SU1223405A1 - Television light-valve projector - Google Patents

Abstract

The invention relates to television. and provides an increase in the contrast of the projected image. The full television signal is fed to the separator 14 fields of the television signal. The signals of even and odd lines are separately fed to the corresponding projection kinescopes 1 and 2. The images from the screens of the projection kinescopes 1 and 2 are projected using appropriate lenses 3 and 7 light-optical light amplifiers (SUS} 8, 9. Each SUS contains a transparent substrate on which a transparent conductive layer 5 layer of the photosemiconductor is sequentially deposited, elastomer and a flexible reflective mirror. The luminous flux from the source 10 of the light through the condenser 11 enters the beam-splitting lens 15. Each part of the luminous flux passes through the respective lenses 5.6 reflected from the flexible reflecting mirror SUS 8, 9 and through the lenses 5, 6 and 5 (L te Signo /) Fig. / J Yu

Description

the beam-splitting prism 15 enters the lens 4. When the flexible reflecting mirrors are not deformed by the elastomer layers, the reflected light flux is focused by the lens 4 on the wide-:

The invention relates to a television technique and can be used to project images onto a large screen.

The purpose of the invention is to increase the contrast of the projected image.

FIG. 1 shows a block diagram of a television light valve projector; in fig. 2 - light valve light amplifier, transverse, section

The television light valve projector contains the first 1 and second 2 projection kinescopes, the first 3, the second 4, the third 5, the fourth 6 and five fifth lenses, the first 8 and the second 9 light valve light amplifiers, the light source 10, the condenser 11, the schlieren-diaphragm 12, the screen 13, the separator 14 of the TV signal fields and the beam-splitting prism 15. Each light valve amplifier 8 and 9 of the light contains a transparent substrate 16 on which a transparent conductive layer 17 is successively applied, a photoconductor layer 18. an elastomer layer 19 and a flexible reflective cast 20.

The device works as follows

The full television signal is fed to the input of the splitter 14, on the first and second outputs of which the signals of even and odd lines are formed respectively. These signals are sent to the first 1 and second 2 projection kinescopes. The images from the screens of the first 1 and second 2 projection kinescopes using the first and fifth lenses 3 and 7, respectively, are projected through the transparent substrates 16 and the transparent conductive layers 17 onto the layers 1B of the photoconductor, respectively the first and second light valve 8 and 9 light amplifiers . Resulting charge

dr afragma 12 “If flexible reflectors; the mirrors are deformed, the luminous flux diffracts, and the reflected light passes by schlieren-diaphragm 15 onto screen 13. 2,

the relief deforms the layer 19 of the elastomer and the flexible reflecting mirror 20 associated with it. The luminous flux from the light source 10 is directed by the condenser 11 to the beam-splitting prism 15, where it is divided into two parts. One part passes through the third lens 5, is reflected from the flexible reflecting mirror 20 of the first light valve amplifier 8 and through the third lens 5 and the beam-distributing prism 13 enters the second lens 4, and the second part passes through the quarter lens 6 to the flexible reflecting mirror 20 of the second light valve the light amplifier 9 and, reflected from it, through the fourth lens 6 and the beam-splitting prism 15 also enters the second lens 4. When the flexible reflecting mirrors 20 are not deformed, the reflected light beam is focused the second lens 4 on the schlieren-diaphragm 12. If the flexible reflecting mirrors 20 are deformed, the luminous flux incident on them diffracts and the reflected light passes by the schlieren-diaphragm 15 onto the screen 13, creating a television image.

Claims (1)

Invention Formula A television light valve projector containing the first light valve light amplifier, the input of which through the first lens is optically connected to the first projection kinescope light source, a condenser and the second lens optically connected, the directional diaphragm and screen, and the third lens optically connected With the output of the first light-amplified light amplifier, which differs from TBMj to increase the contrast of the projected image, the field separator Te31223 is introduced into it. the second projection kinescope, the second light valve-f light amplifier, the fourth and fifth lenses and the beam splitting prism, the first and second faces of which are optically connected to the third and fourth lenses, the third face of the beam splitting prism is connected optically with the second lens, and the fourth facet of the light-10 healing prism through the condenser is optically connected to a light source The fifth lens is located between the second projection kinescope and the second light valve light amplifier, the output of which is optically connected to the fourth lens, the input of the field separator of the television signal is the input of the television signal, and the first and second B1 of the field separator of the field of the television signal are connected to the inputs respectively the first and second projection picture tubes. F1 / g.2