Microdensitometer system with micrometer resolution for...

Optics: measuring and testing – For light transmission or absorption – Of photographic film

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C250S559020

Reexamination Certificate

active

06927859

ABSTRACT:
Radiation dose deposited on a radiochromic film is considered as a dose image. A precise image extraction system with commensurate capabilities is required to measure the transmittance of the dose image and correlate it with radiation dose. The disclosed microdensitometer system is designed to achieve this goal according to the unique characteristics of the radiochromic films, namely (a) the linearity and sensitivity of the dose response of the radiochromic films being highly dependent on the wavelength of the analyzing light and (b) the inherently high spatial resolution of the radiocbromic films. The disclosed microdensitometer system consists of a monochromator which provides analyzing light of variable wavelength, a film holder on a high-precision scanning stage, a CCD-dedicated microscope in conjunction with a thermoelectrically cooled CCD camera, corresponding computer interfaces and a microcomputer.

REFERENCES:
patent: 3744916 (1973-07-01), Bey et al.
patent: 3802784 (1974-04-01), Reynolds et al.
patent: 3813145 (1974-05-01), Hedman et al.
patent: 3929553 (1975-12-01), van Kempen
patent: 4150899 (1979-04-01), Nakamura
patent: 4181436 (1980-01-01), Wasmund et al.
patent: 4273419 (1981-06-01), Geary
patent: 4457010 (1984-06-01), Jenkins et al.
patent: 4632549 (1986-12-01), Czabaffy et al.
patent: 4674883 (1987-06-01), Baurschmidt
patent: 4734578 (1988-03-01), Horikawa
patent: 4844617 (1989-07-01), Kelderman et al.
patent: 5053629 (1991-10-01), Thompson
patent: 5059764 (1991-10-01), Baer
patent: 5112125 (1992-05-01), Neumann
patent: 5153926 (1992-10-01), Jansson et al.
patent: 5255069 (1993-10-01), Duarte
patent: 5568192 (1996-10-01), Hannah
patent: 5617213 (1997-04-01), Shih
patent: 5623139 (1997-04-01), Sliski
patent: 5653539 (1997-08-01), Rosengaus
patent: 5859700 (1999-01-01), Yang
patent: 5875022 (1999-02-01), Kajiwara
patent: 5918469 (1999-07-01), Cardella
patent: 6455860 (2002-09-01), Mooney
patent: 2001/0012135 (2001-08-01), Kurosawa
patent: 63058127 (1988-03-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Microdensitometer system with micrometer resolution for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microdensitometer system with micrometer resolution for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microdensitometer system with micrometer resolution for... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3507288

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.