SU543012A1 - Phase Random Page Builder - Google Patents

Description

one

The invention relates to computing and is intended for use in holographic storage devices (DSS) digital computers.

In the well-known GZU, where light reflectors are used, the random phase mask is made as a separate element 1.

The disadvantages of the known device are the complexity of manufacturing and the presence of a large number of surfaces that increase optical loss (reducing the transmission of light).

To create pages with the reflection of light containing a liquid crystal cell located between the electrodes, one of which is made, like a mosaic, you can combine the random phase mask with the page composer 2.

To diversify the device and increase the light transmission in the proposed composer, the areas of the electrodes corresponding to the elec- tric electric cells are made differently high.

As a result, different phases of light from different parts of the cell are obtained (due to the difference in the optical paths in the liquid crystal).

FIG. Figure 1 shows a section of a lcd crystal with light reflection for the case of matrix electrodes; in fig. 2 is a section along A-A in FIG. 1 for the case of matrix electrodes; in fig. 3 - the same for the case of mosaic electrodes.

The drawings show the reflection electrode 1 - the strip of the matrix electrode X with the races 2 and 3 of the elementary areas, the substrate 4, the transparent conducting electrodes 5 - the strips of the matrix electrodes Y with the transparent Podlonsky 6, the height difference

protrusions of elementary electrodes M, gaskets 7, 8, liquid crystal 9, naduiyip 10 and reflected 11 rays of light.

The drawing shows the angle 0 of the beam as well as the lengths of the 12 matrix electrodes A

(Fig. 2). Here the dotted line on the ivy band shows the conditions) 1st Grains of elementary electric cells.

The mosaic electrodes of the 13 elementary cells for the case of a mosaic of compiled pages are shown in FIG. 3. (Here also, the positions 2 and 3 correspond to different protrusions of the electrodes of the element) of the cells.

Note that the two heights of the steps shown in the drawing correspond to phase 0 °

and 180 elementary light rays. To obtain a light field with many phases of elementary light rays, respectively, the number of different heights of the protrusions of the electrodes must be selected. Nanrnmer, for a light field with phases of elementary lights. N -3

whose Oh, -, l and -l must have four different

heights of reflecting reflective electrodes.

In the proposed method of phase separation between elementary light beams, due to the JIHSHOCTL-IO stroke in a liquid crystal due to the different heights of the protrusions of the OHOHix elementary electrodes, is determined as follows

TO - 2l: l eos0

where n is the indicator of liquid crystal imbalance (, 6-1.8);

K is the wavelength of light in a vacuum.

The implementation of uneven reflective elementary electrodes (metallic: silver, aluminum) is simple. In the case of matrix electrodes, you can initially spray reflective nostril 12 electrodes with protrusions 2 (they correspond to the phase of 180 °), and then with the help of pre-filler A / (

Ht) i masks to look for (karaniphh. And; wedge sections 3 (phase O). In the case of mosaic tiles) with electrode electrodes, each height of the protrusions can be obtained using one of its masks. Marked applies to sharpening}.) 1; high eleigrodov.

0 о рм ул а and 3 о б р е e and п

A random-phase page builder containing a liquid crystal cell located between the electrodes, one of which is made, for example, in the form of a mosaic, characterized in that, in order to increase the intensity of the device, and to increase the light transmission, the areas of the electrodes are differently high.

The sources of information H1, taken into account in the examination:

1. US Patent N 3498690, cl. 350-3.5, published. 1970.

2.Grabmaier J. and. but. “FliJssigkristalle in Anxeige Bildschirmen, Radio Mentor Electronic, 1971, 37, Up to 8, 472-476 (prototype).

1

A-A

3 72

13