Specification: 产品名称 Name | 型号 Model | 材料 Material | 外形尺寸 Target Dimen. | 图案组数 Group number | 精度 Precision | USAF1951Resolution slice | CC-008-U-3 | Ceramics | 8*8mm | 2、3、4、5 | 0.0015mm | USAF1951Resolution slice | CG-025-U-0(ON) | Glass | 25*25mm | 0、1、2、3、4、5、6、7 | 0.0010mm | USAF1951Resolution slice | CG-050-U-0(ON) | Glass | 50*50mm | 0、1、2、3、4、5、6、7 | 0.0010mm | USAF1951Resolution slice | CG-076-U-2(ON) | Glass | 76*76mm | -2、-1、0、1、2、3、4、5、6、7 | 0.0010mm |
CG-USAF 1951 Resolution Tablet Group is the group, and Frequency is the number of line pairs per 1mm. Usually used to determine or confirm the performance of the optical system or camera lens resolution. Different grades of lens have the same resolution in the central area, but the surrounding area will be very different.
For high-precision measurement systems, you should try to select a lens that is clearly imaged throughout the entire imaging range. The USAF1951 resolution film can quantitatively evaluate the resolution difference between the center of the lens and the corner area. Using the USAF1951 resolution film, the user can complete the evaluation and selection of lenses of different manufacturers' models. It is also possible to quantitatively evaluate the resolution level of an existing imaging system.
E.g: The two pictures on the right are comparative evaluations of two FA industrial lenses in Japan using the USAF1951 resolution film. (Test environment: The cameras are all 1.3 megapixel CMOS industrial cameras, and the light source is the Flat 50-R-12V background light source from Shenzhen Science & Technology Co., Ltd.). The picture is taken from the top right corner of the picture (320x240). With the A-type lens, it can be seen in the image that the lines of the 4th unit of the 4th group are still separated, the imaging is clear, and the table reads that the resolution is 22.1um. Shooting using the B-type lens, the imaging of the third group of the 6th unit can be seen, and the table shows that the resolution is 35.1um. Explain that the A-type lens is clearer than the resolution of the B-type. |