US 4,978,983 AGranted

Composite camera with automatic parallax correction

OwnerLennart St.ANG.lforsinventor

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Abstract

A camera unit is composed of a first camera for photochemical image reproduction and a second, electronic camera. The first camera is provided with a first lens having a first image registration region. The image which is projected onto image plane of the first camera corresponds to the first image registration region. The electronic camera is provided with a second lens whose optical axis is displaced relative to the optical axis of the lens of the first camera. The image registration region of the electronic camera, and thus also of the image projected on its image plane, differs in image content from the image content of the first camera due to the parallax which the displacement causes. A control device is provided for processing an electrical signal received from photosensitive elements contained in the electronic camera. This processing is carried out in accordance with the output of sensors, which generate signals representing the state of the lens of the first camera with respect to focal length and focussed distance, which determine the size of the parallax. The photosensor elements comprise the image lane of the electronic camera. Those photosensor elements which register the image registration region of the photochemical camera are then determined. An output signal is composed for reproduction and/or storage of an image corresponding to the image which the first camera is set to capture on its image plane.

Claims3

Dependent claims

A composite camera arrangement forming a camera unit, said camera unit comprising:

a first camera for photochemical image registration on film of a first projected image, the first camera including:
a first lens having a first image registration region and a first optical axis;
a first image plane;
lens data means for generating lens state signals according to the state of the first lens, including a focal length signal and a focussed distance signal;
said first projected image being projected onto the first image plane and corresponding to the first image registration region;
a second camera for electronic image registration including:
a second lens having a second image registration region, and having a second optical axis displaced from the first optical axis;
photosensitive means for photoelectrically registering the first and second image registration regions, including a plurality of photosensitive elements;
control means for receiving the lens state signals;
for selecting, on the basis of the lens state signals and the displacement of the first optical axis from the second otical axis, from among the photosensitive elements primary photosensitive elements corresponding to and registering the first registration region;
and for generating an output signal corresponding to a photoelectric representation of the first projected image;
and
in which the focal length of the first lens is in a predetermined range, and in which the second lens has an image angle sufficiently large that the first image registration region is contained in the second image registration region for all focal lengths of the first lens in the predetermined range.

10 more elements

Dependencies are inferred from the claim text.