CN104950436A - Dmd调制成像系统 - Google Patents

Dmd调制成像系统 Download PDF

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Publication number
CN104950436A
CN104950436A CN201410107738.8A CN201410107738A CN104950436A CN 104950436 A CN104950436 A CN 104950436A CN 201410107738 A CN201410107738 A CN 201410107738A CN 104950436 A CN104950436 A CN 104950436A
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dmd
saturation
imaging
imaging system
zone
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徐熙平
乔杨
刘涛
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0816Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
    • G02B26/0833Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

一种能够有效抑制成像器件饱和区域产生的DMD调制成像系统。本系统是将空间光调制器DMD引入到成像光学系统中,将DMD像元与成像器件的像元形成一一对应关系,当成像器件中出现饱和区域或饱和像素点时,将DMD上对应像素的微反射镜“关”闭,以起到保护成像器件,同时保证所采集图像信息的完整性。

Description

DMD调制成像系统
技术领域
本发明专利涉及一种可避免图像饱和的调制成像系统,尤其是能够保护成像器件并获得清晰图片的调制成像系统。
背景技术
目前,成像系统一般都是由CCD/CMOS成像器件及一个成像镜头所组成,当在强光或有激光干扰的情况下,成像器件会由于入射光光强过强而导致其电压过大超出动态范围,进而产生饱和区域。饱和区域的产生破坏了图像信息的完整性,这在机器视觉、3D测量、监控、行车安全等领域都会带来很多不必要的麻烦甚至是致命的错误。
为弥补现有成像系统不能抑制成像器件饱和区域的不足,本发明专利提出了一种新型的调制成像系统,本系统可以自动对入射光的强度进行调制,进而实现在保证图像信息完整的前提下对成像器件饱和区域的抑制。本系统可广泛应用于机器视觉、3D测量、监控、车载摄像等方面。
发明内容
本发明专利解决其技术问题所采用的技术方案是:在普通的成像系统中引入DMD器件。DMD器件的引入势必要将光学系统分为两个部分,即成像光学系统及中继光学系统。入射光(11),(12)经成像光学系统(21),(22)入射到DMD(30)上,刚开机时,DMD(30)所有微反射镜处于全“开”状态,将入射的光全部反射到中继光学系统(41),中继光学系统将光成像到成像器件(50)上。此时,成像器件(50)将获得的图像显示到计算机(60)上,通过软件分析,当发现获得的图像中出现饱和区域或饱和像素点时,计算机(60)会立即生成一个二值的模版图片(70)给DMD(30),DMD与成像器件之间的像元是一一对应的,DMD根据模版图片做出响应,将处于饱和区域或饱和像素对应的像元调制为“关”状态,当改变调制频率,则可实现灰度调制。如此往复,即可实现对成像器件饱和区域的抑制,保证了图像信息的完整性。
本发明专利的有益效果是,可以有效避免光学成像器件由于饱和区域的产生而影响其使用,另外,也通过饱和区域的抑制保证所获得图像信息的完整。
附图说明
图1是本发明专利的原理图
图1中,11拍摄景物,12干扰激光,21成像光学系统,22TIR棱镜,30DMD,41转像光学系统,50光学成像器件(CCD/CMOS),60计算机,70模片图片,80放大后的图像,81图像中的饱和区域。
具体实施方式
系统上电后,DMD(30)的微反射镜处于全开状态,将入射进调制成像系统中的光反射到成像器件中,入射光经成像光学系统(21,22)及中继光学系统(41)调制后,以及小的畸变量及像差量成像到光学成像器件(50)上。成像光学器件将图像显示在计算机(60)上,利用软件判断,当图像中出现饱和区域或饱和的像素点(81),则计算机会根据饱和区域位置生成一个二值的模版图片(70),并将模版图片(70)发送给DMD(30),令DMD(30)中对应饱和区域的微反射镜“关”上,当该区域的微反射镜“开”、“关”的频率进行改变时,即可实现对饱和区域的灰度调制。如此即实现了对成像器件饱和区域的抑制,使获得的图像信息完整。

Claims (2)

1.一种DMD调制成像系统,由成像系统、DMD、转像系统及成像器件组成,其特征是:可以对入射到系统的光强通过DMD进行调制,将成像器件中饱和区域或饱和像素点对应的DMD微反射镜“关”闭,抑制成像器件饱和区域或饱和像素点的产生。
2.根据权利要求1所述的DMD调制成像系统,其特征是:DMD与成像器件之间的像素是一一对应的。
CN201410107738.8A 2014-03-24 2014-03-24 Dmd调制成像系统 Pending CN104950436A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106680992A (zh) * 2016-11-22 2017-05-17 长春理工大学 基于双dmd的成像系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1703079A (zh) * 2005-04-11 2005-11-30 浙江大学 自适应扩展动态范围的成像方法及其装置
CN101458067A (zh) * 2008-12-31 2009-06-17 苏州大学 激光光斑测量装置及其测量方法
CN102854733A (zh) * 2012-08-06 2013-01-02 深圳市绎立锐光科技开发有限公司 发光装置及相关投影系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1703079A (zh) * 2005-04-11 2005-11-30 浙江大学 自适应扩展动态范围的成像方法及其装置
CN101458067A (zh) * 2008-12-31 2009-06-17 苏州大学 激光光斑测量装置及其测量方法
CN102854733A (zh) * 2012-08-06 2013-01-02 深圳市绎立锐光科技开发有限公司 发光装置及相关投影系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106680992A (zh) * 2016-11-22 2017-05-17 长春理工大学 基于双dmd的成像系统
CN106680992B (zh) * 2016-11-22 2019-03-26 长春理工大学 基于双dmd的成像系统

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