6results about How to "Big image" patented technology

This application discloses an optical lens. The optical lens, along the optical axis from the object side to the image side, sequentially includes: a first lens with negative optical power, whose image side is concave; a second lens with optical power, whose object side is concave and image side is convex; a third lens with optical power, whose object side is convex; a fourth lens with positive optical power, whose image side is convex; a fifth lens with positive optical power, whose object side and image side are both convex; a sixth lens with negative optical power, whose object side is concave; a seventh lens with positive optical power, whose object side and image side are both convex; and an eighth lens with optical power, whose object side is convex and image side is concave. The sum of the distances between any two adjacent lenses on the optical axis, ∑AT, and the distance on the optical axis from the object side of the first lens to the image plane of the optical lens, TTL, satisfy: 0.1 ≤ ∑AT / TTL ≤ 0.2.

This invention discloses an optical system and a projection device. The optical system has an object side and an image side arranged opposite each other along the optical axis. From the object side to the image side, the optical system sequentially includes a zoom lens assembly and a focusing lens assembly. The zoom lens assembly includes a first lens assembly with negative optical power, an aperture stop, a second lens assembly with positive optical power, and a third lens assembly with positive optical power, arranged sequentially from the object side to the image side. The aperture stop and the second lens assembly are fixed in position relative to the image side. The first lens assembly and the third lens assembly can move closer to each other or further away from each other along the optical axis to enable the optical system to zoom. The focusing lens assembly has positive optical power and can move to a corresponding position along the optical axis to enable the optical system to focus, thus solving the problem of low zoom efficiency in existing optical lenses.

The present invention provides an optical lens. The number of lenses with optical power is five. Along the optical axis, from the object side to the imaging surface, it successively includes: a first lens with negative optical power; a second lens with positive optical power, whose object side surface is convex and whose image side surface is concave; a third lens with negative optical power, whose object side surface is convex and whose image side surface is concave; a fourth lens with positive optical power, whose object side surface is convex; a fifth lens with positive optical power; wherein, the focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: -1.4 < f3 / f < -0.85. The optical lens provided by the present invention has one or more advantages such as a large image surface, a long focal length, a large aperture, and high imaging quality through specific surface shape matching and reasonable optical power distribution.

The application provides an optical lens, which comprises, in sequence from an object side to an imaging surface along an optical axis, a first lens with negative optical power, wherein the object side surface of the first lens is a convex surface and the image side surface of the first lens is a concave surface; a second lens with positive optical power; a third lens with positive optical power, wherein the object side surface of the third lens is a convex surface; a fourth lens with positive optical power, wherein the image side surface of the fourth lens is a convex surface; a fifth lens with negative optical power, wherein the object side surface of the fifth lens is a convex surface and the image side surface of the fifth lens is a concave surface; a sixth lens with positive optical power, wherein the object side surface of the sixth lens is a convex surface and the image side surface of the sixth lens is a convex surface; and a seventh lens with negative optical power, wherein the object side surface of the seventh lens is a concave surface and the image side surface of the seventh lens is a convex surface; the optical total length TTL of the optical lens satisfies 14.2mm<TTL<15.2mm; and the optical total length TTL of the optical lens and the effective focal length f of the optical lens satisfy 3<TTL / f<5. The optical lens provided by the application can improve the imaging quality of the optical lens and has the advantage of excellent imaging quality by specific surface shape matching and reasonable optical power distribution.

The present invention provides an optical lens. The number of lenses with optical power is five. Along the optical axis from the object side to the imaging surface, it sequentially includes: a first lens with negative optical power, whose object side surface is concave; a second lens with positive optical power, whose object side surface is concave and whose image side surface is convex; a third lens with negative optical power, whose image side surface is concave; a fourth lens with positive optical power, whose object side surface is convex and whose image side surface is concave; a fifth lens with positive optical power, whose image side surface is convex; wherein, the focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: 0.9 < f5 / f < 1.3. The optical lens provided by the present invention has one or more advantages such as a large image surface, a long focal length, a large aperture, and high imaging quality through specific surface shape matching and reasonable optical power distribution.

The invention provides an optical lens, which comprises five lenses with focal power and sequentially comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface along an optical axis, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has negative focal power, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface; the fifth lens has positive focal power, and the object side surface of the fifth lens is a convex surface; wherein the focal length f2 of the second lens and the effective focal length f of the optical lens meet the following conditions: 0.8 lt; f2 / flt; 1.1. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of large image surface, long focus, large aperture, high imaging quality and the like.