Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
1995-06-05
2001-04-03
Westin, Edward P. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S559080, C250S559290, C250S559380, C348S142000
Reexamination Certificate
active
06211506
ABSTRACT:
FIELD OF THE INVENTION
This invention discloses method and apparatus for optically determining the dimension, location and attitude of part surfaces. Particular embodiments describe optical triangulation based co-ordinate measurement machines capable of accurate measurement of complex surfaces, such as gear teeth and turbine blades.
The invention also discloses means for accurately sensing in up to 5 axes the xy location, range and attitude in two planes of an object or object feature, as well as the measurement of angular and size variables on the object.
There are many triangulation sensors in the present art, but none is known to have achieved what this one discloses, namely 0.0001″ or even 50 millionths of an inch accuracy on complex surfaces, in a manner capable of high speed analysis of surface form.
To be truly accurate on surfaces of widely varying form, the sensor must have an ability to operate with huge (e.g. 10
4
) variations in returned light intensity from the part, without giving an apparent change in dimension. And too, the sensor must provide high resolution, drift free digital readout of part dimension. These and other features are present in the invention.
REFERENCES:
patent: 3227886 (1966-01-01), Dunigan et al.
patent: 3481672 (1969-12-01), Zoot
patent: 3513320 (1970-05-01), Weldon
patent: 3520607 (1970-07-01), Zoot
patent: 3679307 (1972-07-01), Zoot et al.
patent: 3723003 (1973-03-01), Vockenhuber
patent: 3796492 (1974-03-01), Cullen et al.
patent: 3854035 (1974-12-01), Tyler
patent: 3888362 (1975-06-01), Fletcher et al.
patent: 3895870 (1975-07-01), Cullen et al.
patent: 3897156 (1975-07-01), Chasson
patent: 3899250 (1975-08-01), Bamburg et al.
patent: 3947119 (1976-03-01), Bamburg et al.
patent: 3986774 (1976-10-01), Lowrey et al.
patent: 3994583 (1976-11-01), Hutchins
patent: 4004852 (1977-01-01), Pentecost
patent: 4040738 (1977-08-01), Wagner
patent: 4047025 (1977-09-01), Lemelson
patent: 4135204 (1979-01-01), Davis, Jr. et al.
patent: 4146327 (1979-03-01), Harris
patent: 4168437 (1979-09-01), Nihonmatsu
patent: 4173788 (1979-11-01), Laliotis
patent: 4183672 (1980-01-01), Raber et al.
patent: 4187051 (1980-02-01), Kirsch et al.
patent: 4188544 (1980-02-01), Chasson
patent: 4200393 (1980-04-01), Suzuki et al.
patent: 4221973 (1980-09-01), Nosler
patent: 4248532 (1981-02-01), Nosler
patent: 4257705 (1981-03-01), Hosoe et al.
patent: 4259592 (1981-03-01), Frungel et al.
patent: 4281342 (1981-07-01), Ueda et al.
patent: 4297725 (1981-10-01), Shimizu et al.
patent: 4373804 (1983-02-01), Pryor et al.
patent: 4613942 (1986-09-01), Chen
patent: 4674869 (1987-06-01), Pryor et al.
patent: 5164579 (1992-11-01), Pryor et al.
patent: 5280179 (1994-01-01), Pryor et al.
patent: 5362970 (1994-11-01), Pryor et al.
patent: 0728860 (1966-03-01), None
patent: 1536022 (1978-12-01), None
patent: 7900189 (1979-04-01), None
Pryor et al., “Laser-Based Gauging/Inspection”, Electro-optical Systems Design, vol. 7, No. 5, May 1975.
Hageniers Omer L.
Hockley Bernard
Liptay-Wagner Nick
Pastorius W. J.
Pryor Timothy R.
Diffracto Ltd.
Larson & Taylor
Lee John R
Westin Edward P.
LandOfFree
Method and apparatus for electro-optically determining the... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for electro-optically determining the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for electro-optically determining the... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2534649