31results about How to "Strong light transmission ability" patented technology

An ultra wide-angle lens, including successively from object space to image space: a first lens (L1) and a second lens (L2) having negative focal power, a third lens (L3) having positive focal power, a fourth lens (L4) having negative focal power and a fifth lens (L5) having positive focal power. A gluing lens having positive focal power is formed by gluing the fourth lens (L4) and the fifth lens (L5) together, which satisfies BFL / EFL = 2.4, where BFL is the distance between the most exterior point on the image space side of the fifth lens and the imaging surface in the ultra wide-angle lens, and EFL is the focal length of the ultra wide-angle lens. In the case of a shorter total length TTL, an ultra wide-angle lens has a comparatively longer lens back focal length BFL, to satisfy the requirement for larger-sized peripheral electronics of an imaging sensor during camera design, and a longer BFL causes lens components and optical filters to be located at a farther position from the imaging sensor, which can effectively lower the requirements of cleanliness of the surface of each lens component and optical filter, and make the assembly and manufacturing of cameras much easier.

The invention relates to an optimal lens. The optical lens sequentially comprises a front lens group, a diaphragm element and a rear lens group from an object space to an image space, wherein the front lens group has positive focal power; the rear lens group has positive focal power; the front lens group sequentially comprises a crescent first lens and a double-convex second lens from the object space to the image space; the crescent first lens has negative focal power; a concave surface of the crescent first lens faces the image space; the double-convex second lens has positive focal power; the rear lens group sequentially comprises a double-concave third lens, a crescent fourth lens and a balsaming lens; the double-concave third lens has negative focal power; the crescent fourth lens has positive focal power; a concave surface of the crescent fourth lens faces the object space; the balsaming lens consists of a fifth lens and the sixth lens. The requirements of high pixel, small distortion, large aperture, high light transmitting performance and accordance with high definition are met under the conditions of low cost and small miniaturization are realized; various aberrations of an optical system are effectively corrected; meanwhile, perfect imaging definition can be kept in the temperature of -40DEGC to 85DEG C; the optical lens is specially suitable for monitoring or vehicle-mounted camera systems considering daytime and nighttime or poor illuminating conditions.

The utility model provides an optical imaging camera lens, it includes first lens, wherein these first lens have negative optical power, second lens, wherein these second lens have positive refractive power, third lens, fourth lens, wherein an achromatic lens group is formed with these fourth lens to these third lens, with one the 5th lens, wherein the 5th lens have positive refractive power, and the 5th lens have at least one aspheric surface.

The invention discloses a monitoring zoom lens and a video camera with the zoom lens. The monitoring zoom lens includes: a front fixed group lens; a rear fixed group lens; a diaphragm, which is arranged between the front fixed group lens and the rear fixed group lens; a zoom group lens, which is movably arranged on the lens and located between the front fixed lens group and the diaphragm; and a focusing group lens, which is movably arranged in the lens and located behind the diaphragm and the rear fixed group lens, wherein the monitor The maximum aperture of the zoom lens when used at the maximum focal length end is the same as its maximum aperture when used at the minimum focal length end; and the maximum aperture of the monitored zoom lens when used at the intermediate focal length segment is the same as the maximum aperture when used at the minimum focal length end same. The beneficial effect of the present invention is that the maximum aperture of the lens will not be reduced when the lens is used at any focal length; compared with other lenses, the camera used with this lens has a better low-light effect.