The manner in which the space to be cooled converters radiant energy/video without the use of special heat transfer, thermoelectric or mechanical cooling devices and device implementing this method

 

The invention relates to a television technique, and it is applied to television systems operating in the IR range. The technical result is providing unlimited service life in space of the device that implements the proposed method. The technical result is achieved that in the proposed method use the opportunity of re-emission into space excess energy accumulated Converter radiant energy/video and use this pereizlucheniya energy for cooling pereizluchateley. 2 C. p. F.-ly, 3 ill.

The invention relates to the field of television, and it applied to television systems operating in the IR range.

In recent years, widespread HgCdTe photodetectors (CdxHg1-xThose) to work in the ranges of 3-5 and 8-12 microns. When there are many positive qualities (high slope conversion, performance, practical absence of inertia) these converters have one major drawback - the need for cooling to temperatures of the order K. The cooling is done using the following methods:

the use of Siegen the basic use (e.g., homing missiles “ground-to-air”);

the use of thermoelectric energy converters (for example, converters peltie). This option is best for reliability, but uneconomical. In addition, achieving temperatures C difficult, because in this case we have to use a multistage thermoelectric device, and with increasing number of stages, the efficiency drops;

the use of cryogenic mechanical systems Stirling. This option allows you to obtain the required temperature, is economical, but has a major drawback - limited lifetime, which limits its use in orbital spacecraft.

The proposed method provides an unlimited lifespan when using a device that implements this method in space. The prerequisites for the use of the proposed method are:

the absence of interfering factors atmosphere in the observation space with a spacecraft that allows you to use the entire spectral range of radiation;

the presence in space of sections with integral low temperature, which allows the use of optical iacoi optical system characteristics “reversibility” (used for example, when film production: the process of photographing the design process of the image).

The essence of the proposed method in the following. For image acquisition, for example, the earth's surface in the wavelength range of 8-14 µm optical system forms the optical image of this surface in the plane of the transducer radiant energy/video. For cooling the Converter the same optical system pereizuchit in the area of outer space, integral temperature which is sufficiently low, the stored energy in the remaining range of the spectrum. To obtain the integral value of the temperature of the used area of space can aberration characteristics of the optical system outside the range of the spectrum to make large enough. In summary we can formulate the proposed method is as follows.

The manner in which the space to be cooled converters radiant energy/video without the use of special heat transfer, thermoelectric or mechanical cooling devices, namely, that for cooling the Converter radiant energy/signal, receiving the flow of energy in a working AI in space in a different spectral range, where the Converter has the minimum sensitivity, and to create this “window” use the same optical system as in the operating range, and to achieve the maximum values of defocus of the object image outside the wavelength range aberration characteristics of the optical system outside the operating range artificially make sub-optimal, and to obtain an image of the space, with a minimum temperature optical system using an additional mirror, transparent in the working range of wavelengths and opaque to the rest of the spectrum, and to search this site using a television camera operating in the near infrared (IR) range of the spectrum.

As a prototype of the proposed device adopted portable camera company “Orion” [1], a fundamental block diagram of which is shown in Fig.3. The prototype consists of an optical system 1, the inverter 2 radiant energy/signal, block 4 video processing and a forced cooling system 3, and the output of the optical system 1 through the inverter 2 radiant energy/signal connected to the unit 4 video processing, and input and output forced the way: generated by the optical system 1 image (in the wavelength range of 8-12 μm) is converted using the Converter 2 radiant energy/video signal in the video signal, which after the necessary processing in the processing unit 4 video output device. As a forced cooling system 3 uses a thermoelectric system, or ISS Stirling. This forced cooling system 3 included in the feedback loop Converter 2 radiant energy/signal and maintains the temperature C in the plane of the working target of the Converter.

In Fig.1 is a block diagram of the device that implements the above method. A device that implements the manner in which the space to be cooled converters radiant energy/video without the use of special heat transfer, thermoelectric or mechanical cooling devices, containing optical system 2, the inverter 3 radiant energy/signal, block 4 video processing, which is optionally introduced television camera 5 middle PC range, block 1 of mirrors comprising a first mirror, transparent in the working range of the spectrum and opaque in the rest of the spectrum, and the second mirror, transparent in the whole range of the spectrum and opaque in the near infrared range and unit 6 unit control mirrors, moreover, the work input ua/video and block 4 video processing is connected to the output of the system, auxiliary input device through the first mirror, the second mirror unit 1 of the mirrors and the optical system 2 is connected to the input of the Converter 3 radiant energy/video, in addition, the auxiliary input device through the first mirror, the second mirror unit 1 mirror is connected to the input of the television camera 5, operating in the near infrared range, and the output of this television camera 5 unit 6 unit control 1 mirror connected with the control input of block 1 of the mirrors.

The device operates as follows:

Radiated radiant energy supplied to the working input device and is supplied to the first mirror block 1 of mirrors through which energy passes only in the working wavelength range (8-14 µm). In Fig.2 shows the spectral reflection characteristics of the first and second mirror unit 1 mirrors. This energy, having a second mirror block 1 of the mirrors and the optical system 2 forms on the working plane of the target transducer 3 radiant energy/video optical image within the working range of wavelengths. Simultaneously with this process on the auxiliary input device receives energy from observed using this input space. Reflected from both mirrors block 1 C (in the near infrared range) of the observed space, and in the remaining part of the spectrum (i.e. the entire spectral range except near IR and range of 8-14 µm) image of the observed space is formed in the working plane of the transducer 3 radiant energy/video. It should be noted that for maximum blur image abroad working range of the aberration characteristics of the optical system 2 abroad working wavelength range artificially made sub-optimal so that the details of the image of the observed section of the space outside of the operating range is practically absent. Thus, the target of the Converter 3 radiant energy/video creates two optical images:

working in the wavelength range of 8-14 microns; an auxiliary - in the remaining range of wavelengths (except for the near IR).

The search space with a low temperature is performed on the image of the television camera 5 in the near-IR range, which is analyzed in the control unit 6 unit mirrors. This block generates a control signal, which changes the orientation of the mirror Assembly 1.

Implementation of the proposed devices on modern element base is not try, and - to increase efficiency and reduce losses - optical system to use the mirror type.

Sources of information

1. Portable imager. Materials state unitary enterprise “NPO "Orion”. http: // www. vimi. EN / goods / g-70-r. htm

Claims

1. The manner in which the space to be cooled converters radiant energy/video without the use of special heat transfer, thermoelectric or mechanical cooling devices, wherein for cooling the Converter radiant energy/signal, receiving the flow of energy in the working spectral range, provide a “window” for the reemission of accumulated unused energy into space outside of the spectral range, where the Converter radiant energy/signal has minimum sensitivity, and to create this “window” use the same optical system as in the working spectral range, moreover, to achieve the maximum values of defocus of the object image outside the spectral range of aberration characteristics of the optical system outside of the work area spectraldomain temperature, optical system using an additional mirror, transparent in the working spectral range and opaque outside of the spectral range, and to search for the space use of a television camera operating in the near infrared (IR) range of the spectrum.

2. A device that implements the manner in which the space to be cooled converters radiant energy/video without the use of special heat transfer, thermoelectric or mechanical cooling devices, containing the optical system, the transmitter of radiant energy/video signal, the video processing module, characterized in that it additionally introduced television camera near-infrared range, the mirror Assembly consisting of a first mirror, transparent in the working range of the spectrum and opaque in the rest of the spectrum, and the second mirror, transparent in the whole range of the spectrum and opaque in the near infrared range, and the block unit control mirrors, moreover, the work input to the device through the first and second mirrors of the mirror Assembly, the optical system, the transmitter of radiant energy/video signal and a video processing module coupled to the output optical whom he is connected with the input of the Converter radiant energy/video in addition, the auxiliary input device through the first mirror, the second mirror of the mirror Assembly is connected to the input of the television camera in the near IR range, and the output of this television camera through the block unit control mirrors connected with the control input of the mirror Assembly.

 

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