CN112015028A - Camera radiation protection device - Google Patents

Abstract

The invention discloses a radiation protection device for a camera, which comprises a shell with a hollow structure, wherein an incident installation interface is arranged on the right side surface of the shell, and a placing groove for placing the camera is arranged on the left side of the upper end surface of the shell; the bottom of the placing groove is provided with an emergent installation interface; an optical channel is arranged in the inner cavity of the shell; the incident installation interface and the emergent installation interface are respectively communicated with the inlet and the outlet of the light channel; a radiation shielding layer is arranged in an inner cavity between the shell and the light channel and used for shielding radiation rays in the environment and preventing the radiation rays from penetrating through the shell to damage the camera; a reflecting and transmitting lens group is arranged in the light ray channel; the whole optical and radiation shielding system is formed to filter and absorb ionizing radiation rays in light. The observation of a certain section of landscape under a radioactive environment is realized, and the camera can be protected from being damaged by radiation.

Description

A camera radiation protection device

technical field

The present invention relates to the technical field of cameras, in particular to a radiation protection device for cameras.

Background technique

In medical, industrial, and high-energy laboratories, a camera needs to be used to observe objects with radioactive bands or to observe a certain landscape in a radioactive environment; if the camera is directly facing the radioactive source, the camera is easily damaged by radioactive rays.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a radiation protection device for a camera that can effectively filter radiation rays from visible light, so as to solve the problems raised in the above background art.

The technical scheme adopted in the present invention is as follows:

A radiation protection device for a camera, comprising a casing with a hollow structure, characterized in that an incident installation interface is arranged on the right side surface of the casing, a placement slot for placing a camera is arranged on the left side of the upper end surface of the casing; the bottom of the placement slot is arranged An outgoing installation interface is provided; an incident lens and an outgoing lens are respectively arranged on the incident installation interface and the outgoing installation interface; the inner cavity of the casing is provided with a light channel for propagating light; the incident installation interface and the outgoing installation interface are respectively connected with The inlet and the outlet of the light channel are communicated.

The inner cavity between the casing and the light channel is provided with a radiation shielding layer, and the radiation shielding layer is used to shield the ionizing radiation rays in the environment and prevent the radiation rays from penetrating the casing and damaging the electronic, optical, mechanical and other components of the camera.

A reflection and transmission mirror group is arranged in the light channel; the reflection and transmission mirror group is used to refract-reflect visible light in the light from the incident installation interface to the outgoing installation interface and the outgoing lens through the incident lens and the light channel in sequence; The optical and radiation shielding system formed under the combined action of the reflection and transmission mirror groups and the radiation shielding layer realizes the actual required optical imaging, and simultaneously filters and absorbs the ionizing radiation rays in the light.

Preferably, the reflection and transmission mirror group is composed of several visible light reflection and transmission mirrors; the visible light reflection mirror is one of a plane mirror or a total reflection prism.

Preferably, the material of the visible light reflector is a high-refractive-index transparent material or a high-precision reflector.

Preferably, a radiation ray sensor is provided at the light channel of the exit installation interface.

Preferably, the material of the radiation shielding layer is a composite material composed of boron-containing polyethylene, lead, or a combination thereof.

Compared with the prior art, the beneficial effects of the present invention are:

In the invention, a light channel communicating with the incident installation interface and the exit installation interface is arranged in the shell cavity of the hollow structure, and optical reflection and transmission mirror groups are arranged in the light channel; meanwhile, radiation is arranged in the cavity between the shell and the light channel. Shielding layer; the radiation in the environment is effectively shielded by the system, and is refracted-reflected from the incident installation interface through the incident lens, the light channel in turn to the outgoing installation interface and the exit lens, and imaged on the camera sensor; some of the radiation rays penetrate the light After the reflection and transmission lens group of the channel, the labyrinth effect of the refraction-reflection optical path is gradually absorbed, thereby being filtered out, preventing the radiation ray from penetrating the shell; it realizes the observation of a certain landscape in a radioactive environment, and can protect the camera. Not damaged by radiation.

Description of drawings

1 is a schematic structural diagram of a camera radiation protection device of the present invention;

Among them: shell 1, radiation shielding layer 2, reflection and transmission mirror group 3, camera 4, radiation ray sensor 5, incident lens 6, exit lens 7, entrance installation interface 11, placement slot 12, exit installation interface 13, light channel 14 , Mirror 31 .

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "front", "rear", "left", "right", "upper", "lower" and similar expressions are used herein for the purpose of illustration only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Below, in conjunction with accompanying drawing and specific embodiment, the present invention is further described:

As shown in FIG. 1 , a camera radiation protection device includes a casing 1 with a hollow structure. The placement slot 12 of the camera 4; the bottom of the placement slot 12 is provided with an outgoing installation interface 13; an incident lens and an outgoing lens are respectively provided on the incoming installation interface and the outgoing installation interface; The entrance installation interface 11 and the exit installation interface 13 are respectively connected with the entrance and the exit of the light passage 14; the entrance, the exit and the passage of the light passage 14 can be installed with optical lens groups according to actual observation needs.

The inner cavity between the casing 1 and the light channel 14 is provided with a radiation shielding layer 2. The radiation shielding layer 2 is used to shield the radiation rays in the ambient light, and prevent the radiation rays from penetrating the casing and radiating to the external environment and damaging the electronics and optics of the camera. , machinery and other components.

The light channel 14 is provided with a reflection and transmission mirror group 3; the reflection and transmission mirror group 3 is used to refract-reflect the visible light in the light from the incident installation interface 11 through the incident lens 6 and the light channel 14 to the outgoing installation in sequence. On the interface 13 and the exit lens 7, the reflection and transmission lens group 3 realizes the actual required optical imaging, and the entire optical and radiation shielding system realizes the filtering and absorption of ionizing radiation rays in the light.

Further, as shown in FIG. 1 , the reflection and transmission mirror group 3 is composed of several visible light reflection mirrors 31; the visible light reflection mirror 31 is one of a plane mirror or a total reflection prism; the number of the visible light reflection mirrors 31 It is determined according to the radiation intensity of the pipeline channel 14 and the landscape.

Further, as shown in FIG. 1 , the material of the visible light reflector 31 is a high-refractive-index transparent material or a high-precision reflector that has undergone special anti-corrosion treatment.

In this embodiment, if the reflection and transmission mirror group 3 is made of a total reflection prism made of a transparent material with a high refractive index, it has the characteristics of clearer imaging and less loss of light energy, which is suitable for high-definition requirements. Radiation Scenario.

Further, as shown in FIG. 1, the outgoing installation interface 13 is provided with a radiation ray sensor 5 at the light channel 14; the radiation ray sensor 5 is used to detect whether the radiation ray in the light entering the outgoing installation interface 13 exceeds the standard, Only put the camera 4 into the placement slot 12 to observe the radiation situation of the landscape when it is detected that it does not exceed the standard. Otherwise, adjust the composition, geometric size, installation design and other elements of the shielding material until it meets the requirements.

Further, the material of the radiation shielding layer is a composite material composed of boron-containing polyethylene, lead, or a combination thereof.

In this embodiment, the boron-containing polyethylene is formed by using highly pulverized powder boron carbide with a mass ratio of 20%, and then mixing it into polyethylene by physical methods. It has good chemical stability and high temperature resistance, shielding Strong radiation ray ability, shields the radiation ray and prevents the radiation ray from penetrating the casing.

In addition, the specific materials, geometric dimensions, specific design and other factors of the shielding layer 2 are simulated and designed according to the Monte Carlo algorithm (FLUKA, MCNP, etc.) before fabrication for complex situations.

For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all these changes and deformations should fall within the protection scope of the patent claims of the present invention.

Claims (5)

1. A radiation protection device for a camera, comprising a hollow-structured casing, characterized in that the right side surface of the casing is provided with an incident mounting interface, and the left side of the upper end surface of the casing is provided with a placement slot for placing a camera; the placement An outgoing installation interface is arranged at the bottom of the groove; an incident lens and an outgoing lens are respectively arranged on the incoming installation interface and the outgoing installation interface; the inner cavity of the casing is provided with a light channel for propagating light; the incident installation interface and the outgoing installation interface respectively communicate with the entrance and exit of the light channel; The inner cavity between the outer casing and the light channel is provided with a radiation shielding layer, and the radiation shielding layer is used to shield the ionizing radiation rays in the environment and prevent the radiation rays from penetrating the outer casing and damaging the electronic, optical, mechanical and other components of the camera; A transmission lens group is arranged in the light channel; the reflection and transmission lens group is used to refract-reflect visible light in the light from the incident installation interface through the incident lens and the light channel in turn to the outgoing installation interface and the outgoing lens; The optical and radiation shielding system formed by the combined action of the transmission lens group and the radiation shielding layer realizes the optical imaging actually required, and at the same time filters and absorbs the ionizing radiation rays in the light. 2 . A camera radiation protection device according to claim 1 , wherein the reflection and transmission mirror group is composed of several visible light reflection and transmission mirrors; the visible light reflection mirror is a plane mirror or a total reflection prism. 3 . A sort of. 3 . The radiation protection device for a camera according to claim 1 , wherein the material of the visible light reflector is a high-refractive-index transparent material or a high-precision reflector. 4 . 4 . The radiation protection device for a camera according to claim 1 , wherein a radiation ray sensor is disposed at the light channel of the exit installation interface. 5 . 5 . The radiation protection device for a camera according to claim 1 , wherein the material of the radiation shielding layer is a composite material composed of boron-containing polyethylene, lead, or a combination thereof. 6 .

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