INSPECTION DEVICE AND INSPECTION METHOD
To provide an inspection device and inspection method, which allow for easily inspecting diffraction optical element sheets with high accuracy.SOLUTION: An inspection device 10 provided herein is for inspecting a diffraction optical element sheet 80 comprising multiple unit diffraction optical eleme...
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Zusammenfassung: | To provide an inspection device and inspection method, which allow for easily inspecting diffraction optical element sheets with high accuracy.SOLUTION: An inspection device 10 provided herein is for inspecting a diffraction optical element sheet 80 comprising multiple unit diffraction optical elements 81 arrayed on a sheet surface. The inspection device 10 comprises a holding unit 20 for holding the diffraction optical element sheet 80, a light projection unit 30 configured to project inspection light L onto the diffraction optical element sheet 80 held by the holding unit 20, an image capturing unit 50 for capturing an image of the inspection light L transmitting through the diffraction optical element sheet 80, and a control unit 60 configured to acquire the image of the diffraction optical element sheet 80 from the image capturing unit 50 and inspect each of the unit diffraction optical elements 81 based on the image. The image capturing unit 50 output brightness of each of the unit diffraction optical elements 81, and the control unit 60 corrects a brightness value of each of the unit diffraction optical elements 81 according to a diffraction angle of the inspection light L incident on the unit diffraction optical element 81.SELECTED DRAWING: Figure 3
【課題】回折光学素子シートを簡単、かつ、高い精度で検査できる検査装置及び検査方法を提供する。【解決手段】検査装置10は、シート面内に複数の単位回折光学要素81が配列されている回折光学素子シート80を検査する。検査装置10は、回折光学素子シート80を保持する保持部20と、保持部20に保持された回折光学素子シート80に、検査光Lを投光する投光部30と、回折光学素子シート80を透過した検査光Lを撮影する撮影部50と、撮影部50からの回折光学素子シート80の画像を取得し、画像に基づいて各単位回折光学要素81を検査する制御部60と、を備える。撮影部50は、各単位回折光学要素81の輝度を出力し、制御部60は、各単位回折光学要素81について、当該単位回折光学要素81に入射する検査光Lの回折角に応じて輝度の値を補正する。【選択図】図3 |
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