1977-10-28
1979-06-26
Gellner, Michael L.
354 23R, 354237, G03B 700, G03B 1700
Patent
active
041591704
ABSTRACT:
A camera includes a forwardly facing illuminatable visual member and a first group of laterally spaced parallel vertical light absorbent vanes extending from the face of the visual member to restrict the light rays directed therefrom to a predetermined horizontal angle which is a function of the intervane spacing and the depth of the vanes. The vane parameters are such that the predetermined angle is equal to the camera field angle or the range finder viewing angle or two groups of vanes may be provided corresponding to each of the camera and view finder field angles. A second group of vertically spaced horizontal vanes may be provided to limit the visibility of the visual member to one or more vertical angles. The first and second vane groups are perpendicular to each other and either intercept each other, from rectangular frames or are superimposed. A network is provided for varying the illumination of the visual member in response to the ambient light and another network is provided for illuminating the visual member in relation to the initiation of a self-timing cycle. Where two angles delineating vane groups are provided, the visual member is divided into corresponding differently illuminated sections.
REFERENCES:
patent: 3485152 (1969-12-01), Fuwa
Kuramoto Yoshio
Uchida Isamu
Yamashita Maki
Gellner Michael L.
Minolta Camera Kabushiki Kaisha
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