IMAGE ACQUISITION DEVICE, IMAGE ACQUISITION METHOD AND IRRADIATION DEVICE USING THE SAME

To reduce decreasing of a number of pixels that can detect a terahertz wave in a terahertz wave image acquisition device, and in an image acquisition device using the terahertz wave.SOLUTION: An image acquisition device being an image acquisition device 1001 that acquires an image by using a terahertz wave comprises: a generation unit 112 in which a plurality of generating elements generating a terahertz wave are arranged on an arrangement surface 117; an irradiation optical system 111 image-forming the terahertz wave on an image-formation surface 115; an image-formation optical system 101 image-forming the terahertz wave reflected by a subject; and a sensor 102 including a plurality of pixels. The plurality of generating elements comprise at least a first generating element 113 and a second generating element 114 that are adjacent to each other in the generation unit, and have different irradiation angles relative to a subject, and a beam of a first terahertz wave 156 from the first generating element and a beam of a second terahertz wave 157 from the second generating element have an overlapping area in which they overlap on the image-formation surface.SELECTED DRAWING: Figure 1 【課題】 テラヘルツ波画像取得装置において、テラヘルツ波を用いた画像取得装置において、テラヘルツ波を検出できる画素の減少を低減する。【解決手段】 テラヘルツ波を用いて画像を取得する画像取得装置１００１であって、テラヘルツ波を発生する複数の発生素子が配置面１１７に配置されている発生部１１２と、テラヘルツ波を結像面１１５に結像する照射光学系１１１と、被写体で反射したテラヘルツ波を結像する結像光学系１０１と、複数の画素を含むセンサ１０２と、を有し、複数の発生素子は、発生部において隣り合っており且つ被写体に対する照射角度が異なる第１の発生素子１１３と第２の発生素子１１４とを少なくとも含み、第１の発生素子からの第１のテラヘルツ波１５６のビームと第２の発生素子からの第２のテラヘルツ波１５７のビームとが、結像面において重複する重複領域を有する画像取得装置。【選択図】 図１