Supercharge Your Innovation With Domain-Expert AI Agents!

Detector Dewar assembly and focal plane detector

A technology of focal plane detectors and detector chips, which is applied in the field of infrared detectors, can solve problems such as the negative impact of noise ratio and noise, and achieve the effect of compact structure and improved shielding effect

Active Publication Date: 2022-03-22
WUHAN GAOXIN TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of technology, the detector system is required to have better and faster infrared detection capabilities, thus putting forward the requirement of rapid cooling start-up for the cooled focal plane detector, which needs to be cooled in place in a short time and stabilize the imaging; however, due to the detection The surface temperature of the external structural parts of the reactor system is much higher than the cooling temperature, and the infrared radiation generated by these external structural parts will form background radiation noise on the focal plane, which will have a great negative impact on the performance-to-noise ratio

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Detector Dewar assembly and focal plane detector
  • Detector Dewar assembly and focal plane detector
  • Detector Dewar assembly and focal plane detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 with figure 2 The embodiment of the present invention provides a Dewar assembly of a detector, including a cold plate 14, a cold finger cylinder 12, a cold shield 11 and a cold shield support 15, the cold shield support 15 is installed on the cold finger cylinder 12, the The cold screen 11 includes a mounting portion 112 and a shielding portion 111, the mounting portion 112 is mounted on the cold screen support 15 and encloses the cold plate 14 inside, and the shielding portion 111 is separated from the mounting portion 112. The free end is extended outward and has a spherical structure.

[0021] Generally, the above-mentioned cold plate 14 has a chip mounting position, which is used for packaging the detector chip 2. The cold plate 14 can efficiently conduct cold energy to the detector chip 2, so that the detector chip 2 can quickly cool down and work stably. The cold plate 14 is installed on the cold finger cylinder 12. Generally, a refrigerator is...

Embodiment 2

[0028] An embodiment of the present invention provides a focal plane detector, including the Dewar assembly of the detector provided in the first embodiment above, and the detector chip 2 is packaged on the cold plate 14 . Apparently, the focal plane detector also includes structures such as a refrigerator, which is a conventional design in the field, and will not be described in detail here.

[0029] In one of the embodiments, the above-mentioned detector chip 2 is directly mounted on the cold plate 14 by glue, which can further increase the cooling speed of the detector chip 2 .

[0030] Further, as figure 1 , the focal plane detector also includes a ceramic substrate 13, the ceramic substrate 13 is installed on the cold shield support 15 and is electrically connected with the detector chip 2, the electrical connection between the ceramic substrate 13 and the detector chip 2 The connection structure is a conventional technique in the art, and will not be described in detail...

Embodiment 3

[0032] An embodiment of the present invention provides a throttling refrigerator, which can be used as the refrigerator in the second embodiment above.

[0033] Such as image 3 , the throttling refrigerator includes a mandrel 31, a cold finger cylinder 12, a flange 33 and a heat exchange tube 32, the heat exchange tube 32 is provided with a throttling part, and the cold finger cylinder 12 is sleeved on the core An expansion chamber is formed outside the shaft 31 and between the mandrel 31, the heat exchange tube 32 is wound on the outer wall of the mandrel 31 and communicates with the expansion chamber through the throttling part. The flange 33 is connected to the cold finger cylinder 12 and closes the expansion chamber, and the flange 33 is provided with an intake passage communicated with the heat exchange tube 32 and an exhaust passage 37 communicated with the expansion chamber . Wherein, the mandrel 31 and the cold finger cylinder 12 are conventional components in the f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a Dewar assembly of a detector, comprising a cold plate, a cold finger cylinder, a cold screen and a cold screen bracket, the cold screen bracket is installed on the cold finger cylinder, and the cold screen includes a mounting part and a shielding part , the installation part is installed on the cold shield bracket and encloses the cold plate inside, and the shield part extends outward from the free end of the installation part and has a spherical structure. In addition, it also relates to a focal plane detector, comprising the above-mentioned Dewar assembly of the detector, and the detector chip is packaged on the cold plate. The invention can effectively improve the shielding effect on external stray light by designing the upper part of the cold shield as a spherical structure; on the premise of realizing rapid cooling and ensuring the normal operation of the detector chip, the structure of the Dewar assembly can be compacted .

Description

technical field [0001] The invention belongs to the technical field of infrared detectors, and in particular relates to a Dewar component of a detector and a focal plane detector using the Dewar component. Background technique [0002] Infrared focal plane detector (IRFPA: Infrared Focal Plane Array) is a new type of detector developed in the 1990s. The infrared focal plane detector integrates infrared radiation detection, signal conversion and signal readout. Its sensitivity High, good environmental adaptability, mature technology, so it has been widely used in military and civilian fields such as aerospace, national defense, industrial and medical imaging. With the development of technology, the detector system is required to have better and faster infrared detection capabilities, thus putting forward the requirement of rapid cooling start-up for the cooled focal plane detector, which needs to be cooled in place in a short time and stabilize the imaging; however, due to th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/02G01J5/061G01J5/10
CPCG01J5/0205G01J5/061G01J5/10
Inventor 洪晓麦沈星王立保李晓永
Owner WUHAN GAOXIN TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com