JPS5837514A - Cooling type photoelectric converter - Google Patents

Abstract

PURPOSE:To reduce the size of a cooling type photoelectric converter by forming a polyhedron on the external circumferential surface of a cooling board on which a photoelectric converting element is arranged and dispersedly arranging elements for processing signals from the photoelectric converting element on respective surfaces of the polyhedron. CONSTITUTION:An airtight vessel having a Dewar construction is constituted by both inner and outer tubes 1, 2 and the space between these inner and outer tubes 1, 2 is kept under vacuum. A cooling board 24 is cooled by an electronic cooler 9 to cool an infrared-ray detecting element 25. The sides of the cooling board 24 are formed like a polyhedron and a signal processing element 26 for reading out and processing signal outputs from the infrared-ray detecting element 25 and a driving element 26' for driving the signal processing element 26 are arranged on each surface of the polyhedron.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling type photoelectric conversion device, and in particular to a cooling type photoelectric conversion device incorporating a multi-element type photoelectric conversion device and a signal processing circuit element.
This invention relates to an improvement of a cooling type photoelectric conversion device having a tube structure.

In general, a cooled photoelectric conversion device consists of an airtight container with a double tube structure consisting of, for example, a power tube and a metal ring made of Koba metal. It has a structure in which a photoelectric conversion element (infrared detection element, etc.) is disposed on the vacuum side tube wall of the inner tube facing the light-transmitting window. Figure 1 shows the structure of such a conventional photoelectric conversion unit. In the figure, 1 is an outer tube, 2 is an inner tube, and these inner and outer tubes 1°2 constitute an airtight container with a dewar structure. Both inner and outer pipes 1
．． The space between the two is kept in vacuum. Reference numeral 8 indicates a light-transmitting window provided outside one end of the outer tube 1, and 4 indicates a cooling base disposed on the inner tube 2 facing the light-transmitting window 8. A photoelectric conversion element, in this example an infrared detection element 6, is fixed on the cooling base 4 via an insulating plate (not shown), and a signal output from the element 5 is connected to a relay terminal board provided on the side of the element 6. External lead-out terminal 8 implanted in the curved outer tube l by the lead wire 7 through the lead wire 6
taken out. Since it is necessary to operate the infrared sensing element 6 at a relatively low temperature, the infrared sensing element 6 is cooled via the cooling base 4 by installing, for example, a Joux M Thomson 5 or an electronic type cooler 9 in the inner tube 2. ing.

By the way, in the 111-component photoelectric conversion device as mentioned above,
A method of arranging a photoelectric converter sA element and a signal processing element etc. together is well known, but for example, a photoelectric converter for infrared detection
When multiple types of elements such as dimensional array elements, signal processing elements, and drive elements for operating the signal processing elements are combined to form a hybrid structure on the same plane, not only the area for these elements increases significantly, but also Due to this, an increase in the size of the device is unavoidable. Furthermore, since the signal processing elements and the like are arranged on the same plane as the dimensional array element for infrared detection, the incident light that enters through the transparent window naturally leaks to elements other than the dimensional array element. There was a risk that the characteristics of the device would deteriorate.

An object of the present invention is to further develop the configuration in which a photoelectric conversion element and a signal processing element are arranged in a hybrid structure in order to solve the above problems, and to provide a photoelectric conversion element consisting of a dimensional play element for infrared detection. The outer circumferential surface of the cooling base is made into a polyhedron, and processing elements for processing signals from the photoelectric conversion element and related elements are distributed on each surface of the polyhedron, thereby reducing the size of the entire device. Cooling type light 1 [This is intended to provide a conversion device.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a 141 cross-sectional view showing one embodiment of the cooling type photoelectric conversion device according to the present invention, and the same parts as in FIG. 1 are given the same reference numerals. The side circumferential surface of the cooling base 24 on which a multi-element type photoelectric conversion element, for example, the infrared TSI known-dimensional play element 26 is disposed, is shaped as a polyhedron, and the upper surface of the cooling base 24 has the above-mentioned -dimensional A signal processing element 26 which arranges the play element 25 via an insulating plate (not shown) and sequentially processes the signal output of the -dimensional array element 25 on each surface of the polyhedron via an insulating plate (not shown), and A hybrid structure in which a drive element 26' etc. for operating the signal processing element is provided, and the -dimensional array element 26, the signal processing element 26, and the drive element 26 are connected by lead wires 27 and combined into a three-dimensional shape. do. FIG. 8 shows a configuration example in which the side peripheral surface of the cooling base 24 is a hexahedron. By using mti in this way, the photoelectric conversion section can be extremely rationally miniaturized, and each element other than the curvature-dimensional array element 26 can be
Since the elements 26 and 26' are arranged on a plane perpendicular to the incident light, leakage of the incident light to each element 26 and 26' can be prevented.

In this embodiment, the side peripheral surface of the cooling base 24 is illustrated as a hexahedron, but the present invention is not limited to this, and may be changed from an octahedron to a 7° octahedron as necessary. Needless to say, there is nothing that can be done in a certain form. In addition to the electrical connection between each element using a single lead wire, the top surface and side circumferential surface of the cooling base are covered with an insulator, and the surface of the insulator is covered with a group 7
Create a lead pattern using the v method or printing method,
Such lead patterns may be used to establish electrical connections between the elements.

As is clear from the above description, according to the configuration of the cooled photoelectric conversion device of the present invention, the photoelectric conversion section includes a one-dimensional array element for infrared detection and a signal processing element having a function of reading signal output from the element. It becomes possible to incorporate a large number of types of elements such as these into a small size. Further, due to the miniaturization, the thermal load is reduced and the cooling efficiency for the above-mentioned one-dimensional array element is improved. Furthermore, each related element other than the one-dimensional array element for infrared detection has the advantage of eliminating the possibility of being affected by the incident light because it is arranged W4a so that it is not directly exposed to the incident light. Alternatively, a multi-element infrared detection device incorporating a two-dimensional play element, a signal processing element, etc. can be made compact and configured with good performance. Therefore, it is extremely advantageous to apply it to a multi-element type photoelectric conversion device that requires cooling.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view illustrating a conventional cooling type photoelectric conversion device, FIG. 2 is a side sectional view showing an embodiment of the cooling type photoelectric conversion device according to the present invention, and FIG. 8 is a side sectional view illustrating a cooling type photoelectric conversion device according to the present invention. FIG. 3 is a perspective view of a main part showing an embodiment of the shape of a cooling base of the type light converting device and the arrangement of each element with respect to the cooling base. In the figure, 1 is an outer tube, 2 is an inner tube, 8 light-transmitting windows, 24 is a cooling base whose side peripheral surface is polyhedral, 26 is a photoelectric conversion element consisting of a -dimensional array element, 26 is a signal processing element, 26'
A indicates a drive element that operates the No. J processing element. Figure 1, Figure 2! Go to Figure 3 - Queen 1: 4 G

Claims (1)

[Claims] A cooling type with a double tube structure, consisting of an outer tube with a light-transmitting window and an inner tube with a photoelectric conversion element arranged opposite to the light-transmitting window, and with a vacuum condition in the space between both the inner and outer tubes. In the photoelectric conversion device, the side circumferential surface of the cooling base of the inner tube on which the J: light distribution electric conversion element is disposed is a polyhedron, and a plurality of types of signals for processing the signal output of the photoelectric conversion element are placed on each surface of the polyhedron. A cooled photoelectric conversion device characterized by having signal processing elements arranged in a distributed manner.