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Goniometer for Theta to 2 Theta Scanning

IP.com Disclosure Number: IPCOM000090736D
Original Publication Date: 1969-Jun-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Mees, JL: AUTHOR [+2]

Abstract

The drive system for a goniometer allows a continuous phi - 2phi scan, e.g., phi = 0 degrees - 180 , and 2 phi = 0 degrees - 360 degrees, in a single direction which eliminates conventional reciprocating scanning limited to a usable range of phi = 0 degrees - 90 degrees. Motor 1 which drives ring gear 2 with accompanying rotation at X rpm of fixedly mounted outer quill 3 and photocell support bracket 4. End gear 5 on quill 3 engages step-down gear assembly 6 engaging drive gear 7 mounted on center quill 8 upon which is fastened rotary solenoid 9. Drive gear 10 on solenoid 9 is engaged with gear 11 on shaft 12 which fixedly mounts sample holder 13. Due to the coupling with assembly 6, quill 8 and shaft 13 rotate at a common 0.5 X rpm. A sample mounted on holder 13 is phased at 180 degrees increments via solenoid 9.

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Goniometer for Theta to 2 Theta Scanning

The drive system for a goniometer allows a continuous phi - 2phi scan, e.g., phi = 0 degrees - 180 , and 2 phi = 0 degrees - 360 degrees, in a single direction which eliminates conventional reciprocating scanning limited to a usable range of phi = 0 degrees - 90 degrees. Motor 1 which drives ring gear 2 with accompanying rotation at X rpm of fixedly mounted outer quill 3 and photocell support bracket 4. End gear 5 on quill 3 engages step-down gear assembly 6 engaging drive gear 7 mounted on center quill 8 upon which is fastened rotary solenoid 9. Drive gear 10 on solenoid 9 is engaged with gear 11 on shaft 12 which fixedly mounts sample holder 13. Due to the coupling with assembly 6, quill 8 and shaft 13 rotate at a common 0.5 X rpm. A sample mounted on holder 13 is phased at 180 degrees increments via solenoid 9. This drives shaft 12 at the precise moment when the optimum point for change is required to allow continuous scanning of the sample surface by a laser, not shown, as monitored by photocell 14 mounted on bracket 4. By constant intermittent phasing of holder 13 with respect to photocell 14, the latter can be enabled to run continuously. Power to rotating parts, e.g., solenoid 9 and photocell 14, is supplied via slip rings 15 and 16.

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