Anamorphic photography and squeeze ratios for digital imagers
A digital camera comprising a digital image sensor and at least one corrective lens element configured to reduce a blurring of an image in a horizontal or vertical dimension on the digital image sensor. The digital image sensor may be larger than a 28 millimeter diagonal.
1. A method for improving an optical image provided by a lens system as used with a camera comprising passing a compressed optical image produced by at least one anamorphic element of the lens system to at least one corrective lens element, wherein the at least one corrective element is configured to improve an optical quality of the compressed optical image on a digital image sensor of the camera.
2. The method of claim 1 , wherein the compressed image produced by the at least one anamorphic element passes in an optical axis to the at least one corrective lens element.
3. The method of claim 1 , wherein the at least one anamorphic element is configured to compress the image in a vertical or horizontal dimension.
4. The method of claim 1 , comprising passing the compressed image through at least one powered lens element before passing the compressed image to the one or more corrective lens element.
5. The method of claim 4 , wherein the at least one powered lens is in an optical axis of the at least one anamorphic lens element.
6. The method of claim 1 , wherein the digital image sensor comprises a filter.
7. The method of claim 1 , wherein the compressed optical image produced by the at least one anamorphic element has a squeeze ratio of from approximately 1.25 to 1.8.
8. The method of claim 1 , wherein the one or more corrective lens element is configured to reduce a blurring of the compressed optical image.
9. A lens group comprising:
at least one anamorphic lens element configured to produce a compressed optical image; and
at least one corrective lens group configured to improve an optical quality of the compressed optical image on a digital image sensor of a camera used with the lens group.
10. The lens group of claim 9 , wherein the digital image sensor includes a filter.
11. The lens group of claim 9 , wherein the at least one corrective lens element is in an optical axis of the at least one anamorphic lens element.
12. The lens group of claim 9 , wherein the compressed optical image has a squeeze ratio of approximately 1.25 to 1.8.
13. The lens group of claim 9 , comprising at least one powered lens element interposed between the at least one anamorphic lens element and the at least one corrective lens element.
14. The lens group of claim 9 , wherein the at least one corrective lens group is configured to reduce a blurring of the compressed optical image.
15. The lens group of claim 9 , wherein the at least one corrective lens element comprises at least one of a toroidal lens element and an anti-aliasing feature.
16. A combination of lens elements for improving a quality of an optical image for digital image capture comprising:
at least one anamorphic lens element configured to compress an optical image;
at least one corrective lens element configured to receive the compressed optical image and improve a quality of the compressed optical image on a digital image sensor used for digital image capture.
17. The combination of claim 16 , comprising at least one powered lens element between the at least one anamorphic lens element and the at least one corrective lens element, and in an optical axis therewith.
18. The combination of claim 16 , wherein the digital image sensor comprises a filter.
19. The combination of claim 16 , wherein the at least corrective lens element is configured to reduce a blurring of the compressed optical image in a direction of compression.
20. The combination of claim 16 , wherein the at least one corrective lens element comprises at least one of a toroidal lens element and an anti-aliasing feature.