<title>Structured lighting method using moire pattern projection</title>

この論文をさがす

説明

This paper describes a structured lighting method for the measurement of surface profiles of mat objects. In this kind of profilometry, a grating with binary transmittance distribution has been utilized. In these cases such a problem is known that an error is caused due to the non- sinusoidal transmittance of the grating. Another practical difficulty is in mechanical shifting of the grating. Here we propose to use a hybrid grating which consists of a conventional binary grating and a liquid crystal (LC) binary grating. Moire pattern produced by superposing these two binary gratings is available to overcome these problems. When two binary gratings are overlapped, the resultant moire pattern becomes closely sinusoidal in intensity distribution. And, when the LC grating pattern is moved, the projected pattern can be shifted arbitrarily in phase. Surface profiles of some samples are measured to show validity of hybrid grating projection and utility of the prototype system.

収録刊行物

詳細情報 詳細情報について

  • CRID
    1872553968089535872
  • DOI
    10.1117/12.455239
  • ISSN
    0277786X
  • データソース種別
    • OpenAIRE

問題の指摘

ページトップへ