Ray beam guiding device and ray inspection apparatus having the same

Patent metadata

Field	Value
Publication number	US-10446288-B2
Application number	US-201615578138-A
Country	US
Kind code	B2
Filing date	Jul 12, 2016
Priority date	Nov 6, 2015
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

The present invention provides a ray beam guiding device for guiding a ray beam in a ray inspection apparatus. The ray beam guiding device is provided in a housing of the ray inspection apparatus, and two ends of the ray beam guiding device are connected to a front collimator and a rear collimator, respectively. The ray beam guiding device comprises a plurality of guiding walls and a guiding cavity surrounded by the guiding walls. The guiding wall is formed of a first material which is capable of absorbing rays or the first material is coated on an inside of the guiding wall, and the guiding cavity has a central axis extending in a direction from the rear collimator to the front collimator, and the ray beam guiding device further comprises at least one fin plate provided in the guiding cavity of the ray beam guiding device. The at least one fin plate is configured for blocking and/or absorbing scattered rays.

First claim

What is claimed is:

1. A ray beam guiding device for guiding ray beams in a ray inspection apparatus, the ray beam guiding device being provided in a housing of the ray inspection apparatus, two ends of the ray beam guiding device being connected to a front collimator and a rear collimator, respectively, the ray beam guiding device comprising a plurality of guiding walls and a guiding cavity surrounded by the guiding walls,
wherein the guiding walls are formed of a first material which is capable of absorbing rays or the first material is coated on an inside of the guiding walls, and the guiding cavity has a central axis extending in a direction from the rear collimator to the front collimator, and
wherein the ray beam guiding device further comprises at least one fin plate provided in the guiding cavity of the ray beam guiding device, the at least one fin plate being configured for blocking and/or absorbing scattered rays.

2. The ray beam guiding device according to claim 1 , wherein the ray beam guiding device comprises a rear fin portion provided on an end of the rear collimator located in the guiding cavity, the rear fin portion comprising at least one fin plate.

3. The ray beam guiding device according to claim 1 , wherein the ray beam guiding device comprises a front fin portion provided on an end of the front collimator located in the guiding cavity, the front fin portion comprising at least one fin plate.

4. The ray beam guiding device according to claim 1 , wherein the fin plate is sized such that most of the scattered rays through the front collimator and/or the rear collimator are blocked by the fin plate.

5. The ray beam guiding device according to claim 1 , wherein the fin plate is formed of a second material which is capable of absorbing rays or the second material is coated on a side of the fin plate facing towards the central axis of the guiding cavity, for absorbing the scattered rays through the front collimator and/or the rear collimator.

6. The ray beam guiding device according to claim 1 , wherein each fin plate comprises a first portion connected to the front collimator and/or the rear collimator and a second portion extending parallel to the central axis of the guiding cavity.

7. The ray beam guiding device according to claim 2 , wherein the rear fin portion comprises a first fin plate and a second fin plate, and the first fin plate and the second fin plate are symmetrical with respect to the central axis of the guiding cavity.

8. The ray beam guiding device according to claim 2 , wherein the rear fin portion consists of one fin plate located at one side of the central axis of the guiding cavity.

9. The ray beam guiding device according to claim 5 , wherein the first material and the second material are the same material.

10. A ray inspection apparatus, comprising:
a ray source configured to generate rays;
a rear collimator configured to process the rays generated by the ray source into a ray beam with a specific shape;
a front collimator configured to divide the ray beam penetrating an object to be inspected into a plurality of ray beams;
a detector;
a ray beam guiding device according to claim 1 ;
wherein the ray beam guiding device is arranged between the front collimator and the rear collimator.

11. The ray beam guiding device according to claim 2 , wherein the ray beam guiding device comprises a front fin portion provided on an end of the front collimator located in the guiding cavity, the front fin portion comprising at least one fin plate.

12. The ray beam guiding device according to claim 2 , wherein the fin plate is sized such that most of the scattered rays through the front collimator and/or the rear collimator are blocked by the fin plate.

13. The ray beam guiding device according to claim 3 , wherein the fin plate is sized such that most of the scattered rays through the front collimator and/or the rear collimator are blocked by the fin plate.

14. The ray beam guiding device according to claim 2 , wherein each fin plate comprises a first portion connected to the front collimator and/or the rear collimator and a second portion extending parallel to the central axis of the guiding cavity.

15. The ray beam guiding device according to claim 3 , wherein each fin plate comprises a first portion connected to the front collimator and/or the rear collimator and a second portion extending parallel to the central axis of the guiding cavity.

16. The ray beam guiding device according to claim 4 , wherein each fin plate comprises a first portion connected to the front collimator and/or the rear collimator and a second portion extending parallel to the central axis of the guiding cavity.

17. The ray beam guiding device according to claim 5 , wherein each fin plate comprises a first portion connected to the front collimator and/or the rear collimator and a second portion extending parallel to the central axis of the guiding cavity.

18. The ray beam guiding device according to claim 3 , wherein the front fin portion comprises a first fin plate and a second fin plate, and the first fin plate and the second fin plate are symmetrical with respect to the central axis of the guiding cavity.

19. The ray beam guiding device according to claim 11 , wherein the front fin portion and the rear fin portion both comprise a first fin plate and a second fin plate, and the first fin plate and the second fin plate are symmetrical with respect to the central axis of the guiding cavity.

20. The ray beam guiding device according to claim 3 , wherein the front fin portion consists of one fin plate located at one side of the central axis of the guiding cavity.

Assignees

• Nuctech Co Ltd
• Nuctech Jiangsu Company Ltd

Inventors

• Chen Zhiqiang
• Li Yuanjing
• Zhao Ziran
• Wu Wanlong
• Li Junli
• Ruan Ming
• Ding Guangwei

Classifications

• G21K1/025 Primary

  using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation · CPC title

• G21F3/00

  Shielding characterised by its physical form, e.g. granules, or shape of the material · CPC title

• G21K1/10 Primary

  Scattering devices; Absorbing devices; Ionising radiation filters · CPC title

• G01N23/02

  by transmitting the radiation through the material · CPC title

• H05G1/02 Primary

  Constructional details · CPC title