Method for manufacturing a phase plate

• Main Authors: SHUTOU, SHUNSUKE, TSUJIUCHI, NAOKI, MIYATAKE, MINORU, MATSUNAGA, TAKUYA, MIYAZAKI, JUNZOU
• Format: Patent
• Language: Chinese; English
• Published: 16.10.2004
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

The present invention provides a method for manufacturing a thin phase plate with no appearance defects and with high performance. First, as shown in Fig. 1A, a solution of a liquid crystalline compound is applied to a transparent base (1) and dried, or a melted liquid crystalline compound is applied to a transparent base (1), thereby forming a liquid crystalline compound-containing layer (2a). Then, as shown in Fig. 1B, the liquid crystalline compound-containing layer (2a) is turned liquid crystalline or liquefied to be a melted layer (2b). An alignment substrate (3) is brought into contact with the melted layer (2a) to align the liquid crystalline compound in a specific direction. Thereafter, as shown in Fig. 1C, the melted liquid crystalline compound-containing layer (2b) is solidified, and the alignment substrate (3) is removed, thus manufacturing a phase plate (4) composed of a transparent base (1) and an optically anisotropic layer (2c).