Resolution target

Fig. 33 Two-photon fluorescent images of photosensitive films developed (via 350-nm broadband exposure, 4.4mW/cm ) using an Air Force resolution target mask, a Image recorded by channel 1, b image recorded by channel 2, and c fluorescence intensity by scanning an xy line across one set of three-membered elements (line across set 5)...

Chan and Kazarian were able to achieve a spatial resolution of 3-4 xm with micro ATR FT-IR imaging measurements with a Ge ATR crystal [37]. A recent report by Lasch and Naumann described the lateral resolution of FT-IR imaging measurements in transmission, whereby numerous results from measurements of a resolution target USAF 1951 and tissue samples with different imaging systems from different manufacturers and with different objectives were compared [41]. 

Figure 4 shows the resulting model-calculated CTF, CTF, for the toner fraction 1 along with the CTF computed from experimental data for the same toner. The limiting resolution vr from equation (2) is indicated and agrees quite well ( 15%) with the value from observations of a developed USAF resolution target (2). 

A common way of testing the resolution of imaging systems is by using 1951 USAF resolution targets (see Fig. 5). They consist of horizontal and vertical bars organized in groups and elements. Each group is composed of six elements and each... 

Resolution, Fig. 5 1951 USAF resolution target (Source Edmund Optics 2010)... 

Resolution target, with one line pair indicated. 

Plate la and b shows films posed usii% an Air Force imr e resolution target with images recorded by both channels. The fluorescence intensity profile as a function of position across one set of the elements for each image is shown in Plate Ic. The Im ge differences in fluorescoice intensity in exposed and unexposed r ons can be clearly seen in the graph as wdl as the reverse parity of the images in the two channels, i.e. positive and n ative image formation. 

To fabricate extracellular matrix equivalents with soft sugar (polysaccharide) hydrogels interpenetrated with networks of native extracellular matrix fragments and the synthesis of transplantation modules for higher resolution targeting is now a reality. 

Figure 11 Comparison of a fixed dielectric notch 532-nm passband filter image (A) and 532-nm LCTF image (B) of a USAF 1951 resolution target. 

Figure 7. Visual changes in the in vitro turbid rabbit dura mater and the measured optical changes before and after epidural application of glycerol, (a) Native dura mater placed over the resolution target, bai=lmm. (b) One-minute application of glycerol, bar=lmm. (c) Transmittance spectra for native dura mater measured at application of glycerol for 1, 2, and 10 min [70].

Figure 7.7 Transmission FTIR image of a USAF spatial resolution target (a) without lens (imaging size of 341 pm X 341 pm) and (b) with lens (imaging size of 240 pm x 240 pm). Chan and Kazarian [12]. Reproduced with permission of the American Chemical Society. See color plate section for the color representation of this figure.)...

Figure 14. Photomicrograph of a photoelectrochemical Au deposit on p-GaAs, produced from the projected image of a USAF-1951 resolution target (33)(34). Copyright 1983, The Materials Research Society.

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