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Large format apochromatism F-theta lens

An apochromatic, large-format technology, applied in the field of optical lenses, can solve the problems of blurred images, insufficient efficiency and printing quality, and achieve the effects of small distortion, good processing performance, and high imaging quality.

Active Publication Date: 2016-12-07
苏州七色光智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the focusing mirror moves at a high speed, the inertia of the focusing mirror causes the parts of the focusing mirror to vibrate. This vibration will blur the image printed on the paper. Therefore, the efficiency and printing quality of this one-dimensional movement method for printing large formats are not high enough.

Method used

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  • Large format apochromatism F-theta lens
  • Large format apochromatism F-theta lens
  • Large format apochromatism F-theta lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The first lens 1 is composed of two curved surfaces S1 and S2 with curvature radii of -62.32mm and -68.78mm respectively, the central thickness of which is 13.2mm, the material is SF6, and the focal length is -9398mm;

[0036] The second lens 2 is composed of two curved surfaces S3 and S4 with curvature radii of -716.91mm and -229.26mm respectively, the central thickness of which is 20mm, the material is BK7, and the focal length is 643.2mm;

[0037] The third lens 3 is composed of two curved surfaces S5 and S6 with curvature radii of -152.69mm and -249.13 respectively, the central thickness of which is 14.74mm, the material is SF6, and the focal length is -525.75mm;

[0038] The fourth lens 4 is composed of two curved surfaces S7 and S8 with curvature radii of -2456.1mm and -555.56mm respectively, the central thickness of which is 9.13mm, the material is BK7, and the focal length is 1387mm;

[0039] The fifth lens 5 is composed of two curved surfaces S9 and S10 with cu...

Embodiment 2

[0045]The first lens is composed of two curved surfaces S1 and S2 with curvature radii of -72.7mm and -80.24mm respectively, the central thickness of which is 15.4mm, the material is SF6, and the focal length is -10964mm;

[0046] The second lens is composed of two curved surfaces S3 and S4 with curvature radii of -836.39mm and -267.46mm respectively, the central thickness of which is 23.3mm, the material is BK7, and the focal length is 750.4mm;

[0047] The third lens is composed of two curved surfaces S5 and S6 with curvature radii of -178.14mm and -290.66 respectively, the central thickness of which is 17.2mm, the material is SF6, and the focal length is -613.4mm;

[0048] The fourth lens is composed of two curved surfaces S7 and S8 with curvature radii of -2865.5mm and -648.16mm respectively, the central thickness of which is 10.7mm, the material is BK7, and the focal length is 1618mm;

[0049] The fifth lens is composed of two curved surfaces S9 and S10 with curvature rad...

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Abstract

The invention discloses a large format apochromatism F-theta lens. The large format apochromatism F-theta lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are successively arranged along a light incident direction; the first lens is a meniscus lens having a negative focal length, and a concave surface of the first lens faces an incident light side; the second lens is a positive lens; the third lens is a bending lens having a negative focal length, wherein the concave surface of the bending lens faces the light incident side; the fourth lens is a meniscus lens; and the fifth lens is a meniscus lens having a positive focal length, wherein the concave surface faces the light incident side. The invention provides an achromatism scanning lens group combining multiple materials; the f-theta lens group consisting of 5 lenses performs achromatism processing between RGB three-color light, which improves imaging quality and reduces distortion; and the lens is only made of two kinds of materials and chooses common SF and K kind materials more suitable for optical processing which are cheap in price, good in processing performance and suitable for industrial application.

Description

technical field [0001] The invention relates to an optical lens, in particular to an F-theta optical lens, which is mainly used in a large format RGB three-color light printing system. Background technique [0002] With the continuous development of science and technology, laser application technology has penetrated into the current modern life. For example, laser marking machines are constantly expanding their application range due to their high speed and other advantages. Currently, lasers are expanding their applications in various industries. [0003] In the printing industry, large-format printing needs are often encountered, and its working format can usually reach more than 830mm (A0, A1 drawings). In order to achieve the purpose of large-format printing, the current practice in the industry is: choose an achromatic focusing lens, fix the lens on a one-dimensional moving part with high speed and precise positioning, and when the lens is moving, the roller carries th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B1/04
CPCG02B1/041G02B13/0015G02B13/0045
Inventor 任建锋
Owner 苏州七色光智能科技有限公司
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