Title:
OPTICAL KNIFE-EDGE DETECTOR WITH LARGE DYNAMIC RANGE
Document Type and Number:
WIPO Patent Application WO/2015/075723
Kind Code:
A3
Abstract:
A detection arrangement and method for directing the sensitivity of an optical knife-edge detection system to its optimal operating point. This is referred to as an increase in the detection dynamic range of the system with advantageous applications for detecting motion of a surface such as for Atomic Force Microscopy as well as detecting acoustic vibrations on unstable surfaces. A pair of parallel reflecting surfaces, such as an optical slab waveguide, serve to reflect the sensing beam back onto the knife-edge detector once it is shifted off its sensing range. Allowing multiple reflections, the sensing beam is maintained on the knife-edge detector even at large angular offsets from the optimal operating point of the basic knife-edge detector. Use of a modified arrangement, with two knife-edge detectors at quadrature ensures near-optimal sensitivity at a detection dynamic range up to forty-fold larger than that of the basic knife-edge system.
Inventors:
AHARONI ABRAHAM (IL)
Application Number:
PCT/IL2014/051017
Publication Date:
August 27, 2015
Filing Date:
November 24, 2014
Export Citation:
Assignee:
TECHNION RES & DEV FOUNDATION (IL)
International Classes:
G01D5/30; G01Q20/02; G01H9/00; G01L9/00
Foreign References:
| EP0394962A2 | 1990-10-31 | |||
| US5394741A | 1995-03-07 | |||
| US5294804A | 1994-03-15 | |||
| EP0551814A1 | 1993-07-21 |
Other References:
See also references of EP 3074777A2
Download PDF:
Previous Patent: NOVEL WHEEL AND METHODS OF PRODUCTION
Next Patent: SLIM-FORM CHARGER FOR A MOBILE PHONE
Next Patent: SLIM-FORM CHARGER FOR A MOBILE PHONE