Arrangement for the projection of a multi- coloured image into a projection surface
An arrangement for projecting a multi-color image, including at least two image-generating elements which enable generation of one partial color image each of the multi-color image, and a color combiner which superimposes the light partial beam paths and emits it as a common beam. The arrangement further includes projection optics. The image scales being different for the partial color images, one optical device each is arranged in one or more of the partial beam paths of the partial color images whose image scales differ and each optical device is configured such that, due to the change in the image scale of the corresponding partial color image effected by it, the image scale of the partial color image corresponds to a predetermined, common image scale.
1. A multicolor projector, comprising:
projection optics;
a first image generating element generating a first partial image in a first color;
a second image generating element generating a second partial image in a second color;
a color combiner following the first and second image generating elements to combine the first and second partial images;
the first and second partial images being affected by lateral chromatic aberration and having different image sizes; and
at least one optical device in a beam path altering the size of at least one of the first and second partial images to substantially conform the different image sizes to a single image size.
2. The multicolor projector as claimed in claim 1 , in which the optical device comprises an optical element selected from a group consisting of a lens and a curved surface of the color combiner.
3. The multicolor projector as claimed in claim 1 , further comprising a third image generating element generating a third partial image in third color and in which the image sizes of the first and second partial images are conformed to the single image size by the optical device and the image size of the third partial image is conformed to the single image size by the projection optics.
4. The multicolor projector as claimed in claim 3 , in which the first, second and third image generating elements comprise LCD modules.
5. The multicolor projector as claimed in claim 3 , in which the first, second and third image generating elements are colored red, green and blue.
6. A method of compensating for lateral chromatic aberration in a projector comprising the steps of:
generating a first partial image having a first color and a second partial image having a second color, the first and second images having different image sizes as a result of lateral chromatic aberration;
optically altering at least one of different image sizes to conform the different image sizes to a single image size;
combining the first and second partial images; and
projecting the combined image.
7. The method as claimed in claim 6 , further comprising the steps of generating a third partial image having a third color; and optically altering a size of the third partial image to conform it to the single image size.
8. The method as claimed in claim 7 , further comprising the steps of optically altering at least one of the different image sizes via an optical device comprising an optical element selected from a group consisting of a lens and a curved surface of a color combiner.
9. The method as claimed in claim 7 , further comprising the steps of generating the first, second and third partial images with LCD modules and in which the first color is red, the second color is blue and the color is green.