648 results about "Negative refraction" patented technology

The zoom lens consists of, in order from the object side, a first lens group that has a negative refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. During zooming, in each lens group, distances between the adjacent groups in the direction of the optical axis are changed. The first lens group consists of, in order from the object side, a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The third lens group consists of a negative lens. During focusing, only the third lens group moves along the optical axis. The zoom lens satisfies predetermined conditional expressions.

An optical imaging system includes a first lens having a negative refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power. At least five of the lenses are made of a plastic material.

An imaging lens system includes a first lens, a second lens, a third lens having negative refractive power, a fourth lens, a fifth lens, and a sixth lens, disposed in order from an object side in a direction of an imaging plane, wherein one or more of the first to sixth lenses has a refractive index of 1.8 or greater, and has a refractive index temperature coefficient (10−6 / ° C.) of 3 or greater.

An optical system for a vehicle disclosed in an embodiment of the invention includes a first lens, a second lens, a third lens, and a fourth lens disposed along an optical axis from an object side toward a sensor side, the first lens includes an object-side first surface and a sensor-side second surface on the optical axis, the second lens includes an object-side third surface and a sensor-side fourth surface, the third lens includes an object-side fifth surface and a sensor-side sixth surface, the fourth lens includes an object-side seventh surface and a sensor-side eighth surface, the first lens has a negative refractive power, the third lens has a positive refractive power, the fourth lens has a negative refractive power, the first lens and the fourth lens include a plastic material, and the third lens comprises a glass material.

The present disclosure relates to the field of optical lens, and discloses a camera optical lens, including from an object side to an image side: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power; and the following relational expressions are satisfied: −0.300≤Sin(A1.0out14)*R14 / f7≤0.003; 1.05≤(f1+f2+f3+f4) / (f5+f6+f7)≤2.30; −1.40≤Sin(A0.8out8)*R8 / f4≤0.10. The camera optical lens according to the present disclosure has excellent optical characteristics of sufficient aberration correction, large aperture, wide-angle, ultra-thin, diversified structural design, and high sensor matching, and is particularly suitable for a mobile phone camera lens assembly and a WEB camera lens which are composed of camera elements such as CCD, CMOS with high definition and a vehicle-mounted lens.

An information handling system camera provides a 117 degree field of view with low distortion by capturing visual images through a lens having eight lens elements. The first lens element closest to the object, the third lens element and the sixth lens element each have a glass material, the remaining lens elements have a plastic material. The first two lens elements and the last lens element each have a negative refractive power and the remaining lens elements have a positive refractive power. Lens elements two and four through eight each have aspherical surfaces.

An optical imaging lens assembly. The optical imaging lens assembly includes a lens cone, and a lens group and a spacing element group, which are arranged in the lens cone. The lens group sequentially includes from an object side to an image side along an optical axis: a first lens with a negative refractive power, a second lens with a refractive power, a third lens with a refractive power, a fourth lens with a refractive power, a fifth lens with a refractive power and a sixth lens with a negative refractive power. Image-side surfaces of the second lens, the third lens and the fifth lens are all convex surfaces. An object-side and image-side surface of the fourth lens are both convex or concave surfaces. The spacing element group includes a first spacing element. The optical imaging lens assembly satisfies: −3.45<R1 / f<2.75 and 0.75<2×Yc11 / d1s<1.25.

An imaging optical system includes, in order from an object side to an image side, a first lens group, a second lens group, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a negative refractive power, in which, when focusing from an infinite distance object to a close distance object, the first lens group remains stationary with respect to an image surface, the second lens group moves to the object side along an optical axis, the third lens group remains stationary with respect to the image surface, the fourth lens group moves to the object side along the optical axis, and the fifth lens group remains stationary with respect to the image surface, the imaging optical system includes an aperture diaphragm, and the imaging optical system satisfies a predetermined conditional expression.

An optical system according to an embodiment of the present invention includes an aperture, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens which are sequentially arranged from an object side to an image side, wherein the first lens has positive refractive power, the second lens has negative refractive power, the third lens has positive refractive power, the fourth lens has positive refractive power, and the fifth lens has negative refractive power. Both the object-side and image-side surfaces of the fifth lens have an asymmetric circular shape.

An image capturing optical system includes seven lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each of the seven lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The third lens element has negative refractive power. The object-side surface of the fifth lens element is concave in a paraxial region thereof. The sixth lens element has positive refractive power. The seventh lens element with negative refractive power has the object-side surface being convex in a paraxial region thereof and the image-side surface being concave in a paraxial region thereof and having at least one inflection point.

To provide an image-forming optical system that achieves both of a high image-forming performance and miniaturization / reduced weight while having a large aperture ratio, has a light focus lens group, and suppresses bleeding at the time of focusing.SOLUTION: An image-forming optical system consists of a first lens group, a second lens group, 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 order from the object side to the image side, the first lens group is immobile relative to an image surface at the time of focusing from an object at infinity to a near-distance object, the second lens group travels to an object side along a light axis, the third lens group is immobile relative to an image surface, the fourth lens group travels to an object side along the light axis, the fifth lens group is immobile relative to an image surface, an aperture diaphragm is provided between a lens surface in the furthest image side of the second lens group and a lens surface in the furthest object side of the fourth lens group, and a predetermined conditional expression is satisfied.SELECTED DRAWING: Figure 1

An optical imaging system includes a first lens having a negative refractive power, a convex object-side surface, and a concave image-side surface; a second lens having a positive refractive power; a third lens having a negative refractive power; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power; and a sixth lens having a positive refractive power and an image-side surface having an inflection point. The first to sixth lenses are sequentially disposed in ascending numerical order from an object side of the optical imaging system toward an imaging plane of the optical imaging system.

The present disclosure relates to the field of optical lenses, and discloses a camera optical lens sequentially including seven lenses from an object side to an image side: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power; and the following relational expressions are satisfied:0.9≤d⁢11.5 / d⁢131.5≤1.7;⁢1.≤(d⁢31.5+d⁢51.5+d⁢71.5) / (d⁢91.5+d⁢111.5)≤1.8;⁢1.1≤d⁢1⁢31.5 / d⁢13≤2.0⁢0.The camera optical lens has excellent optical characteristics of good processibility, ultra-thin, and is particularly suitable for a mobile phone camera lens component and a WEB camera lens which are composed of camera elements such as CCD, CMOS with high definition and a vehicle-mounted lens.

This variable magnification optical system is configured to include, in order from an object side: a front group which includes at least one lens group having negative refractive power; and a rear group which includes a plurality of lens groups and has positive refractive power as a whole, and in which a lens group arranged closest to the object side among the plurality of lens groups is a rear-side first lens group having positive refractive power, wherein during variable magnification, a front-side first lens group arranged closest to the object side among the at least one lens group of the front group is fixed to an image surface, and an interval between adjacent lens groups changes, thereby satisfying the following conditional expression.　0.01<(-fGFw) / fGR1<0.83, where fGFw is the focal length of the front group at the wide-angle end, and fGR1 is the focal length of the rear-side first lens group.

The present disclosure relates to the field of optical lenses, and discloses a camera optical lens. The camera optical lens sequentially includes seven lenses from an object-side surface to an image side: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power; and the following relational expressions are satisfied: 0.20≤H0.6r9 / IH≤0.30; 16.00≤f1 / H0.6r1*tan(semi-FOV)≤30.00; −6.00≤(H0.6r14 / d13)*(f7 / f)≤−3.00. The camera optical lens has excellent imaging performance, meets the design requirements of wide-angle, low sensitivity, good processability, miniaturization and sufficient correction of aberration, and is particularly suitable for a mobile phone camera lens assembly composed of camera elements such as CCD CMOS with high definition, a WEB camera lens assembly and a vehicle-mounted lens assembly.

To provide a compact, high-performance catadioptric optical system. [Solution] The optical system comprises, in order of light passage from the object side, a primary mirror section consisting of an aspherical concave mirror with its concave surface facing the object side, a secondary mirror section arranged on the object side of the primary mirror section and consisting of an aspherical convex mirror with its convex surface facing the image side, and a refractive system arranged on the image side of the secondary mirror section, the refractive system comprising a front group with positive refractive power and a rear group with negative refractive power separated by a maximum air gap, the refractive system comprising at least five lenses, where PG is the Petzval sum of the refractive system obtained by normalizing the focal length of each surface by the focal length of the entire system, and PM is the Petzval sum of the reflective system obtained by normalizing the focal length of each surface by the focal length of the entire system, 0.6<|PG / PM|<1.2…(1) If the refractive power of the refractive system is φG and the refractive power of the entire system is φ0, then 0.05<|φG / φ0|<1.5…(2) 7 <PM<20…(3) It is characterized by satisfying the conditions (1), (2), and (3).

A camera optical lens sequentially includes seven lenses: a first lens having negative refractive power, a second lens having negative refractive power, a third lens having refractive power, a fourth lens having positive refractive power, a fifth lens having positive refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power. Following relational expressions are satisfied: 1.50≤f4 / f5≤3.40; 0.90≤R5 / R6≤1.40; 170≤FOV / Fno≤200. The camera optical lens according to the present disclosure has excellent optical characteristics of sufficient aberration correction, large aperture, wide-angle and ultra-thinness, and is particularly suitable for a mobile phone camera lens assembly and a WEB camera lens which are composed of camera elements such as CCD, CMOS with high definition, and a vehicle-mounted lens.

An optical system comprises a first lens group having positive refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power, arranged in order from an object side. When focusing, the second lens group moves along an optical axis. The optical system satisfies the following conditional expression0.30<{1−(β2)2}×(β3)2<2.00where β2 is a lateral magnification of the second lens group for a state of focusing on infinity, andβ3 is a lateral magnification of the third lens group.

This invention provides an optical glass, its preparation method, and an optical element. The optical glass contains the following components in molar percentage: B₂O₃: 5.0%–19.9%; SiO₂: 5.0%–28.0%; La₂O₃: 0.05%–11.5%; Gd₂O₃: 0%–10.0%; Y₂O₃: 3.6%–15.0%; ZnO: 22.5%–60.0%; the refractive index n of the optical glass is... d An Abbe number of υ is above 1.78. d The temperature coefficient of refractive index is 35-45. The optical glass of this invention has a large positive temperature coefficient of refractive index. When used in combination with optical glass having a negative temperature coefficient of refractive index, it can effectively correct temperature drift caused by rapid temperature changes or high-temperature environments, fix the focus, and maintain clear imaging. It is suitable for vehicle-mounted cameras or projectors, copiers, laser printers, and playback devices that generate a lot of heat during use.

To provide a zoom lens that has a large aperture and high optical performance despite its small size and wide angle.SOLUTION: A zoom lens has a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a rear group, which are arranged in order from an object side to an image side, and an interval between the adjacent lens groups changes in zooming. The first lens group includes at least one resin lens having a negative refractive power, and at least one of the second lens group and the rear group includes at least one resin lens having a positive refractive power. A focal length of the first lens group, a focal length of the second lens group, an average of the focal lengths of the resin lenses having a negative refractive power included in the first lens group, and an average of the focal lengths of the resin lenses having a positive refractive power included in at least one of the second lens group and the rear group are each appropriately set.SELECTED DRAWING: Figure 1

An optical imaging system includes 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, a tenth lens, and an eleventh lens sequentially arranged in order along an optical axis from an object side of the optical imaging system toward an imaging surface of the optical imaging system, wherein the first lens has a positive refractive power, the second lens has a negative refractive power, at least two lenses sequentially arranged along the optical axis among the first lens to the fourth lens have an Abbe number of less than 38, and TTL / (2×IMG HT)<0.660 is satisfied, where TTL is a distance along the optical axis from an object-side surface of the first lens to the imaging surface, and IMG HT is one half of a diagonal length of the imaging surface.

An optical system according to an embodiment of the present invention includes first to fifth lens groups disposed along an optical axis, wherein the first lens group has positive (+) refractive power, the second lens group has negative (-) refractive power, the third lens group has positive (+) refractive power, the fourth lens group has negative (-) refractive power, the fifth lens group has positive (+) refractive power, the first lens group includes a prism lens, the first lens group, the second lens group, and the fifth lens group are fixed groups, and the third lens group and the fourth lens group are moving groups.

Optical lens assembly for photography comprising eight lens elements (E1, E2, E3, E4, E5, E6, E7, E8), wherein the eight lens elements (E1, E2, E3, E4, E5, E6, E7, E8) are arranged in the order from an object side to an image side along a ray path as a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5), a sixth lens element (E6), a seventh lens element (E7) and an eighth lens element (E8), and wherein each of the eight lens elements (E1, E2, E3, E4, E5, E6, E7, E8) has an object-side surface facing the object side and an image-side surface facing the image side; wherein the first lens element (E1) has a negative refractive power, the image-side surface of the second lens element (E2) is concave in a paraxial region thereof, the image-side surface of the fourth lens element (E4) is convex in a paraxial region thereof, the fifth lens element (E5) has a positive refractive power, the object-side surface of the fifth lens element (E5) is convex in a paraxial region thereof, the image-side surface of the fifth lens element (E5) is convex in a paraxial region thereof, the sixth lens element (E6) has a negative refractive power, the image-side surface of the sixth lens element (E6) is concave in a paraxial region thereof, the seventh lens element (E7) has a positive refractive power, the image-side surface of the eighth lens element (E8) is concave in a paraxial region thereof, and the image-side surface of the eighth lens element (E8) has at least one inflection point (P);; where the radius of curvature of the object-side surface of the sixth lens element (E6) is R11, the radius of curvature of the image-side surface of the sixth lens element (E6) is R12, the axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG), measured at a reference wavelength of the d-line, is TLd, the maximum image height of the optical lens assembly for photography is ImgH, the focal length of the optical lens assembly for photography, measured at the reference wavelength of the d-line, is fd, the central thickness of the first lens element (E1) is CT1, the central thickness of the third lens element (E3) is CT3, the central thickness of the seventh lens element (E7) is CT7, the axial distance between the second lens element (E2) and the third lens element (E3) is T23, and the following conditions are met: 0 < (R 11 + R 12 ) / ( R 11 − R 12 ) < 1.50 ; 4,00 < TLd / ImgH < 6,50 ; 6,00 < TLd / fd < 12,00 ; 0,10 < CT 1 / CT 7 < 0,80 ; und 0,60 < T 23 / CT 3 < 2,00.

The present invention discloses a camera optical lens with seven-piece lenses including, from an object side to an image side in sequence, a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, a fifth lens having a negative refractive power, a sixth lens having a positive refractive power and a seventh lens having a negative refractive power; wherein the camera optical lens satisfies the following conditions: 20.00≤R7 / d7≤40.00, −20.00≤R13 / d13≤−5.00, and 4.00≤d1 / d2≤15.00. The camera optical lens according to the present invention has excellent optical characteristics, such as large aperture, wide-angle, and ultra-thin.

A camera optical lens includes from an object side to an image side: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having positive refractive power, and a fourth lens having negative refractive power; and following relational expressions are satisfied: 0.65≤f1 / f≤0.85; −1.50≤(f3−f4) / f2≤−0.80; 0.20≤(R3+R4) / f2≤0.80; 2.00≤d1 / d3≤7.00; and −3.50≤f234 / (d3+d5+d7)≤−2.50. The camera optical lens has excellent optical performance and is particularly suitable for a mobile phone camera lens assembly, and a WEB camera lens composed of camera elements such as CCD, CMOS for high pixels.

An optical imaging system includes a first lens having a refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, a fifth lens having a refractive power, and a sixth lens having a refractive power sequentially disposed in ascending numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, wherein the conditional conditions 0.85≤TTL / f≤1.0 and 0.5≤f1 / f≤1 are satisfied, where TTL is a distance along the optical axis from an object-side surface of the first lens to the imaging plane, f is a total focal length of the optical imaging system, and f1 is a focal length of the first lens.

A virtual image display device or an optical unit includes a display configured to emit video light, and a polarization-selective lens that is disposed facing the display and that has a refractive power that selectively acts on polarized light of the video light. The polarization-selective lens includes, in order from a display side, a polarizing diffractive lens having a positive refractive power with respect to the video light that is circularly polarized light and having a negative refractive power with respect to external light that is circularly polarized light, and an auxiliary lens having a positive refractive power equivalent to a refractive power of the polarizing diffractive lens.

Disclosed is a photographing lens assembly. The photographing lens assembly includes a lens barrel and a six-piece lens group and a spacer group that are arranged in the lens barrel; the six-piece lens group includes a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, a fifth lens having a positive refractive power, and a sixth lens having a negative refractive power that are arranged in sequence from an object side to an image side along an optical axis; the spacer group includes a fourth spacer and a fifth spacer; and the photographing lens assembly satisfies: 2.7<f / (f5+f6)<−1.2, −2.0<f1 / f3<−1.7, 0.5<(EP45+CP5) / (CT5+T45)<1.4, and 2.2<CT5 / EP45<3.4 photographing lens assembly.

Disclosed is a camera optical lens. The camera optical lens includes from an object side to an image side in sequence: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power; a sixth lens having a negative refractive power; wherein the camera lens satisfies the following conditions: 2.00≤f3 / f≤6.00; −2.00≤f5 / f6≤−0.79; −5.00≤R7 / R8≤−1.00; −0.90≤R9 / R10≤−0.20; 0.25≤d2 / d3≤1.00. The camera optical lens has good optical performance, and can meet the design requirements for large aperture, wide-angle and ultra-thin.

A zoom lens comprises a first lens unit having positive refractive power, a second lens unit having negative refractive power, and a rear lens group including one or more lens units. The first lens unit, the second lens unit, the rear lens group are arranged in order from an object side to an image side. Intervals between adjacent lens units change during zooming. The first lens unit is configured to move toward the object side during zooming from a wide angle end to a telephoto end. The second lens unit includes three or more lenses. The zoom lens satisfies predetermined inequalities.