A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.

2024年11月7日 · Thorlabs offers resolution test targets with 1951 USAF, NBS 1952, and NBS 1963A patterns. Targets are also available with sector star (also known as Siemens star) patterns, Ronchi rulings, a variable line grating, or a combination of patterns for …

2020年8月14日 · 线对 (Line pairs) 是胶片、镜头等电影摄影领域的专用名词。 每毫米线对一般指 分辨率 的单位，指仪器在一毫米内能分辨出多少对线。 在一定尺度内的可分辨线对数常被用来衡量仪器的空间分辨能力，能分辨的线对数越多，其能分辨每根线的宽度也越小，其分辨 ...

This test target meets requirements as specified in MIL-STD-150A for resolving power tests. The target consists of a series of Elements having two sets of lines at right angles. Each set of lines consists of three lines separated by spaces equal to the line width.

A general formula for the length or width of any target element line can be expressed as the following: Line Length[mm] = Since, Line Width[mm] = Line Length[mm] / 5, the following expression holds:

The 1951 USAF resolution targets are commonly used to determine the limiting resolution of optical devices. The limiting resolution is the highest spatial frequency (density of lines) which can be seen using

The new SilverFast® Resolution Target by LaserSoft Imaging® is a useful tool to get the best actual usable resolution from your scanner as easily as possible. As a second important application, the Target helps you nd the optimum sharpness settings for a chosen resolution.

Standard resolution targets range from Group -2 to Group 7 and Element 1 to Element 6; they can resolve up to 228 lp/mm. High resolution targets range from Group -2 to Group 9 and Element 1 to Element 6; they can resolve up to 645 lp/mm. High resolution targets can resolve much smaller features than their standard resolution counterparts.

This test target meets requirements as specified in MIL-STD-150A for resolving power tests. The target consists of a series of Elements having two sets of lines at right angles. Each set of lines consists of three lines separated by spaces equal to the line width.

Resolution test targets are designed to quantitatively test optical system performance as well as provide length calibration for microscopy. These targets consist of groups of line-space patterns whose spatial frequency increases as the sixth root of two.