Film data recording/reproducing apparatus for a camera by writing/reading pits recorded on a film
AssigneeOlympus Optical Co., Ltd.
InventorYasunobu Ootsuka
Life of this patent
Estimating the term…
Abstract
A thermal head records data on a photographing film in the form of fine pits formed on the surface of the photographing film by its fine heating sections tightly contacted to the photographing film while the photographing film is being moved in a camera. A data detecting optical system projects light on the pits representing data on the surface of the photographing film and receives the light reflected by the photographing film. A line sensor detects rays of light scattered by the pits when the photographing film reflects the projected light, thereby reading out the recorded data.
Claims33
A data recording apparatus for a camera using a photographing film comprising:
- a thermal head arranged along a film path of a camera and capable of closely contacting with a photographing film in the camera, said thermal head having a plurality of fine heating section means for forming shallow pits on the photographing film when energized to heat the photographing film, wherein the shallow pits do not extend completely through the thickness of the photographing film;
- and
- control means for controlling thermal conditions of said plurality of fine heating section means of said thermal head according to the data to be recorded on the photographing film.
An optical apparatus using a photographing film comprising:
- shooting means for exposing said photographing film to an object image;
- encoding means for encoding data relating to at least one of said object image and exposure conditions;
- and
- pit-forming means for forming shallow pits on the photographing film at a position associated with said object image according to data from said encoding means.
A camera for recording data on a film, comprising:
- a shooting mechanism for exposing said film to an object image;
- film feeding means for feeding said film;
- detecting means for detecting a feeding state of the film;
- encoding means for encoding data to be recorded on said film;
- pit-forming means for forming shallow pits on said film, said pit-forming means abutting said film;
- and
- control means for controlling said pit-forming means to thereby control recording of encoded data onto said film according to an output of said detecting means and to an output of said encoding means while said film feeding means feeds said film.
A data recording apparatus for a camera, comprising:
- data writing means for writing data on a photographing film in the camera;
- said data writing means including a thermal head for forming fine pits on the photographing film, thereby writing data on the photographing film;
- and
- control means for controlling writing of data in a data writing region of the film, and for controlling writing of correction data on a leading writing region of the film which precedes said data writing region, said leading writing region being a region for writing correction data on the film.
Dependencies are inferred from the claim text.