3″ x 3″ Negative, USAF 1951 Hi-Resolution Target

Product Details Negative and Positive Patterns On Glass Two Sizes Available Each is Boxed and Includes Resolution Value Chart High Resolution Target Available (down to 645 lp/mm) USAF 1951 Glass Slide Resolution Test Targets are available in either positive (chrome pattern on clear background) or negative (clear pattern on a chrome background). The positive pattern is recommended for the quality control of microscopes and magnifiers. The negative pattern is ideal for collimators and other illuminated test equipment. USAF 1951 Glass Slide Resolution Test Targets are boxed and include a resolution value chart. The targets conform to MIL-S-150A. Specifications General Type: Negative Target Options: High Resolution Physical & Mechanical Properties Dimensions (inches): 3 x 3 Thickness (mm): 1.50 Edges: Beveled Flatness (mm): ≤0.00254 Optical Properties Coating: Vacuum Deposited Durable Chromium Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Float Glass Optical Density OD (Average): ≥3.0 Resolution: Minimum: Group -2, Element 1 Maximum: Group 9, Element 3 Surface Quality: 20-10 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 240: Compliant ×