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Fresnel lens unit sensing device

A technology of Fresnel lens and sensing device, applied in the direction of lens, measuring device, optical element, etc., can solve the problem that it is difficult to take into account the distance between the center area and the edge sensing distance

Active Publication Date: 2021-09-28
BOLY MEDIA COMM SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existing sensing technology is difficult to take into account the distance of the center area and the distance of edge sensing

Method used

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Embodiment Construction

[0023] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the application are not shown or described in the description, this is to avoid the core part of the application being overwhelmed by too many descriptions, and for those skilled in the art, it is necessary to describe these operations in detail Relevant operations are not necessary, and they can fully understand the relevant operations according to the description in the specification and genera...

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Abstract

A Fresnel lens unit sensing device has at least two infrared sensing units and at least two Fresnel lens units. The Fresnel lens unit is at least divided into a first Fresnel lens unit and a second Fresnel lens unit, and the second Fresnel lens unit is located on the side of the first Fresnel lens unit, thereby being able to receive images from different angles. Infrared rays emitted by sensing objects increase the infrared sensing distance and range. The infrared sensing unit is also correspondingly divided into at least a first infrared sensing unit and at least one second infrared sensing unit, the first infrared sensing unit is located at the focal point of the first Fresnel lens unit, and the second infrared sensing unit is located at the corresponding second Fresnel lens unit. the focal point of the Niel lens unit. When the object to be sensed is in different positions, there is always an infrared sensing unit that will obtain a relatively large signal, thereby avoiding the problem of signal attenuation caused by unfavorable angles.

Description

technical field [0001] The present application relates to an infrared sensing device, in particular to a Fresnel lens unit sensing device. Background technique [0002] Infrared Fresnel lens unit sensing system is a common sensing device commonly used in the monitoring field at present, and the size of its sensing range directly affects its application range and use cost. Especially for the outdoor monitoring market, such as hunting monitoring, mine monitoring, open-air construction site monitoring and other applications, a Fresnel lens unit sensing system with a large sensing range is required. The applicant's Chinese patent (named "A Fresnel Lens Unit Sensing System", the announcement number is CN 201984167U), which has been authorized and announced on September 21, 2011, discloses a design of a Fresnel lens unit sensing system , the design uses the method of edge detection instead of interior point detection in a Fresnel lens unit system to increase the detection distanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/08G01J5/02
CPCG01J5/0205G01J5/0215G01J5/0803G01J5/0881G01J1/0411G01J5/0022G02B3/0037G02B3/08G08B13/193
Inventor 胡笑平
Owner BOLY MEDIA COMM SHENZHEN
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