38 results about "Prime lens" patented technology

The utility model discloses a prime lens comprising a front lens group, a diaphragm and a rear lens group which are arranged from an object plane to an image plane along an optical axis. The front lens group comprises a first lens, a second lens and a third lens which are sequentially arranged from the object plane to the image plane, the focal power of the first lens is negative, the focal power of the second lens is negative, and the focal power of the third lens is positive; the focal power of the rear lens group is positive, and the rear lens group comprises a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from the object plane to the image plane, the focal power of the fourth lens is positive, the focal power of the fifth lens is negative, the focal power of the sixth lens is positive, the focal power of the seventh lens is negative, and the focal power of the eighth lens is positive; the focal power of the front lens group is phi front, the focal power of the rear lens group is phi rear, and the focal power of the prime lens is phi; wherein-0.085 < = phi front / phi < = 0.25, and 0.35 < = phi rear / phi < = 0.48. Through the lens group and the focal power distribution of each lens, the design of a large-aperture and large-target-surface prime lens can be realized.

The embodiment of the utility model discloses an ultra-wide-angle and ultra-short-focus full-width camera lens, which comprises sixteen lenses which are sequentially arranged from an object space to an image space along an optical axis, and each lens has corresponding focal power; besides, a diaphragm is arranged between the eighth lens and the ninth lens to divide the sixteen lenses into two lens groups, namely a first lens group with negative total focal power and a second lens group with positive total focal power. According to the full-frame prime lens provided by the embodiment of the utility model, by using the optical structure of the 14 glass spherical lenses and the 2 glass aspherical lenses, when the full field angle is greater than or equal to 132 degrees, the distortion is small, and the purple edge phenomenon is improved. Besides, by adding the aspherical lens, the image quality of an edge field of view is also obviously improved under an ultra-short focal length, clear imaging can be realized, and the shooting feeling of almost zero distortion is achieved.

The utility model discloses a prime lens and monitoring equipment. The prime lens comprises a convex-concave first lens with positive focal power, a field diaphragm, a second lens with negative focal power, a third lens with positive focal power, a convex-convex fourth lens with positive focal power, a concave-concave fifth lens with negative focal power and a sixth lens with positive focal power which are sequentially arranged from an object space to an image space along an optical axis, the vignetting diaphragm comprises a convex seventh lens with positive focal power and a concave eighth lens with negative focal power; the image side surface of the second lens is a concave surface, the object side surface of the third lens is a convex surface, the image side surface of the sixth lens is a convex surface, the second lens and the third lens are cemented into a first cemented lens, and the fourth lens and the fifth lens are cemented into a second cemented lens. And high resolution performance is achieved in visible light and near-infrared bands.

The invention provides a wide-angle prime lens, and relates to the technical field of optical lenses. The wide-angle prime lens provided by the embodiment of the invention comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are sequentially arranged from an object space to an image space along an optical axis, the first lens and the second lens have negative focal power; the third lens and the fourth lens have positive focal power; the wide-angle prime lens further comprises a diaphragm, and the diaphragm is located between the third lens and the fourth lens. The embodiment of the invention provides a wide-angle prime lens, so as to realize the wide-angle prime lens with small aperture and high image quality.

The prime lens comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with negative focal power and a fourth lens with positive focal power which are arranged from an object plane to an image plane along an optical axis, the object-side surface of the first lens is a convex surface, and the image-side surface is a concave surface. The object side surface of the second lens is a convex surface, and the image side surface is a concave surface; the object side surface of the third lens is a concave surface, and the image side surface is a convex surface; the fourth lens element has a convex object-side surface and a convex image-side surface. According to the technical scheme, the arrangement of the four lenses ensures that the number of the lenses in the prime lens is small, and the realization of small size and low cost is facilitated; and an M12 interface can be adopted, so that the cost can be further reduced. Furthermore, the focal power of the first lens and the third lens is negative, the focal power of the second lens and the fourth lens is positive, and the good imaging effect of the optical system can be ensured by reasonably distributing the focal power of each lens in the optical system.

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 an optical system of a large-aperture full-frame prime lens, which belongs to the technical field of optical lens manufacturing, and comprises a first objective lens group G1, a second objective lens group G2 and a third objective lens group G3 which are sequentially arranged from an object side to an image side along an optical axis direction, and a radial diaphragm is positioned in the first objective lens group; in the focusing process, the second objective lens group G2 moves towards the image side along the optical axis, and the first objective lens group G1, the aperture diaphragm and the third objective lens group G3 remain unchanged relative to the position of the image plane. The optical system satisfies the following conditional expressions: 0.87 < = FG1 / F < = 1.25; 0.62 < = FG2 / F < = 0.98; 0.7 < = FG3 / F < = 1.2. The first objective lens group comprises four single lenses with positive focal power, a doublet lens with negative focal power, a single lens with negative focal power and an aperture diaphragm; and the third objective lens group comprises a single lens with positive focal power, a quadruple bonding lens and two lenses with negative focal power, wherein one lens is an aspheric lens. According to the invention, good imaging quality can be realized.

The utility model discloses a prime lens and machine vision equipment. The prime lens comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with focal power, a sixth lens with focal power and a seventh lens with positive focal power which are sequentially arranged from the object space to the image space. An eighth lens with positive focal power, a ninth lens with focal power and a tenth lens with focal power; wherein the fifth lens and the sixth lens are glued to form a first glued lens with negative focal power, and the ninth lens and the tenth lens are glued to form a second glued lens with positive focal power. The focal length of the prime lens is 16mm, the field angle is 39.4 degrees, the TV distortion of the lens is less than 0.04%, the optical distortion is less than 0.4%, and the lens can work stably at 10-50 DEG C.

The utility model provides a prime lens, and relates to the technical field of optical lenses. The prime lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from an object space to an image space along an optical axis; the first lens is a glass spherical lens with negative focal power, the second lens is a plastic aspheric lens with negative focal power, the third lens is a plastic aspheric lens with positive focal power, the fourth lens is a glass spherical lens with negative focal power, and the fifth lens is a plastic aspheric lens with positive focal power. The fifth lens is a glass spherical lens with positive focal power, the sixth lens is a plastic aspheric lens with positive focal power, the seventh lens is a plastic aspheric lens with negative focal power, and the eighth lens is a plastic aspheric lens with positive focal power. According to the embodiment of the utility model, the prime lens which has the advantages of wide angle, compact structure, high image quality, large target surface and excellent comprehensive performance is realized.

The embodiment of the utility model discloses an internal focusing type full-frame micro-single prime lens. The prime lens comprises four lens groups, and the focal power is negative, positive, negative and positive. The first lens group comprises five lenses with negative focal power, negative focal power, negative focal power, negative focal power and positive focal power, the second lens group comprises six lenses with positive focal power, negative focal power, positive focal power, positive focal power, positive focal power and negative focal power, the third lens group comprises one lens with negative focal power, and the fourth lens group comprises two lenses with positive focal power and negative focal power; the diaphragm is disposed between the second lens group and the third lens group. In conclusion, the focusing type prime lens design with the focal length being 24 mm, the imaging target surface being 43.2 mm and the F number being 2.0 can be achieved, and under the condition that the aperture is fully opened, MTF values of all view fields reach 0.6 or above at the spatial frequency being 30 lp / mm, and distortion is smaller than or equal to 1%. And the vertical axis chromatic aberration is corrected.

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 relates to the field of optics, in particular to a prime lens and an imaging device.The prime lens sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens, a fourth lens, a fifth lens with positive focal power, a sixth lens with positive focal power and a seventh lens with negative focal power from the object plane side to the image plane side, the system is composed of a first lens with positive focal power, an eighth lens with positive focal power, a ninth lens with negative focal power, a tenth lens with positive focal power and an eleventh lens with negative focal power. The prime lens satisfies the following conditional expressions: fno < 0.9; tTL / f is less than 12; wherein fno is the number of apertures of the prime lens, TTL is the total optical length of the prime lens, and f is the focal length of the prime lens. According to the prime lens, the aperture of the prime lens is greatly increased, the prime lens can be better used in a dark scene, and the size of the prime lens is reduced and miniaturization of the prime lens is realized due to the arrangement of the multiple groups of bonding lenses and the limitation of the total optical length.

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 prime lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from an object plane to an image plane along an optical axis, the first lens is a negative-focal-power biconcave lens, the second lens is a negative-focal-power concave-convex lens, the third lens is a positive-focal-power convex-concave lens, the fourth lens is a positive-focal-power lens, the image side face of the fourth lens is a convex face, the fifth lens is a positive-focal-power biconvex lens, the sixth lens is a negative-focal-power biconcave lens, and the seventh lens is a positive-focal-power biconvex lens. And the eighth lens is a convex-concave lens with negative focal power. According to the technical scheme, the prime lens comprises eight lenses, and the focal power and the surface type of each lens are reasonably distributed, so that the imaging quality of the optical system is improved, the prime lens is ensured to have a good imaging effect, the relative illumination between an edge image and a center image can be improved, and the imaging quality of the optical system is improved. And the imaging requirement of the security lens is met.

The utility model discloses a machine vision prime lens with an improved structure and a focal length of 12mm, which comprises a first lens, a second lens arranged on the right side of the first lens, a first diaphragm arranged on the right side of the second lens, a third lens arranged on the right side of the first diaphragm, a fourth lens arranged on the right side of the third lens, and a fifth lens arranged on the right side of the fourth lens. The fourth lens and the fifth lens are bonded through optical glue to form a gluing piece, the focal length of the first lens is fg1, the focal length of the gluing piece is fu4, the focal length of the lens is f, and the optical system meets the relational expression of 0.4 lt; fg1 / flt; 1, 1.3, 0.3 lt; fu4 / flt; and 0.8. The utility model has the advantages of novel design, simple structure, simple and convenient assembly, low cost, good optical performance, clear imaging and high resolution, and realizes the change of the object distance from 0.1 m to infinity.

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 utility model discloses a prime lens. The prime lens comprises a first lens to a ninth lens which are sequentially arranged from the object space to the image space along the optical axis. The first lens is a glass lens with negative focal power, the second lens is a plastic lens with negative focal power, the third lens is a plastic lens with positive focal power, the fourth lens is a glass lens with positive focal power, the fifth lens is a glass lens with positive focal power, the sixth lens is a glass lens with negative focal power, and the seventh lens is a glass lens with positive focal power. The eighth lens is a plastic lens with negative focal power, and the ninth lens is a plastic lens with positive focal power. The prime lens provided by the utility model adopts a 5G4P optical system structure, and by optimizing the shape and focal power of each lens and the relative position of each lens, the aperture number is 0.96-1.091, the total optical length is less than or equal to 22.5 mm, the maximum field angle is 161.28 degrees, and the requirements of large aperture, ultra-wide angle and infrared confocal are met.

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 utility model discloses a prime lens. The prime lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged along an optical axis from an object side to an image side, the first lens has negative focal power; the second lens has positive focal power; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has negative focal power; the sixth lens has positive focal power; the seventh lens has positive focal power; wherein the total length TTL of an optical system of the prime lens and the entrance pupil diameter ENPD meet the condition that TTL / ENPD is smaller than or equal to 13. By adopting the technical scheme, the prime lens has the characteristics of small volume and large aperture on the premise of ensuring that the prime lens has higher imaging resolution.

The utility model discloses a prime lens. The prime lens sequentially comprises a first lens group and a second lens group from an object side to an image side along an optical axis, the first lens group sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power and a fourth lens with positive focal power from the object side to the image side; the second lens group sequentially comprises a fifth lens with positive focal power, a sixth lens with positive focal power, a seventh lens with negative focal power and an eighth lens with positive focal power from the object side to the image side; wherein the object side surfaces of the first lens and the second lens are convex surfaces, and the image side surfaces are concave surfaces; the prime lens satisfies the following conditions: 2.5 < = fa / f < = 6 and-5.9 < = f * f1 * f4 / f67 < =-1.4, fa is the effective focal length of the first lens group, f is the total effective focal length of the prime lens, f1 is the effective focal length of the first lens, f4 is the effective focal length of the fourth lens, and f67 is the combined focal length of the sixth lens and the seventh lens.

The waterproof prime lens comprises a lens barrel and a plurality of lenses, the plurality of lenses comprise a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object space to an image space, a joint surface of the first lens and an annular boss is provided with a first sealing ring, and a joint surface of the second lens and the annular boss is provided with a second sealing ring. A second sealing ring is arranged on the joint face of the fourth lens and the annular bearing piece, sealing rings are arranged on the contact faces of the object side lens and the lens barrel and the contact faces of the image side lens and the lens barrel, so that a waterproof closed space is formed in the lens barrel between the first lens and the fourth lens, and the effect that the two ends are waterproof is achieved. Meanwhile, technological manufacturing and characteristics of materials used by the lens are fully researched from the design of a product, the problem of water mist generated by the inner concave surface of the lens in the lens is optimized, the imaging clear effect of the lens is effectively improved, and the application range is more diversified.

The utility model relates to a small-size high-illumination high-definition prime lens, which comprises a front lens group, a diaphragm group, a rear lens group and an imaging group which are sequentially arranged from an object side surface to an image side surface, the front lens group comprises a biconvex lens L1, a meniscus lens L2 and a biconcave lens L3; and the rear lens group comprises a meniscus lens L4 and a biconvex lens L5. The optical system is simple in structure and reasonable in design, has the advantages of small size, high illumination, high resolution and low distortion, can realize high-quality imaging in a wide working distance range, and further widens the application scene.

The invention provides a wide-angle prime lens, and relates to the technical field of optical lenses. The wide-angle prime lens provided by the embodiment of the invention comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are sequentially arranged from an object space to an image space along an optical axis, the fourth lens, the fifth lens and the eighth lens have positive focal power, and the seventh lens has negative focal power; the wide-angle prime lens further comprises a diaphragm, and the diaphragm is located between the fourth lens and the fifth lens. The embodiment of the invention provides a wide-angle prime lens, so as to realize the wide-angle prime lens with small aperture and high image quality.

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 utility model discloses a machine vision prime lens with a focal length of 25mm, which comprises a first lens, a second lens arranged on the right side of the first lens, a third lens arranged on the right side of the second lens, a fourth lens arranged on the right side of the third lens, a diaphragm arranged between the fourth lens and the third lens, and an imaging surface arranged on the right side of the fourth lens. The focal length of the first lens is G1, the focal length of the fourth lens is G4, the focal length of the lens is f, and the optical system meets the relational expression 0.7 lt; g1 / flt; 1, 1.1, 0.4 lt; g4 / flt; and 0.6. The utility model has the advantages of novel design, simple structure, simple and convenient assembly, low cost, good optical performance, clear imaging and high resolution, and can realize the change of the object distance from 0.1 m to infinity.

The utility model provides a vehicle-mounted high-uniformity zoom projection lens, and relates to the technical field of projection lenses. Comprising a first group lens, a second group lens, a diaphragm, a galvanometer, a light splitting device, protective glass and an image surface which are arranged in sequence, the image plane is used for emitting light, the protective glass is used for preventing dust from falling onto the image plane and the light splitting device, the galvanometer is used for adjusting imaging pixels, the light splitting device is used for splitting light beams, and the diaphragm is used for controlling the light inlet amount of light after beam splitting. The first group lens and the second group lens are both used for correcting aberration; according to the utility model, the problem that most projectors in the prior art are prime lenses and cannot meet different application scenes at the same time is solved.