Photography – With viewfinder – Parallax correction
Reexamination Certificate
2000-02-23
2001-06-05
Gray, David M. (Department: 2851)
Photography
With viewfinder
Parallax correction
Reexamination Certificate
active
06243539
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a camera and more particularly to an apparatus for compensating parallax in taking a close-up picture in a manual focus by a camera.
2. Related Art
A parallax occurred in taking a close-up picture on subject
20
by a conventional camera
10
is shown in FIG.
1
. It is understood that parallax is defined as the difference between the area taken in by a camera lens
12
and the area seen in the viewfinder
11
. This is commonly found in commercially available viewfinder-type twin-lens reflex camera and digital camera. Further, the amount of angular degree of such parallax becomes larger as the subject
20
is approaching camera
10
. This is not desirable.
The correctness of view finding is adversely affected if a picture is taken at an angle other than eye level such as high or low angle. This may be corrected if a camera user moves the camera based on the height of subject in order to make eye
30
align with viewfinder
11
. However, such technique has a limit if the subject is out of the sight of eye
30
despite of above camera movement. It is understood that picture taken under this condition is not good. Thus improvement exists.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a parallax compensation apparatus for camera for adjusting the difference between the position taken in by a camera lens and the position seen in the viewfinder in taking a close-up picture. With this, the parallax as experienced by prior art is eliminated.
The advantages of the present invention are realized by providing a parallax compensation apparatus for camera comprising a viewfinder pivotably connected to main body of camera for locating objects to be taken; a follower link unit pivotably connected to main body of camera having one end pivotably connected to viewfinder for causing viewfinder to pivot therealong; and an adjusting unit having one end connected to the other end of follower link unit for causing follower link unit to rotate by moving adjusting unit such that optical axis of viewfinder meets optical axis of lens in the subject to be taken.
There is an adjustment unit may be additionally provided by the invention for changing direction. As such, the moving direction of adjusting unit is the same as the moving direction of viewfinder when user rotates or moves the adjusting unit.
There is an adjusting wheel may be further provided by the invention for connecting to follower link unit. As such, viewfinder may move as adjusting wheel rotates. This also achieves the purpose of compensating parallax.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
REFERENCES:
patent: 2012514 (1935-08-01), Mitchell
patent: 2300245 (1942-10-01), Bell
patent: 2552244 (1951-05-01), White
patent: 3333521 (1967-08-01), Daniel, Jr.
patent: 3664250 (1972-05-01), Land
patent: 5117247 (1992-05-01), Nakai et al.
Birch & Stewart Kolasch & Birch, LLP
Gray David M.
Inventec C'orporation
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