摘要:
A sensor/support system includes a sensor assembly having a planar radiation detector lying parallel to a reference plane, a readout circuit, and an interconnect joining the radiation detector to the readout circuit. The system further includes a support structure, the support structure having a platform with a first side to which the sensor assembly is affixed and a second side oppositely disposed from the first side. A shim is affixed to the second side of the platform. The shim is made of a shim material different from the detector material and the platform material. The shim reduces the strain in the interconnect when the temperature of the sensor/support system is changed, as compared with the strain in the interconnect in the absence of the stabilization structure. The shim is selected such that an in-plane strain in the interconnect, measured parallel to the reference plane, during a required thermal excursion is less than a maximum strain difference over the thermal excursion for the interconnect material in low-cycle fatigue for a design number of cycles evaluated over the required thermal excursion.
摘要:
A first Peltier device Pe1 and at least one second Peltier device Pe2 having a current consumption smaller than that of the first Peltier device Pe1 are connected to each other in series, while a bypass circuit B for diverting an excess current I3 with respect to the second Peltier device Pe2 is connected to the second Peltier device Pe2 in parallel, so that a driving current I1 from a current control section A drives the first Peltier device Pe1 at its optimum operating point, and the excess current I3 with respect to the second Peltier device Pe2 in the driving current I1 is diverted into the bypass circuit B, so as to allow the second Peltier device Pe2 to be driven at its optimum operating point as well, where by the cooling efficiency can be improved. Also, the first and second Peltier devices Pe1, Pe2 are stacked on each other, while all the Peltier devices Pe1, Pe2 are driven by the single common current control section A, so as to attain a smaller size.
摘要:
A hermetically sealed optical-semiconductor container in which an optical-semiconductor element is accommodated, comprising a frame 1 made of a metal, an insulating material or a composite material of a metal and an insulating material, a first bottom plate 11 fixed to the frame, and a second bottom plate 12 fixed to opposite surface of the first bottom plate to the frame, either of the first and second bottom plates being made of a metal and having a smaller Young's modulus than the other. For example, the first bottom plate 11 is not less than 25×103 kg/mm2 in Young's modulus, and the second bottom plate 12 is not greater than 15×103 kg/mm2. An optical-semiconductor element, an electronic cooling device and the like are mounted in this container, thus producing an optical-semiconductor module free from degradation of an electronic cooling element nor deviation of an optical axis occurs.
摘要翻译:一种容纳光半导体元件的气密密封光学半导体容器,包括由金属制成的框架1,绝缘材料或金属和绝缘材料的复合材料,固定到框架的第一底板11 以及第一底板12,其固定到第一底板的相对表面与框架,第一和第二底板中的任一个由金属制成,并且具有比另一个更小的杨氏模量。 例如,第一底板11的杨氏模量不小于25×10 3 kg / mm 2,第二底板12不大于15×10 3 kg / mm 2。 光学半导体元件,电子冷却装置等安装在该容器中,由此产生不会降低电子冷却元件的光学半导体模块,也不发生光轴的偏离。
摘要:
An infrared radiation detector device has a cooled detector element (3) within a first optical device (internal cold shield (1.sub.i)). The first optical device includes a first diaphragm (6.sub.i) in front of said detector element. The infrared radiation detector device has a second optical device (external cold shield (1.sub.a)) which is thermally separated from the first optical device. The second optical device includes a second diaphragm (6.sub.a). The aperture (7.sub.a) of the diaphragm forms the pupil of the infrared optic which produces an infrared image on the surface of said detector element (3).
摘要:
In a photoelectric conversion device including peripheral ICs, the peripheral ICs are in thermal contact with a substrate having photoelectric conversion elements and a chassis, which covers the peripheral ICs and has high thermal conductivity, via a thermal conductive member, so as to eliminate adverse influences of heat produced by the peripheral ICs such as a low S/N ratio.
摘要:
An improved X-ray and gamma ray sensitive Vidicon tube having a photoconductor deposited substrate cooled by means of an internal thermoelectric coolers and a heat sink. The cooled photoconductor has a higher resistivity and lower conductivity and hence the device exhibits less dark current.
摘要:
A cooling type infrared rays detecting apparatus is disclosed which prevents a fluctuation of an infrared rays image arising from a variation of the cooling temperature. The infrared rays detecting apparatus includes a dummy element mounted adjacent an infrared rays detecting device on a device mounting portion of an inner tube. The dummy element has a similar structure to that of each of infrared rays detecting elements of the infrared rays detecting device and is formed from the same material as the latter. A temperature variation of the dummy element is detected from a variation in resistance of the dummy element, and an output of the infrared rays detecting device is compensated for in response to the thus detected temperature variation to prevent a possible fluctuation of an infrared rays image arising from a temperature variation. Consequently, an infrared rays image of a high quality can be obtained.
摘要:
The invention relates to an imager for simultaneously obtaining two images of differing color bands of the same object field using a single two dimensional photodetector array. A Fresnel-biprism with two different color filters on the respective left and right aperture halves convergently displaces the two images. An objective lens focuses the filtered convergent images upon a photodector array, the left and right halves of which are covered by a second filter pair. The second pair of filters pass the same color bands as the first pair of filters but the order of the color bands bands is reversed from left to right. As a result of the filtering and convergence, the photodetector array, aligned with its columns parallel to the filter boundaries, responds with its left half to one color image and with its right half to the other color image. The arrangement provides two color band operation without resorting to a second photodetector array, or duplicate read out electronics, and when used in the IR spectrum avoids the need for additional cryogenic apparatus.
摘要:
A cryostatic device is divulged for radiation detectors, disposed at the end of a cooled finger. A case, transparent to the radiation to be detected, at least in the vicinity of the detector, forms about the finger and the detector a heat insulating enclosure. An electric circuit brings the detected signal(s) outside the enclosure and radially immobilizes the end of the finger with respect to said case, because its substrate is a disk fast both with said case and with the end of the finger.
摘要:
A radiation shield 40 is mounted to an uncooled portion, such as an outer case 14, of an IR detector assembly 10 such that it surrounds a thermoelectric cooler 16 and a radiation detector 18. The shield 40 has a curved reflective upper surface 42 having the shape of a toric segment and cylindrical or rectangular reflective sidewalls 44 for imaging the detector 18 and the upper cooler stage upon the tops and sides of lower and slightly warmer cooler stages, which absorb and eliminate radiative energy. This beneficially reduces the heat load upon the coldest stage by excluding hotter surfaces from its view, and by inhibiting reflective couplings of unwanted energy admitted by aperture 46. An aperture 46 defines the effective coldstop for the detector 18.