METHOD OF LARGE-ANGLE HIGH DEFLECTING FREQUENCY LASER BEAM SCANNING SYSTEM FOR TRANSMISSION AND RECEIVING VIDEO- AND OTHER IMAGES AND DEVICE FOR ITS REALIZATION

INVENTION PROFILE

We’d like to provide to interested Companies information about the invention "Method of large-angle high deflecting frequency laser beam scanning system for transmission and receiving video- and other images and device for its realization". Description of the invention, claims and figures see below

 

Industrial application of the invention. Large-angle high deflecting frequency laser beam scanning system (hereinafter - LALS) can be applied to laser video and TV projection, to devices for creation of effect of virtual reality for user, to long range IR security, night vision and navigation systems, long range IR illuminators and IR video cameras, laser show and advertising, display technologies, laser copying, scanning and printing systems and to other laser systems.

 

LALS main technical parameters. Changeable scan angle: 30–180°, resonant (deflecting) frequency: 0.5 – 16.0 kHz and more, small dimensions and weight (see below), simple and low cost architecture, long lifetime – not less than 100 000 hours.

 

TECHNICAL PARAMETERS OF LALS ACTING MODEL SAMPLES

 

The shown LALS parameters are not optimal and could be improved.

LALS with deflecting frequency 16 kHz and scan angle 30⁰

Stage of readiness of technology to industrial implementation. There is acting model of large-angle high deflecting frequency scanner of laser beam. The scanner allows making line and framing scanning of laser beam in horizontal and vertical direction. Demonstration of LALS acting model, which deflects laser beam in horizontal and vertical direction, could be presented at request.

 

 

Evidences of reality of the invention are shown on.

 

Legal protection of the invention. There is the RU patent on the invention No. 2330316 (priority date is October 17, 2006, published March 2007). Patent holders are two individuals.

 

Proposals. We’ll consider outright sale of the invention.

 

Contacts. Vitaly Pilkin, tel. +7 985 222-5545 (Moscow, Russia), E-mail: info@vcpartners.biz   

 

NOTE. All Information is presented under the conditions that (a) nothing disclosed by us will create any obligation or restriction on Companies or their subsidiaries or affiliates (including an obligation of confidentiality); (b) everybody is free to use or not to use information about the invention without any compensation, subject to any rights patent holders have acquired based on the RU patent No.2330316 issued by the Russian Patent Office.

 

 

EXAMPLES OF PRACTICAL APPLICATION OF LALS-BASED DEVICES

 

1. The LALS-based color TV projector

New method of large-angle high deflecting laser beam scanning system (LALS-based) allows introducing laser digital TV projectors on market now. Power of RGB (red, green, blue) laser is about 300 mW (blue - 100 mW, red - 100 mW, green - 100 mW). Convergence of three colors in one white unit excludes convergence on screen. Brightness of light point on screen is established by duration of light pulse. Synchronous control of three colors allows obtaining very simple image on screen from digital video signal. Laser TV projector will excel plasma TV by image quality.

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 1. Scheme LALS-based TV projector (scale is not observed for good layout)

 

1.      RGB solid laser; 2. System of color mixing (blue, red, green) in one white beam; 3. Unit of horizontal scanning, 16 ... 20 kHz and more; 4. Unit of frame scanning, 25 ... 100 Hz; 5. Screen; 6. Digital control unit of switching beams of three-color laser from video signal and synchronization of video signal with horizontal and frame scanning.

 

New method of large-angle high deflecting laser beam scanning system allows to start manufacturing home theatres with screen size tens times and more larger than existing TV sets. In opposite to public cinema home theatre needs no darkening.

 

Main advantages of LALS-based color TV projector:

w Higher image quality in comparison with all TV systems produced;

w Simplicity of laser TV projector and that’s why lower cost in comparison with all acting models of laser TV projectors.

 

2. LALS-based device for creation of three-dimensional color virtual video image and creation of effect of virtual reality for user (Fig.2).

New method of large-angle high deflecting laser beam scanning system (LALS-based) allows introducing device for creation of three-dimensional color virtual video image and creation of effect of virtual reality for user by the use of binocular scanner (two ocular scanners). For the first time a user of video device will have possibility to "penetrate" into virtual three-dimensional space and have an illusion of participation in virtual events. The effect of virtual reality for user considerably exceeds illusion of three-dimensional effect of holography. The invention is intended for viewing different video images, including video movies, TV program, computer games and programs, in the mode of virtual reality.  The specific participation effect is achieved for computer games, when a player has the complete illusion of direct participation in real game. Application of the invention in simulators for training of drivers, pilots and other specialists will create the complete illusion of reality and will accelerate the process of training. The invention could be applied as an instrument of night vision in infrared, ultraviolet and other ranges of electromagnetic radiation. The invention could replace display of computer and TV set. It is designed in form of binocular scanner, and being put on head of a user it connects him with a virtual space. Realization of the offered technical solution allows creating an illusion of penetration in virtual space by forming 3D color virtual video image directly on retina by method of line and frame scanning by beam of white light (mixture of red, green and blue colors). Scanning is executed by two ocular scanners fixed on helmet on head of a user.

 

 

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Figure 2 shows the binocular scanner for viewing of hockey match in the mode of virtual reality. The user sees the three-dimensional image of the hockey match, as if he really sits on viewing stand or is the participant of the play.

 

 

 3. LALS-based long range IR illuminators.

For construction of long range IR illuminator it is necessary to have only laser with invisible infrared beam and LALS. Such IR illuminator illuminates effectively sector at distance up to 1 km and more (depending on IR-laser power). As a result video camera with high definition can control in complete darkness 90° sector at distance up to 1 km and more. LALS-based long range IR illuminators have serious advantages in comparison with most powerful IR illuminators, effective illumination of which not exceed of 125 meters. So, LALS-based long range IR illuminators can be applied to security and night navigation systems to illuminate images from video camera with high definition.

 

4.  Laser security system unit with large-angle high deflecting frequency scanner of laser beam in infrared range (LALS-based IR-laser security system) for control of and signaling about dangerous movements within 1 km (and more) controlled area (fig. 3).

For construction of laser security system unit it is necessary to have laser with invisible infrared beam and LALS, only one photodiode with amplifier and simplest analog-to-digital converter (ADC) of serial code. This considerably decreases the cost of a laser security system unit, which can operate both in daylight and in complete darkness and does not require video camera with high definition with additional illumination. 

The mentioned unit shall be installed on a tower and could control in complete darkness 90° sector at distance up to 1 km and more (depending on IR-laser power). The digital memory unit records the initial image (long shot) of the controlled sector, and the comparator automatically compares the initial image with current condition of the controlled sector in real time. Any appearance of new object within the controlled zone automatically generates emergency signal on control console. Simultaneously the image could be displayed on monitor. Installation of 4 systems with 90° control sector provides all-round control of an object.

           

 

 

 

Fig. 3.  LALS-based IR-laser security system unit for control of and signaling about dangerous movements within 1 km controlled area (shown in white).

 

 

 5. The LALS-based IR-laser security system unit for control of and signaling about dangerous movements within 1 km controlled perimeter (fig. 4).

For safeguarding of a zone perimeter it is enough to install two towers with the laser security systems unit for control and signaling. Operational distance is 1 km and more (depending on IR-laser power). The system operates both in daylight and in complete darkness and does not require additional illumination.

This security system could be very effective for protection of the national boundary and other important state, industrial and commercial objects.

 

 

Fig. 4. LALS-based IR-laser security system unit for control of and signaling about dangerous movements within 1 km controlled perimeter (shown in white) of protected zone.

 

    

 

 6. Mobile and stationary LALS-based IR-laser long range night vision units.

The mentioned systems are characterized by high quality of video image in conditions of limited visibility and complete darkness, operational distance up to 1 km and more (depending on IR-laser power), possibility of record and storing video images, small dimensions for mobile systems, simplicity of design and low cost. The image could be shown both on display and on operator’s goggles.

Fig. 5 shows the essentially new LALS-based IR-laser nigh vision system. This night vision unit operates as follows. The laser beam 1 is scanned by large-angle high deflecting frequency scanner system (LALS) 2, observing area within the controlled sector. Reflected signal is received by the photodiode 3, amplified and converted into digital video signal, which is displayed on LCD monitor 4. Obtained image is transmitted to the human eye through the lens 5 and eyepiece 6.

Compact and cheap IR lasers with cheap LALS system will allow to produce cheapest night vision units with cost ten times lower than existing night vision devices.

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 5.  Scheme and outer appearance of LALS-based IR-laser long range night vision unit

1 – IR laser; 2 – large-angle high deflecting frequency laser beam scanner system (LALS); 3 – IR radiation (photodiode) receiver; 4 – LCD monitor; 5 – lens; 6 – eyepiece.

 

 

 

Fig. 6. LALS-based IR-laser long range night vision unit area video control

 

 The LALS-based IR-laser night vision init shall be put on head (or kept in hands) to provide video control of area at distance up to 1 km (or more) depending on power of IR laser. Scanning of area could be provided by external more powerful IR laser, which could provide operation of large group of night vision units only for receiving. Video signal from each watcher could be transmitted to the central console for additional control of sector and watcher.

 

7.  the LALS-based IR-laser long range night navigation systems for land, see and airborne transports.

     Device for large-angle high deflecting frequency laser beam scanning at last allows beginning development of high effective and cheap infrared radars-scanners for control and safety ensuring for participants of traffic and prevention of cars, trains, ships and aircraft collisions in conditions of low visibility or complete darkness.

     Wide angle and high speed of scanning of space in direction of movement of vehicle allows controlling all participants of traffic. Video signal processing from IR-laser radar-scanner allows to calculate number of objects moving (and immovable) in any directions, their velocity, dimensions, direction of movement and point of possible collision in case of disturbance of order in motion of vehicles.

     In case of disturbance of order in motion of vehicles and rise of critical situation, which could result in collision, the emergency braking system or the system of turning in safety direction will be actuated. Naturally, reaction time and speed of actuation of electronic devices are much faster than human ones, when fractions of a second are important. Perspective of application of high speed IR-laser radar-scanners for transport is shown in figures.

 

 

 

 

 

 

Fig. 7. Car (bus, truck)-based IR-laser long range radar-scanner with effective control distance more than 1 km for control of participants of road traffic, especially in nighttime. Additional control of roadside also allows not descending down from road.

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 8.  Advantage of IR-laser long range radar-scanner for railway transport is the effective control distance more than 1 km. It is enough to actuate manual or automatic emergency braking and to prevent collision.

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 9. Ship-based IR-laser long range radar-scanner with effective control distance more than 1 km

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 10. Aircraft (helicopter)-based IR-laser radar-scanner with effective control distance more than 10 km

 

 

 

 

Advantages of IR-laser long range radar-scanners

·         Effective control distance more than 1 km;

·         large angle and high deflecting frequency scanning of space in direction of movement of vehicle;

·         High (television) quality of image;

·         Visualization of image in any conditions of illumination, even in complete darkness;

·         Low cost and simple architecture of the LALS;

·         No analog in the world.