Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-02-14
2006-02-14
Nguyen, Kiet T. (Department: 2881)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C073S105000
Reexamination Certificate
active
06998602
ABSTRACT:
The invention relates to a method of and an apparatus for measuring a specimen by means of a scanning probe microscope, especially a scanning force microscope, wherein a probe (5) is displaced with respect to a specimen (6) by means of lateral and vertical shifting units (1) to measure the specimen (6); measuring light rays (21) are generated by means of a light source (20) and directed to a reflection means (91) disposed on the probe; the measuring light rays (21) are reflected at the reflection means (91), whereby reflected measuring light rays (21a) are formed; and the reflected measuring light rays (21a) are directed by means of a correction lens (47) to a detector surface (32) of a detector means (27) to generate a measurement signal, the correction lens (47) being positioned at a distance from the detector surface (32) substantially corresponding to a focal length of the correction lens (47).
REFERENCES:
patent: 5616916 (1997-04-01), Handa et al.
patent: 6032518 (2000-03-01), Prater et al.
patent: 6910368 (2005-06-01), Ray
patent: 0 564 088 (1993-10-01), None
Werf Van Der. K. et al., “Compact Stand-Alone Atomic Force Microscope”, Review of Scientific Instruments, Oct., 1993, pp. 2892-2897, vol. 64, No. 10, American Institute of Physics, New York.
JPK Instruments AG
Nguyen Kiet T.
Smith Patent Office
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