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    • 9. 发明授权
    • Lens testing device and testing sheet
    • 镜头测试装置和测试表
    • US06788401B1
    • 2004-09-07
    • US10189601
    • 2002-07-08
    • Masashi KitabayashiKoichi Kojima
    • Masashi KitabayashiKoichi Kojima
    • G01B900
    • G01M11/0264G01M11/0292
    • The present invention provides a lens inspection apparatus and an inspection sheet that make is possible to easily evaluate the resolution of a lens at low cost. A lens inspection apparatus can include an inspection sheet having a test pattern, a sliding holding portion for holding the inspection sheet, a light source for introducing a light beam into the test pattern of the inspection sheet held by the sliding holding portion, a rotary holding portion for holding the sliding holding portion so that the sliding holding portion can rotate in a plane, and a measuring section for capturing an image projected on a screen through the inspection sheet and a projection lens to be inspected, and subjecting the image to image processing. The test pattern has a measuring region in which linear light-shielding portions are arranged in stripes so as to achieve a predetermined spatial frequency. By rotating the rotary holding portion, the resolution of the test pattern, in which the light-shielding portions extend in different directions, can be easily evaluated. Accordingly, the invention makes it possible to simply evaluate the lens resolution at a low cost.
    • 本发明提供一种透镜检查装置和检查片,其能够以低成本容易地评价透镜的分辨率。 透镜检查装置可以包括具有测试图案的检查片,用于保持检查片的滑动保持部,用于将光束引入到由滑动保持部保持的检查片的测试图案中的光源,旋转保持 用于保持滑动保持部分以使得滑动保持部分能够在平面中旋转的部分;以及用于捕获通过检查片投射在屏幕上的图像的测量部分和待检查的投影透镜,并且对图像进行图像处理 。 测试图案具有测量区域,其中线状遮光部分以条纹排列,以达到预定的空间频率。 通过旋转旋转保持部,可以容易地评价遮光部在不同方向上延伸的测试图案的分辨率。 因此,本发明使得可以以低成本简单地评估透镜分辨率。