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Star Patterns Models 07-503 to 07-551 Star X-Ray Test Patterns for Measuring Focal Spot Size Focal spot size can be determined by observing the regions of blurring which occur when the pattern is radiographed by an x-ray source of finite dimensions. Radiation from different areas of the focal spot will cause a periodic blurring of the pattern due to penumbra effects. Knowledge of the geometric factors, and the distance from the center of the pattern to the region where blurring occurs, will permit the calculation of the focal spot size with the same accuracy as measurements made with a pinhole camera. Shown in Model 07-509-2000 Shown in Model 07-510

Available model(s) 07-503-2000 High-Precision Star X-Ray Test Pattern, 55mm ø. For measuring focal spots from 0.1 to 0.3 mm. Has four 15° patterned sectors with a 0.5° angle of a single line within a sector. Lead-foil thickness 0.03 mm 07-503-1000 Ultra-High Precision Star X-Ray Test Pattern. (Same specifications as Model 07-503-2000) 07-509-2000 High-Precision Star X-Ray Test Pattern, 55mm Ø. For measuring focal spots from 1 mm and up. Has four 45° sectors with a 2° angle of a single line within a sector. Lead-foil thickness 0.05 mm 07-509-1000 Ultra-High Precision Star X-Ray Test pattern. (Same specifications as Model 07-509-2000) 07-542-2000 Precision Star X-Ray Test Pattern, 55mm Ø. For measuring focal spots from 0.3 to 0.6 mm. Has four 28 patterned sectors with a 1° angle of a single line within a sector. Lead-foil thickness 0.03 mm 07-542-1000 Ultra-High Precision Star X-Ray Test Pattern. (Same specifications as Model 07-542-2000) 07-543-2000 High-Precision Star X-Ray Test Pattern, 55mm Ø. For measuring focal spots from 0.8 to 1.5 mm. Has four 35° patterned sections with a 1.5° angle of a single line within a sector. Lead-foil thickness 0.03 mm 07-543-1000 Ultra-High Precision Star X-Ray Patterns. (Same specifications as Model 07-543-2000) 07-550 Ultra-High Precision Star X-Ray Patterns. (Same as Model 07-503-2000 except it has four 45° patterned sectors, for easier interpretation). Lead-foil thickness 0.03 mm 07-551 Ultra-High Precision Star X-Ray Pattern. (Same as Model 07-503-2000 except it has four 15° patterned sectors with a 0.25° angle). Lead-foil thickness 0.03 mm 07-510-2000 High-Precision Star X-Ray Test Pattern, 55 mm Ø. For measuring focal spots from 1 mm and up. Has one 360° pattern sector with a 2° angle of a single line within a sector. Lead-foil thickness 0.05 mm 07-510-1000 Ultra-High Precision Star X-Ray Test Pattern. (Same specifications as Model 07-510-2000)

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Supertech ®   President: David B. McNitt   V.P. of Marketing: Judy McNitt-Mell   Asst. to the President: Joy E. Nystrand

Address:   P.O. Box 186   Elkhart, IN 46515 USA   Sales: 800-654-1054   Phone: 574-264-4310   Fax: 574-264-9551

Email: sales@supertechx-ray.com Support: support@supertechx-ray.com