One-chip type f Theta lens of microcomputer electric laser scanning device

A technology of laser scanning device and micro-electromechanical mirror, which is applied in optics, optical components, printing, etc.

Inactive Publication Date: 2009-10-28
E PIN OPTICAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to overcome the defects existing in the existing micro-electro-mechanical laser scanning device, and provide a monolithic fθ lens of a micro-electro-mechanical laser scanning device with a new structure. The technical problem to be solved is to make it consist of a crescent Shaped and concave on the side of the micro-electromechanical mirror, it can correctly image the scanning light reflected by the micro-electromechanical mirror on the target object, and can achieve the linear scanning effect required by the laser scanning device, which is very suitable for practical use.

Method used

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  • One-chip type f Theta lens of microcomputer electric laser scanning device
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  • One-chip type f Theta lens of microcomputer electric laser scanning device

Examples

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Effect test

no. 1 example

[0101] The monolithic fθ eyeglass 13 of the present embodiment is crescent-shaped and the eyeglass of concave surface constitutes at the microelectromechanical mirror side, is aspheric surface at the first optical surface, uses formula (3) to be aspheric surface formula design; The optical surface is an aspheric surface, and formula (2) is used to design the aspheric surface formula. Its optical characteristics and aspheric parameters are shown in Table 1 and Table 2 below.

[0102] Table 1. The fθ optical characteristics of the first embodiment

[0103]

[0104] Table two, the optical surface aspherical parameters of the first embodiment

[0105]

[0106] The optical path diagram of the optical surface of the single-piece fθ lens 13 constituted by this is as follows Figure 5 Shown is the optical path diagram of the first preferred embodiment of the present invention. fX=34.432, fY=431.228 can convert the scanning light into a scanning light point whose distance and ...

no. 2 example

[0110] The monolithic fθ eyeglass 13 of the present embodiment is crescent-shaped and the eyeglass of concave surface constitutes at the microelectromechanical mirror side, is aspheric surface at the first optical surface, uses formula (3) to be aspheric surface formula design; The optical surface is an aspheric surface, and formula (2) is used to design the aspheric surface formula. Its optical characteristics and aspheric parameters are shown in Table 4 and Table 5 below.

[0111] Table four, fθ optical characteristics of the second embodiment

[0112]

[0113] Table five, the optical surface aspherical parameters of the second embodiment

[0114]

[0115] The optical path diagram of the optical surface of the single-piece fθ lens 13 constituted by this is as follows Figure 7 Shown is the light path diagram of the second preferred embodiment of the present invention. fX=34.406, fY=413.661 can convert the scanning light into a scanning light point whose distance and...

no. 3 example

[0119] The monolithic fθ eyeglass 13 of the present embodiment is crescent-shaped and the eyeglass of concave surface constitutes at the microelectromechanical mirror side, is aspheric surface at the first optical surface, uses formula (3) to be aspheric surface formula design; The optical surface is an aspheric surface, and formula (2) is used to design the aspheric surface formula. Its optical properties and aspheric parameters are shown in Table 7 and Table 8 of the facet.

[0120] Table seven, fθ optical characteristics of the third embodiment

[0121]

[0122] Table eight, the optical surface aspherical parameters of the third embodiment

[0123]

[0124] The optical path diagram of the optical surface of the single-piece fθ lens 13 constituted by this is as follows Figure 9 Shown is the optical path diagram of the third preferred embodiment of the present invention. f(1)Y=4831.254, f(2)Y=-559.613 can convert the scanning light into a scanning light point whose ...

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Abstract

The invention relates to a one-chip type f Theta lens of a microcomputer electric laser scanning device, which consists of a crescent-shaped lens with the concave positioned at the side of a microcomputer electric reflector, and is provided with a first optical surface and a second optical surface. The first optical surface and the second optical surface convert scanning beam optical spots in a nonlinear scanning relationship between an angle reflected by the microcomputer electric reflector and time into scanning beam optical spots in a linear scanning relationship between distance and time, and modify and focus the scanning beam on a target object so as to satisfy a specific optical condition and achieve the effect of linear scanning and the purpose of high-resolution scanning.

Description

technical field [0001] The present invention relates to a monolithic fθ lens of a MEMS laser scanning device, in particular to a monolithic fθ mirror that corrects the sinusoidal angular change over time produced by a MEMS reflector in simple harmonic motion. The fθ lens is a monolithic fθ lens of the MEMS laser scanning device to achieve the linear scanning effect required by the laser scanning device. Background technique [0002] At present, the laser scanning device LSU (Laser Scanning Unit) used in the laser beam printer LBP (Laser Beam Print, printer) uses a high-speed rotating polygon mirror to control the scanning action of the laser beam (laser beam scanning). As described in US Pat. The principle is briefly described as follows: use a semiconductor laser to emit a laser beam (laser beam), first pass through a collimator (collimator), and then pass through an aperture (aperture) to form a parallel beam, and the parallel beam passes through a cylindrical mirror (cy...

Claims

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Application Information

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IPC IPC(8): G02B26/10B41J2/47
Inventor 施柏源
Owner E PIN OPTICAL IND
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