Pin cushion

The calculated and experimental emission spectra are shown in Figure 20. The calculated spectrum use the parameters given in Table 2. All four ring-metal modes are included in the calculation. The calculated spectrum reproduces the pin cushion very well. All of the sharp peaks on the cushion are calculated very accurately. The main progression arises from the 333 cm Ru-ring stretch mode. The maximum occurs at the 11th quantum of this mode in both progressions I and II. 

Common Name(s) Crown-Of-Thorns, Step Mother s Pin-Cushion... 

SIT ISIT. Array is flat. Curved formats are not available. Electrostatic focusing causes pin-cushion distortion and a loss of geometric resolution at the detector s edges. 

ISPD. Electrostatic intensification has a maximum distortion (pin-cushion) of approximately 5%. Proximity intensifiers have... 

SIT ISIT. Pin cushion distortion (see above) results in a variation of the modulation transfer function across the target of the detector with a maximum distortion present in the periphery. 

The electrical properties of PPS and the ability to injection-mold very small parts with great precision have led to the use of a variety of connectors, coil forms, etc. in the electronics industry. For example, a pin cushion corrector coil used in color television sets is now being produced... 

As described in Section 3.2 the angle 0 between long molecular axis and the surface normal can be determined from the dichroism of the first absorption band. Good quality films show 0<2O°. This means that the molecules form a pin-cushion type of aggregate. This orientation can be proved indirectly by comparison with the polarized spectra of Lang-muir-Blodgett films discussed below [29,30], where... 

The repeated measurement of the size of indents, and the interpretation of indent geometry for the purposes of calculation, may be tedious, and operator bias is almost unavoidable. The edge of the impression is not always well defined, and misleading edge effects may be associated with anisotropic plasticity or plastic recovery. Faceted and elongated grains, or other microstructural features, together with the limitations of contrast and resolution in the optical microscope, complicate the interpretation, while the shape of the indent may differ in different materials so-called pin-cushion or barreled indents, associated with different constitutive relations and frictional shear on the faces of the indentor in contact with the plastic zone [3]. Mismeasurement of indent size is a major source of scatter in the experimental data and the relative errors in the results of different operators. 

Another PPS success story in the electrical/electronics industry concerns use of PPS in televisions.26 Here requirements included high temperature resistance, precision moldability, good arc tracking resistance, and good dimensional stability. Again, numerous materials were tested, but a fiberglass-reinforced PPS compound proved to be the material of choice for a series of pin cushion corrector coils used in color television sets. 

Polyphenylene sulphide s low dielectric constant and dissipation factor coupled with a high dielectric strength make both the filled and unfilled materials useful in a variety of applications as electrical insulators. It has been successfully employed in the manufacture of connectors, coil bobbins and pin cushion connector coil terminal supports for colour televisions. 

---