A shielding structure and shielding method of a photodiode based on laser gyroscope

A photodiode and laser gyroscope technology, applied in the diode field, can solve the problems of being susceptible to external electromagnetic field interference, poor signal quality, etc., and achieve the effects of easy quantification, improved reliability, and simple process

Active Publication Date: 2021-07-20
江西驰宇光电科技发展有限公司
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  • Abstract
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Problems solved by technology

The entire photoelectric signal conversion and transmission process is easily disturbed by external electromagnetic fields, making the converted signal quality poor

Method used

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  • A shielding structure and shielding method of a photodiode based on laser gyroscope
  • A shielding structure and shielding method of a photodiode based on laser gyroscope
  • A shielding structure and shielding method of a photodiode based on laser gyroscope

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Embodiment Construction

[0028] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] Such as Figure 1 to Figure 3 As shown, the present invention provides a shielding structure based on a photodiode used by a laser gyro, including a shielding cap 20, the shielding cap 20 is made of a low-expansion alloy, and the inside of the shielding cap 20 is provided with a photodiode 10; a shielding wire 50, shielding The wire 50 includes a shielded wire inner core 51 and a shielding layer 52, the shielded wire inner core 51 and the shielding layer 52 are respectively welded to the signal end and the ground end of the pin 40 on the photodiode 10; the insulating sealing layer 60 is coated with the insulating sealing layer 60 On the photodiode 10, it is located at the solder joint p...

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Abstract

The invention discloses a shielding structure and a shielding method of a photodiode based on a laser gyroscope, belonging to the field of diodes, including a shielding cap made of a low-expansion alloy material, and a photodiode is arranged inside the shielding cap; shielding wires, shielding The wire includes the inner core of the shielded wire and the shielding layer, and the inner core and the shielding layer of the shielded wire are respectively welded to the signal end and the ground end of the pin on the photodiode; the insulating sealing layer is coated on the photodiode and positioned on the shielding wire The position of the solder joint where the inner core, the shielding layer and the pin are connected; the conductive adhesive layer, the conductive adhesive layer is coated on the insulating sealing layer, and the conductive adhesive layer is in contact with the shielding cap and the shielding layer respectively. It solves the problem that the entire photoelectric signal conversion and transmission process is easily interfered by the external electromagnetic field, which makes the converted signal quality poor; it can avoid the deformation of the shielding cap in the high and low temperature environment and generate stress, thus effectively improving the reliability of the laser gyroscope. sex.

Description

technical field [0001] The present invention relates to the technical field of diodes, in particular to a shielding structure and shielding method of a photodiode based on a laser gyroscope. Background technique [0002] The laser gyroscope is a sensor used to measure the angular velocity of the carrier, and it is one of the commonly used sensor types in modern inertial navigation technology. Its general form is a ring helium-neon laser. The commonly used ring laser resonators are quadrilateral and triangular, etc., and there are three to four corresponding resonator mirrors. Among these mirrors, one or two are output as optical signals. In order to calculate and process the signals, it is necessary to use photodiodes to convert the optical signals into electrical signals that can be recognized and processed by circuits and computers. The electrical signals will be used for laser Stabilization of frequency and counting of sensor rotation angles. [0003] One of the key ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L23/552H01L31/0203G01C19/00
CPCG01C19/00H01L23/552H01L31/0203
Inventor 宋建文黄云黄宗升许光明饶谷音
Owner 江西驰宇光电科技发展有限公司
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