F-theta optical lens system

An optical lens and optical technology, applied in the field of optical lens, to achieve the effect of guaranteed cost, easy processing, and large image surface

Inactive Publication Date: 2014-10-01
SUZHOU LIGHTLNS OPTICAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the f-theta lenses currently on the market are designed with a circular aperture, which is difficult to form a consistency with a square aperture

Method used

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Embodiment Construction

[0026] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0027] Such as figure 1 As shown, a kind of f-theta optical lens system of the present invention, from object plane to image plane direction, comprises the lens group that is made up of six lenses, the optical confocal wavelength of described lens group is 532nm and 632.84nm, lens One 1 is a meniscus lens with negative power, lens two 2 is a meniscus lens with positive power, lens three 3 is a meniscus lens with negative power, and lens four 4 is optical focus Lens 5 is a biconvex lens with positive power, lens 6 6 is a biconvex lens with negative power, stop 7 is located at the front of the lens system, between stop 7 and the lens group with intervals.

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Abstract

The invention relates to an f-theta optical lens system which comprises a lens assembly formed by six lenses in the direction from an object plane to an image plane. The optical confocal wave length of the lens assembly is 532 nm and 632.84 nm, the first lens is a meniscus-shaped lens with negative focal power, the second lens is a meniscus-shaped lens with positive focal power, the third lens is a meniscus-shaped lens with negative focal power, the fourth lens is a biconvex lens with positive focal power, the fifth lens is a biconvex lens with positive focal power, the sixth lens is a biconcave lens with negative focal power, a diaphragm is located in the forefront of a lens system, and an interval is reserved between the diaphragm and the lens assembly. According to the f-theta optical lens system, the manufacturability of all the lenses is guaranteed fully, meanwhile, common materials are adopted on lens, the f-theta optical lens system has the advantages of being good in temperature resistance performance, easy to machine and the like, cost of the optical system can be fully saved, the meniscus-shaped lenses are adopted by the first three lenses, light rays of large size can enter the system, and therefore large image plane can be guaranteed.

Description

technical field [0001] The invention relates to an optical lens, in particular to an f-theta optical lens system, which has dual-wavelength achromatism, dual-wavelength confocal, square diaphragm and large image surface. With the development of modern laser and quantum technology, it can be widely used in laser scanning, laser marking, biological self-focusing detection and other fields. Background technique [0002] As an important component of laser scanning systems, f-theta lenses are not only used in single-wavelength laser scanning, but also widely used in dual-wavelength and multi-wavelength scanning systems such as laser color printing and biological sample scanning. However, f-theta lenses currently on the market only have one wavelength, which cannot meet the demand. [0003] In terms of laser scanning, due to the limitation of the size of the equipment, it is difficult to make a breakthrough on the imaging surface. Many manufacturers use multiple lenses to splice ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00
Inventor 吴连平江东明陈艺敏江虹
Owner SUZHOU LIGHTLNS OPTICAL TECH
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