Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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A Study on the Grating Projection Method using Polygon Mirror

회전다면경을 이용한 줄무늬 격자 영사방법에 관한 연구

  • 박윤창 (선문대학교 기계 및 제어공학부) ;
  • 정경민 (선문대학교 기계 및 제어공학부) ;
  • 장석준 (선문대학교 기계공학과 대학원) ;
  • 박경근 (선문대학교 기계공학과 대학원)
  • Published : 2001.06.01
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Abstract

Recently Moire and PMP(Phase Measuring Profilometry) are adopted as a practical methodology for non-contact 3-D measurement of free surface. These methods extract the 3-D informations from the images of the object projected with stripe-pattern light. This paper presents a simple projector generating stripe-pattern light using expensive polygon mirror. In this projector, slit-beam is generated with a Laser diode and a rod lens and the laser diode is switched on/off synchronizing with the rotation of the polygon mirror. So its structure is very simple and light-weighted compared to the existent projection methods using several lenses and it is also easy to change the pitch and the phase of the stripe pattern. Experimental results show that the intensity profile of the stripe pattern can be approximated with sinusoidal curve by reducing the pitch of the stripe pattern.

Keywords

References

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