WIDE-ANGLE HIGH-APERTURE PHOTOGRAPHIC OBJECTIVE Russian patent published in 2022 - IPC G02B9/64 

FIELD: optics.

SUBSTANCE: invention relates to optical instrumentation and can be used as a photographic objective in mirrorless photographic equipment. The objective comprises two components separated by an aperture diaphragm. The first component is positive and comprises a negative meniscus facing the object space with the convexity thereof, a positive double-adhered meniscus facing the object space with the convexity thereof and consisting of a negative meniscus and a positive meniscus facing the object space with the convexity thereof, a positive double-adhered meniscus facing the object space with the concavity thereof and consisting of a double-concave lens and a double-convex lens, and a positive double-adhered meniscus facing the object space with the convexity thereof and consisting of a double-convex lens and a double-concave lens. The second component is positive and comprises a single a double-convex lens, a negative meniscus facing the object space with the convexity thereof, and a double-concave lens with an aspherical surface on the concave side thereof facing the object space.

EFFECT: better image quality across the field of vision with the maintained relative aperture and magnitude of the linear field of the image.

2 cl, 2 dwg, 2 tbl