WIDE-ANGLED LENS OF FISH EYE TYPE Russian patent published in 2010 - IPC G02B9/64 

FIELD: optics.

SUBSTANCE: lens may be used for operation with CCD-receivers. Lens comprises seven components. The first and second components are negative menisci, which are inverted with their concavity to space of images. The third one is glued of negative and positive lenses. The fourth component is glued of negative and positive menisci, which are inverted with their concavity to space of images. The fifth component is positive and is glued of positive and negative menisci, which are inverted with their concavity to object. The sixth one is glued of negative and positive lenses. The seventh one is positive one, being glued of convexo-convex lens and negative meniscus, which is inverted with its concavity to object. Aperture diaphragm is installed between the fourth and fifth components. Positive lens of the third component may be arranged as convexo-convex. Negative lens of the sixth component may be arranged in the form of meniscus inverted by its concavity to image.

EFFECT: improved quality of image in the whole field due to structural arrangement of optical scheme of lens.

3 cl, 2 dwg, 2 tbl