Abstract: A rigid vinyl chloride injection screw which kneads and injects rigid vinyl chloride includes a flight and a groove. L/D is set to be 19.1 where L is an effective screw length and D is a diameter of the injection screw. tf/tm is set to be 2.5 where tf is the width of the flight at a supply portion and tm is the width of the flight at a measure portion. hf/hm is set to be 2.1 where hf is the depth of the groove at the supply portion and hm is the depth of the groove at the measure portion. A compression ratio that is calculated from ((P?tf)×hf)/((P?tm)×hm) is set to be 1.74 where P is a pitch of the injection screw.

Abstract: A floating type DC-DC converter for remote power feeding is connected via a power separating filter to a signal line on which an AC signal is superimposed on DC power. The DC power separated by the power separating filter is stored in an input capacitor and is supplied by a switching operation of a switching element to the primary winding of a transformer and AC power induced in its secondary winding is supplied to an output capacitor after being rectified by a rectifying element. An electrostatic shield layer is interposed between the primary and secondary windings of the transformer and is connected to the capacitor connected to one of the primary and secondary windings.

Abstract: A phase shifter for adding a deterministic phase to an original information to be recorded in hologram. The phase shifter consists of a number of unit cells arranged in a matrix. A set of the unit cells are provided which will cause a certain phase shift to a light passing through each kind of the unit cells so as to distribute the light irradiance of the original information more evenly over the Fourier transformed plane. The invention suggests a solution to make the phase shifter with the unit cells arranged by the deterministic phase distribution.