13 results about "Prime lens" patented technology

The invention provides a prime lens. The prime lens comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with focal power, a fourth lens with positive focal power, a fifth lens with focal power, a sixth lens with focal power and a seventh lens with focal power which are sequentially arranged from the object space to the image space along the optical axis. The first lens has focal power, the second lens has focal power, the eighth lens has focal power, the ninth lens has positive focal power, the prime lens comprises five glass spherical lenses and four plastic aspheric lenses, the second lens, the third lens or the seventh lens, and the eighth lens and the ninth lens are plastic aspheric lenses. The aperture of the prime lens provided by the invention is 0.864, the maximum field angle is 140.24 degrees, the imaging target surface phi is greater than or equal to 9.2 mm, the prime lens can be matched with a 1 / 1.8 inch chip, and the requirements of large aperture and large field angle are met.

The invention discloses a relay optical system and a lens device.The relay optical system is used for being detachably installed on a prime lens and is provided with an object side and an image side which are correspondingly arranged in the optical axis direction. The relay optical system comprises a first lens, a second lens, a third lens, a fourth lens and an image plane which are sequentially arranged from an object side to an image side, and the relay optical system meets the following conditions:-70mlt; f1lt; the thickness is-10 mm, and the thickness is-150 mmlt; f2lt; f2lt; the thickness is-90 mm, and the thickness is 100 mmlt; f3lt; f3t; the thickness is 150 mm, and the thickness is 30 mlt; f4lt; f4t; the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, and the focal length of the fourth lens is f4. Through the arrangement, the shooting complexity and time cost are effectively reduced, and meanwhile, the overall investment cost is also reduced. And the size of the relay optical system is reduced, and the weight of the relay optical system is reduced, so that the relay optical system is convenient to carry.

The utility model discloses a prime lens which comprises three lens groups. The first lens group with the positive focal power comprises a meniscus positive lens, a pair of doublet lenses with a cemented surface approximate to a plane and another meniscus positive lens, and the distance between the central axes of the last two lenses is less than 1.0 mm. The movable second lens group is only provided with one negative lens, and the absolute value of the focal length is 0.7 time of the total focal length of the prime lens. And the third lens group with the positive focal power comprises a pair of doublet lenses, a biconvex spherical positive lens, a biconcave spherical negative lens, another pair of doublet lenses and a meniscus negative lens. The prime lens can be used for a full-frame camera, does not contain an aspheric surface, and is low in cost.

The invention discloses a prime lens. The prime lens comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with focal power and a seventh lens with positive focal power which are sequentially arranged from an object side to an image side along an optical axis, an eighth lens with negative focal power, a ninth lens with positive focal power and a tenth lens with focal power; the first lens, the fourth lens, the eighth lens and the ninth lens are glass spherical lenses, the third lens and the seventh lens are glass aspheric lenses, and the second lens, the fifth lens, the sixth lens and the tenth lens are plastic aspheric lenses. According to the scheme, on the premise that it is ensured that the prime lens has the small size and the large field angle, the prime lens can be suitable for high and low temperature environments, and the prime lens has more application scenes.

The invention discloses an optical system of a large-aperture half-frame prime lens, the optical system comprises a first objective lens group, an aperture diaphragm, a second objective lens group and a third objective lens group, the first objective lens group, the second objective lens group and the third objective lens group are sequentially arranged from an object side to an image side along an optical axis direction, the aperture diaphragm is located in the first objective lens group, and the aperture diaphragm is located in the third objective lens group. In the focusing process, the second objective lens group moves towards the image side along the optical axis, and the first objective lens group, the aperture diaphragm and the third objective lens group remain unchanged relative to the image plane position. According to the optical system, the positive focal power and the negative focal power of all the lens groups and the proportion of the combined focal length of all the lens groups to the combined focal length of the whole lens are set; the purposes of optimizing refraction and convergence of light, balancing aberration and improving imaging quality are achieved, and the lens is further made to achieve high image quality.

The utility model belongs to the technical field of lenses, and discloses a detachable prime lens and a mobile phone. The detachable prime lens comprises a front group, a rear group, a transmission member, a rotation driving assembly and a linear driving assembly. Wherein the front group is fixedly connected with the transmission part, the transmission part can rotate around the axis of the transmission part and ascend and descend along the axis of the transmission part, the rotation driving assembly is used for driving the transmission part to rotate, and the linear driving assembly is used for driving the transmission part to ascend and descend. The front group and the rear group are arranged to be two split parts, so that when the rotary driving assembly can drive the transmission part to rotate and the linear driving assembly drives the transmission part to ascend and descend, the transmission part can drive the front group to rotate and ascend and descend. According to the detachable prime lens, the front group and the rear group are coaxial to meet shooting requirements when the detachable prime lens is in a working state, and the front group and the rear group can be separated when the detachable prime lens is in a non-working state, and the front group descends to meet the purpose of reducing the overall thickness.

The application discloses an inner focusing wide-angle fixed-focus lens, and relates to the technical field of fixed-focus lenses. The inner focusing wide-angle fixed-focus lens comprises, in sequence from an object side to an image side, a first lens group with negative refractive power, a second lens group with positive refractive power, a third lens group with positive refractive power, a fourth lens group with positive refractive power, and a fifth lens group with negative refractive power. In a focusing process, the fourth lens group moves along an optical axis, and the first lens group, the second lens group, the third lens group and the fifth lens group remain unchanged relative to the position of an image surface. While realizing a large aperture, the inner focusing wide-angle fixed-focus lens has a small number of lenses and a compact structure.

The invention relates to the technical field of optical imaging and image processing, and particularly discloses a fast target tracking shooting system based on multiple prime lenses, which comprises a plurality of independent prime lenses physically arranged side by side, a high-speed image processing unit, a precise holder and a central control unit. Through parallel processing of multiple paths of video streams, target tracking and state prediction are carried out under a unified global coordinate system, and based on a prediction result, a preferred lens is directly switched and a pre-stored focusing parameter is called, so that instantaneous and unfuzzy switching and full-time clear imaging of a field of view and a focal length are realized; and the response speed, the stability and the imaging quality of high-speed target tracking are remarkably improved.

The utility model discloses a prime lens which comprises three lens groups. The first lens group with the positive focal power sequentially comprises two meniscus positive lenses, a meniscus negative lens and a set of triple cemented positive lenses, and an object side lens of the triple cemented positive lenses is an ultra-low dispersion convex lens. The second lens group with the negative focal power is configured to be a negative lens and can move along the central axis during focusing, and the focal length absolute value of the second lens group is 0.6 times that of the prime lens. And the third lens group with the positive focal power sequentially comprises a pair of doublet negative lenses, a piece of double-convex spherical positive lens and the other pair of doublet negative lenses. The prime lens does not contain an aspherical lens, is compact in structure and low in focusing power consumption, can be adaptive to a large aperture, and is suitable for a single-electric camera.

The invention discloses a prime lens and a camera, and relates to the technical field of prime lenses, the prime lens is provided with an object side and an image side which are oppositely arranged along the optical axis direction, the prime lens comprises a first lens group, a second lens group, a third lens group and a fourth lens group, the first lens group, the second lens group and the third lens group are sequentially arranged from the object side to the image side, and the three lens groups comprise eleven lenses. The first lens, the second lens, the third lens, the sixth lens, the seventh lens, the eighth lens and the ninth lens have positive focal power; the fourth lens, the fifth lens, the tenth lens and the eleventh lens have negative focal power; wherein the second lens group is movably arranged along the extension direction of the optical axis and is used for focusing, so that the aperture number of the prime lens is adjustable in a range less than or equal to 1.45, the change range of a field angle is less than or equal to 5% of an initial field angle, and the distortion degree of the prime lens is less than 3%. By arranging the eleven lenses, permutation and combination of the lenses and design of the lenses, the technical effects of large aperture and stable imaging are achieved.

The invention provides a parameter determination system and method for a laser collimating mirror, and relates to the field of laser collimating mirrors. The system comprises a zoom adjustment module and a focal length determination module, wherein the zoom adjustment module comprises a fiber laser, a zoom lens, a shearing interferometer, a CCD camera and a spectroscope; the zoom lens and the spectroscope are sequentially arranged on an emergent light path of the optical fiber laser, and the spectroscope partially transmits and partially reflects so as to split emergent light of the zoom lens into first split light and second split light; the first split light enters the shearing interferometer; the second split light enters the CCD camera; the focal length determination module is used for measuring the focal length of the adjusted zoom lens. According to the system, aiming at lasers with different core diameters or powers, high-precision control of the sizes of collimated light spots is realized; in addition, the system is also convenient for manufacturing a prime lens with relatively small allowance in a later period, and light weight and miniaturization of the system are ensured.

The invention discloses a prime lens which is characterized in that the prime lens sequentially comprises a first lens with negative focal power from an object side to an image side along an optical axis, a second lens with negative focal power, a third lens with negative focal power and a fourth lens with negative focal power from the object side to the image side, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a concave surface or a convex surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; 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; 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; 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 object side surface of the eighth lens is a convex surface, and the image side surface of the eighth lens is a convex surface; the number of the lenses with focal power in the prime lens is eight; the prime lens satisfies the following conditional expressions:-21.211 < = R11 / F < =-11.201; wherein R11 is the curvature radius value of the object side surface of the first lens, and F is the total effective focal length value of the prime lens.

The invention provides a lens and photographic equipment, the lens comprises a first lens group with positive focal power, a second lens group with positive focal power, a diaphragm and a third lens group with positive focal power from an object side to an image side, and the second lens group, the diaphragm and the third lens group can move by the same displacement relative to the first lens group along an optical axis direction. The focusing device is used for realizing focusing under different object distances; at least part of the lens between the object side and the diaphragm and at least part of the lens between the diaphragm and the image side form a double-Gaussian structure. According to the lens provided by the invention, the focusing requirement can be met, the aberration of the lens can be comprehensively reduced, the overall performance of the lens is improved, and the improvement effect is particularly obvious for a large-light-circle prime lens which is easy to generate large aberration.