Patent classifications
G
PHYSICS
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G03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
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G03B
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
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11/00
Filters or other obturators specially adapted for photographic purposes
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G03B11/02

Card operation device for controlling exposure time
10148891 · 2018-12-04 ·

A card operation device includes a body having a mounting hole for being mounted to a camera lens. A card is connected to the body and located in front of the lens. The card is movable up and down along rails in two insides of the body, and may be a masking card or a slotted card. The body has a driving unit and multiple positioning units. A controller is electrically connected to the body to control up-and-down movement, shaking and stopping of the card in front of the lens. The masking card and the slotted card are automatically operated when being set.

Card operation device for controlling exposure time
10148891 · 2018-12-04 ·

A card operation device includes a body having a mounting hole for being mounted to a camera lens. A card is connected to the body and located in front of the lens. The card is movable up and down along rails in two insides of the body, and may be a masking card or a slotted card. The body has a driving unit and multiple positioning units. A controller is electrically connected to the body to control up-and-down movement, shaking and stopping of the card in front of the lens. The masking card and the slotted card are automatically operated when being set.