the first lens and the second lens are both bent toward a light incident direction; the incident light wavelength of the lens is 10.6 microns, view field angle 2 omega of the lens is 70 degrees, light incident aperture of the lens is 30 mm, and the scanning range of the lens is 608 mm X 608 mm. The F-theta lens provided by the invention is a large-range field flattening lens, which is designed through double-plate type negative-positive focal power distribution; and on the premise that energy concentration and small focusing spots of a laser are guaranteed, a scannable range can be further enlarged, so that the F-theta lens provided by the invention is beneficial for enlarging the application range of the laser machining industry.
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Description

【Technical field】

[0001] The present invention relates to an optical lens, in particular to a wide-range F-theta lens and an optical system using the optical lens. 【Background technique】

[0002] At present, laser applications have penetrated into all aspects of our modern life, and various application optical systems in order to meet various process requirements are inseparable from laser applications. In the current market, the laser marking machine has gradually replaced various printing machines, screen printing machines, etc. with its fast speed, strong flexibility, no consumables, and permanent marking.

[0003] The F-theta lens is a photographic objective with a large field of view, medium and small apertures, and medium and long focal lengths. The laser galvanometer marking machine is realized because of the F-theta lens. figure 1 It is a typical F-Theta mirror optical system. The light beam passes through two galvanometers 1 and 2 that rotate around the X-axis and...

Claims

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