Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1980-01-10
1982-04-20
Hix, L. T.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
354 34, 354 42, 354 59, 354139, 250482, 356225, G03B 714, G03B 718
Patent
active
043256163
ABSTRACT:
Apparatus for automatically varying positioning of an infrared filter relative to a light sensing photocell of an exposure control system having scanning type shutter blades provided with cooperating pairs of primary and secondary apertures, which are displaced between first and second positions to respectively control the passage of light to a film plane and to the photocell, includes an infrared filter cooperating with at least one secondary aperture for blocking transmission of infrared to the photocell when the apertures are positioned for high ambient light conditions and for allowing passage of infrared to the photocell when positioned for low ambient light conditions where flash illumination provides a greater contribution to the exposure.
REFERENCES:
patent: 2015261 (1935-09-01), Eckler
patent: 2086791 (1937-07-01), Dresler
patent: 2380216 (1945-07-01), Carter
patent: 2585245 (1952-02-01), Harrison
patent: 2841064 (1958-07-01), Bagby
patent: 3006265 (1961-10-01), La Rue
patent: 3045124 (1962-07-01), McKinlay
patent: 3053159 (1962-09-01), Bagby
patent: 3173347 (1965-03-01), Stimson et al.
patent: 3176599 (1965-04-01), Anwyl
patent: 3208363 (1965-09-01), Easterly et al.
patent: 3229569 (1966-01-01), Frost et al.
patent: 3270638 (1966-09-01), Anwyl
patent: 3314349 (1967-04-01), Koeber
patent: 3397023 (1968-08-01), Land
patent: 3468228 (1969-09-01), Rogers
patent: 3500730 (1970-03-01), Matsubara
patent: 3536408 (1970-10-01), Norwood
patent: 3583299 (1971-06-01), Land
patent: 3589258 (1971-06-01), Koeber
patent: 3672281 (1972-06-01), Land
patent: 3709615 (1973-01-01), Blakeslee et al.
patent: 3780631 (1973-12-01), Schulman
patent: 3785265 (1974-01-01), Lardeau
patent: 3792649 (1974-02-01), Douglas
patent: 3832722 (1974-08-01), Douglas
patent: 3896458 (1975-07-01), Johnson
patent: 3903413 (1975-09-01), Manning
patent: 3942183 (1976-03-01), Whiteside
patent: 3942184 (1976-03-01), Blinow
patent: 3963333 (1976-06-01), Meuller
patent: 4040070 (1977-08-01), Hochreiter
patent: 4040072 (1977-08-01), Johnson
patent: 4104653 (1978-08-01), Johnson
patent: 4147418 (1979-04-01), Whiteside
patent: 4156564 (1979-05-01), Tsunekawa
patent: 4160588 (1979-07-01), Beach
Hix L. T,.
Payne Leslie J.
Polaroid Corporation
Schreyer Stafford D.
LandOfFree
Apparatus for varying the spectral filter over the photocell as does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for varying the spectral filter over the photocell as , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for varying the spectral filter over the photocell as will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1261176