Two piece ceramic Soller slit collimator for X-ray collimation

• US 4,856,043 A
• Filed: 07/18/1988
• Issued: 08/08/1989
• Est. Priority Date: 07/18/1988
• Status: Expired due to Fees

• Current Assignee: North American Philips Corp. (Koninklijke Philips N.V.)
• Original Assignee: North American Philips Corp. (Koninklijke Philips N.V.)
• Inventors: Zola, John J.
• Primary Examiner(s): Fields, Carolyn E.
• Assistant Examiner(s): Porta, David P.
• Application Number:
  US07/220,775
• Time in Patent Office: 386 Days
• Field of Search: 378/147, 378/149, 378/82, 378/84, 250/505.1, 250/515.1, 252/478
• US Class Current: 378/149
• CPC Class Codes: G21K 1/02 using diaphragms, collimators
• CPC Class Codes: G21K 1/025 using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation

Abstract

A Soller slit and method of producing a Soller slit by forming a plurality of grooves in two identical ceramic blocks. The two blocks are then bound together with parallel blades of each block facing each other. The ceramic blocks can contain lead titanate.

Claims

1. A method of producing a Soller slit collimator for use in X-ray analysis, said method comprising

(a) forming a plurality of narrow grooves perpendicular to two parallel surfaces of two rectangular ceramic blocks of essentially identical configuration and composition and capable of absorbing X-radiation each of said grooves being separated from each other by a blade, each of said ceramic blocks being provided with upper and lower wall portions parallel to said grooves,

(b) positioning said resultant grooved ceramic blocks in a facing relationship with each other so that corresponding surfaces of the upper and lower wall portions and corresponding blades of said ceramic blocks are in mutual contact and in an essentially parallel relationship with each other and

(c) adhesively binding together said ceramic block along the corresponding surfaces of top and bottom wall portions of said ceramic blocks.

2. A method of producing a Soller slit for use in X-ray analysis, said method comprising:

(a) positioning two rectangular ceramic blocks of essentially identical composition and configuration, and capable of absorbing X-radiation, in a single plane in a manner such that a surface of one of said blocks is parallel with and opposing to a surface of the other block and an axis of one block is convergent with an axis of the other block.

(b) simultaneously forming a plurality of grooves perpendicular to said two surfaces of said ceramic blocks, each of said grooves being separated from each other by a blade projecting from a surface of said ceramic block, each of said grooves having a width of about 50 to 1000 microns, each of said blades having a thickness of 50 to 200 microns and each of said ceramic blocks being provided with upper and lower wall portions parallel to said grooves;

(c) positioning the resultant grooved ceramic blocks in a facing relationship with each other so that corresponding surfaces of the upper and lower wall portions and corresponding blades of said ceramic blocks are in mutual contact and in an essentially parallel relationship with each other and

(d) adhesively binding together said ceramic blocks along the corresponding surfaces of top and bottom wall portions of said ceramic blocks.

4. The method of claim 2 wherein the ceramic block comprising an oxide of at least one element selected from the group consisting of lead, zirconium and titanium.

6. The method of claim 4 wherein the grooves are about 150 microns wide and the blades are about 25 microns thick.

8. The method of claim 4 wherein each of the ceramic blocks comprise a lead titanate.

10. The method of claim 2 wherein the grooves are formed by sawing.

11. The method of claim 2 wherein the ceramic blocks are adhesively bound together with an epoxy adhesive.

3. A Soller slit collimator for use in X-ray analysis, said collimator comprising two rectangular ceramic blocks, each of said blocks being of essentially identical composition and configuration, each of said blocks containing heavy elements and being capable of absorbing X-radiation, each of said blocks having a plurality of parallel blades projecting out of a solid wall portion of said block and in contact and parallel facing relationship with a corresponding blade of said other block and said blocks being adhesively bound to said other at corresponding surfaces of upper and lower wall portions of said blocks.

5. The collimator of claim 3 wherein the ceramic block comprising an oxide of at least one element selected from the group consisting of lead, zirconium and titanium.

7. The collimator of claim 5 wherein the grooves are about 150 microns wide and the blades are about 25 microns thick.

9. The collimator of claim 5 wherein each of the ceramic blocks comprise a lead titanate.

12. The collimator of claim 3 wherein the ceramic blocks are adhesively bound to each other with an epoxy adhesive.