Inventor
GREIVENKAMP JR JOHN E
US16 patents
⚠️ This page may combine multiple inventors who share the name “GREIVENKAMP JR JOHN E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
EASTMAN KODAK CO
7 patentsUS4794550ADec 27, 1988
Extended-range moire contouring
EASTMAN KODAK CO161 citations98
US4791584ADec 13, 1988
Sub-nyquist interferometry
EASTMAN KODAK CO136 citations97
US4987496AJan 22, 1991
System for scanning halftoned images
EASTMAN KODAK CO117 citations95
US4575193AMar 11, 1986
Optical spatial frequency filter
EASTMAN KODAK CO117 citations95
US5075562ADec 24, 1991
Method and apparatus for absolute Moire distance measurements using a grating printed on or attached to a surface
EASTMAN KODAK CO115 citations94
US4460259AJul 17, 1984
Single lens rangefinder device having light emitter and detector
EASTMAN KODAK CO19 citations74
US5075560ADec 24, 1991
Moire distance measurements using a grating printed on or attached to a surface
EASTMAN KODAK CO10 citations73
JOHNSON & JOHNSON VISION CARE
5 patentsUS10362934B2Jul 30, 2019
System and method for the rapid measurement of the visual contrast sensitivity function
JOHNSON & JOHNSON VISION CARE14 citations84
US11213198B2Jan 4, 2022
System and method for the rapid measurement of the visual contrast sensitivity function
JOHNSON & JOHNSON VISION CARE0 citations61
US10416039B2Sep 17, 2019
Interferometer having a reference fluid tank with a prism and a motion matching window for characterizing a contact lens
JOHNSON & JOHNSON VISION CARE0 citations47
US10288522B2May 14, 2019
Characterizing the surface of a contact lens with an immersed reference prism
JOHNSON & JOHNSON VISION CARE0 citations47
US10145757B2Dec 4, 2018
Measuring ophthalmic lens using a prism with phase shifting mirror and a fluid in reference arm
JOHNSON & JOHNSON VISION CARE1 citations47