Spot microdensitometer for spectral density analysis of film

Details Spot microdensitometer for spectral density analysis of film Spot microdensitometer for spectral density analysis of film

1995-03-22

1997-04-01

Font, Frank G.

Optics: measuring and testing

For light transmission or absorption

Of photographic film

356444, G01N 2100

Patent

active

056172133

ABSTRACT:
A spot densitometer system comprising a viewing assembly, a photodetection apparatus optically connected to the viewing assembly, and a computer interface electrically connected to the photodetection apparatus. The viewing assembly comprises a flat spectrum lamp, condensing lens, film handler, focusing lens comprises a photomultiplier tube optically connected to the viewing assembly, a monochromator electrically connected to the photomultiplier tube, and a control unit electrically attached to the photomultiplier tube and the monochromator. The computer interface comprises an analog to digital card and signal processing software, which convert analog electrical signals from the photodetection apparatus into useful output formats such as color density, relative exposure, and log relative exposure. The position of the film emulsion whose density is being measured may be adjusted vertically and horizontally.

REFERENCES:
patent: 2649834 (1953-08-01), Sweet
patent: 3525571 (1970-08-01), Gebel
patent: 3741664 (1973-06-01), Torin
patent: 3856417 (1974-12-01), Bey et al.
patent: 3942898 (1976-03-01), Anderson
patent: 3994587 (1976-11-01), Yamamoto et al.
patent: 3994593 (1976-11-01), Kato et al.
patent: 4150899 (1979-04-01), Nakamura
patent: 4229107 (1980-10-01), Childers
patent: 4229108 (1980-10-01), Childers
patent: 4329591 (1982-05-01), Fujiwara et al.
patent: 4338033 (1982-07-01), Kato
patent: 4533253 (1985-08-01), Okano
patent: 4551023 (1985-11-01), Nakauchi
patent: 4946282 (1990-08-01), Task

Affiliated with

Also associated with

Rating

Spot microdensitometer for spectral density analysis of film does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spot microdensitometer for spectral density analysis of film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spot microdensitometer for spectral density analysis of film will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-543677