984 results about "Conditional expression" patented technology

The invention discloses an optical lens and electronic equipment. The optical lens comprises a first lens, a second lens, a third lens and a seventh lens which are sequentially arranged from a first side to a second side along an optical axis, the first lens has negative focal power and is convex-concave in surface type, the second lens has negative focal power and is concave in first side surface, the third lens has positive focal power, and the first side surface of the fourth lens is convex; the fifth lens and the sixth lens are glued and have positive and negative focal powers; the lens satisfies the following conditional expressions: 0.03 < = (d5 + d6) / TTL < = 0.2, 2 < = F7 / F,-5 < = R4 / R5 < = 0.8,-25 < = F2 / F < =-2, 0.06 < = d45 / TTL < = 0.2, and TTL / F < = 4.5, where d5 and d6 are the center thickness of the fifth lens and the sixth lens respectively, TTL is the total optical length of the lens, F7 is the effective focal length of the seventh lens, F is the total effective focal length of the lens, R4 and R5 are the curvature radiuses of the second side surface of the second lens and the first side surface of the third lens respectively, F2 is the effective focal length of the second lens, and d45 is the effective focal length of the third lens. And d45 is an air interval between the fourth lens and the fifth lens.

The invention discloses a human resource data natural language query and SQL generation method and system, and relates to the technical field of SQL generation, and the method comprises the steps: preprocessing a natural language query text input by a user, and constructing a query semantic tree; traversing the query semantic tree to generate a candidate entity set, determining an unambiguous entity through a three-layer ambiguity resolution mechanism of semantic scoring, service verification and cross validation, identifying a composite intention, disassembling the composite intention into a sub-intention sequence, and generating an SQL operation instruction set in combination with a preset SQL operation mapping rule; based on the SQL operation instruction set and the human resource data association model, determining a data table set and an association path, generating a dynamic calculation logic and structured condition expression, and constructing a structured query skeleton; according to the method, the personalized SQL template is dynamically generated according to the query skeleton, after filling, grammar verification, strategy optimization and logic consistency verification are performed, and the optimized SQL statement is output, so that the query accuracy and performance are remarkably improved.

The present application relates to the technical field of electric digital data processing, and provides a data preparation method, system, and device for AIGC-based interaction analysis, and a medium. The method comprises: by means of a pre-trained text label recognition model, determining a label sequence corresponding to an interaction statement having experienced first word segmentation processing; on the basis of a preset expression construction rule, determining a label combination sequence corresponding to the label sequence and a conditional expression corresponding to the label combination sequence; by means of a preconfigured database candidate text dictionary and a preset matching rule, determining a strictly matched keyword and a fuzzily matched keyword corresponding to the interaction statement having experienced second word segmentation processing; on the basis of the strictly matched keyword and a similar candidate text corresponding to the fuzzily matched keyword, determining a word segmentation result corresponding to the second word segmentation processing; on the basis of a plurality of preset SQL statement rule matching templates, generating an interaction SQL query statement, so as to determine, on the basis of the interaction SQL query statement, interaction response information corresponding to the interaction statement.

An image formation lens (IL) for a microscope comprises: a negative lens; and a positive lens (L13) that satisfies the following conditional expression:-0.002×(ν⁢dP-35)+0.602-θ⁢gFP<023<ν⁢dP<65where vdP: an Abbe number of the positive lens, and θgFP: a partial dispersion ratio of the positive lens that is defined by the following expression: θgFP=(ngP−nFP) / (nFP−nCP) where ngP is a refractive index of the positive lens to a g-line, nFP is a refractive index of the positive lens to an F-line, and nCP is a refractive index of the positive lens to a C-line.

The invention discloses a complex SQL query dynamic rewriting method based on AST and a server, and relates to the field of data rewrite.The method comprises the steps that in response to a received target database type, an original SQL query statement is analyzed into AST; an SQL processor is initialized; recursively traversing a selection statement structure of the main query, and recursively traversing a sub-query structure nested in the selection statement structure; recursively traversing each selected statement structure in the joint query; recursively traversing conditional expressions in the updated statements, the deleted statements and the inserted statements or nesting and selecting statement structures; converting the rewritten AST into an SQL (Structured Query Language) query statement after dynamic rewriting; and returning the dynamically rewritten SQL query statement, and rewriting the SQL expression and the SQL statement structure in the AST according to a preset dynamic modification logic. The technical problem that a complex nested structure cannot be processed in a traditional SQL enhancement or modification mode can be effectively solved.

A variable magnification optical system comprising a first lens group, a second lens group, a third lens group, and a rear group in order from object side is configured so that at varying magnification the distances between adjacent lens groups are varied; at a predetermined object distance the variable magnification optical system has focused states with different amounts of aberration; the rear group includes a first focusing lens group and a second focusing lens group disposed closer to an image side than the first focusing lens group, the first and second focusing lens groups moving along different trajectories at focusing; at the object distance the first and second focusing lens groups move at transition from a first focused state to a second focused state; and the following conditional expression is satisfied:−6.80<f1 / f2<−0.05where f1 and f2 are the focal lengths of the first and second lens groups, respectively.

The imaging lens consists of, in order from the object side, a first lens group having a positive refractive power, a stop, a second lens group having a positive refractive power, and a third lens group. The third lens group includes one or more positive lenses and one or more negative lenses. During focusing, an entirety of the first lens group, the stop, and the second lens group, or an entirety of the second lens group integrally moves as a focus group, and the third lens group remains stationary with respect to an image plane. The imaging lens satisfies predetermined conditional expressions.

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 imaging lens system includes 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, sequentially arranged from an object side. The seventh lens has a convex image-side surface, the eighth lens has positive refractive power, and the imaging lens system satisfies the following conditional expression: 1.10<f3 / f<1.40, where f is a focal length of the imaging lens system, and f3 is a focal length of the third 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, wherein, when focusing, the second lens group moves along an optical axis, and the optical system satisfies the conditional expressions 0.100<BFa / f<0.500 and −5.000<(−G1R1) / f<500.000, where BFa is an air equivalent distance on the optical axis between a lens surface on an image side of a lens disposed closest to an image and the image, f is a focal length of the optical system, and G1R1 is a radius of curvature of a lens surface on the object side for a lens component disposed farthest on the object side in the first lens group.

A microscope objective lens (OL) comprises a first lens group (G1) having positive refractive power, a second lens group (G2) having negative refractive power, and a third lens group (G3) having positive refractive power, the first lens group (G1) having a cemented lens (CL11) including a negative lens. The microscope objective lens satisfies the following conditional expressions. 0.625<θgF1N<0.725 22.5<νd1N<30 where νd1N is the Abbe's number of the negative lens in the cemented lens (CL11) of the first lens group (G1), and θgF1N is the partial dispersion ratio of the negative lens in the cemented lens (CL11) of the first lens group (G1).

An optical system includes a compound lens that includes a first lens and a second lens. The first lens is made of a resin, and the second lens is made of glass. In a case where a maximum value of a thickness of the first lens is denoted by A [mm] and a minimum value of the thickness of the first lens is denoted by B [mm], the optical system satisfies Conditional Expressions (1) and (2).A / B ≤10(1)A≤3⁢ mm(2)In a case where an amount of plastic deformation of the resin in a state where an indenter is pressed into the resin at a loading rate of 200 mN / 10 sec at an environmental temperature of 25° C. is denoted by x [μm], the resin satisfies Conditional Expression (3).1. μm≤x≤4. μm(3)

The invention discloses a compact internal focusing wide-angle photographic lens and a photographic device. The lens sequentially comprises a first lens group with positive focal power, an aperture diaphragm, a second lens group with positive focal power and a third lens group with negative focal power from an object side to an image side, in the focusing process, the second lens group moves along the optical axis, and the first lens group and the third lens group remain unchanged relative to the position of the image plane. The first lens group, the second lens group and the third lens group satisfy the following conditional expressions: 1.5 < = F1 / F < = 3.5; 1 < = F2 / F < = 2; -3 < = F3 / F < =-1; wherein F1 represents the composite focal length of the first lens group, F2 represents the composite focal length of the second lens group, F3 represents the composite focal length of the third lens group, and F represents the focal length of the photographic lens. The compact internal focusing type wide-angle photographic lens provided by the technical scheme of the invention is beneficial to optimizing the optical performance of the lens, simplifying the focusing mechanism and simplifying the design and manufacturing.

The invention discloses a large-aperture internal focusing type standard photographic lens and a photographic device. The lens sequentially comprises a first lens group with positive focal power, an aperture diaphragm, a second lens group with positive focal power and a third lens group with negative focal power from an object side to an image side, in the focusing process, the second lens group moves along the optical axis, and the first lens group and the third lens group remain unchanged relative to the position of the image plane. The first lens group, the second lens group and the third lens group satisfy the following conditional expressions: 1 < = F1 / F < = 3; 0.5 < = F2 / F < = 1.5; -5 < = F3 / F < =-3; wherein F1 represents the composite focal length of the first lens group, F2 represents the composite focal length of the second lens group, F3 represents the composite focal length of the third lens group, and F represents the focal length of the photographic lens. The large-aperture internal focusing type standard photographic lens provided by the technical scheme of the invention is beneficial to optimization of optical performance, focusing mechanism, balance of positive and negative focal power and simplification of design and manufacturing of the lens.

The invention provides a variable magnification optical system which is compact and light in weight and maintains good optical performance in the whole variable magnification area, and an imaging device provided with the variable magnification optical system. The variable magnification optical system includes, in order from an object side to an image side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a subsequent group including one or more lens groups. When changing magnification, the first lens group moves, and all intervals between adjacent lens groups change. One of the lens groups included in the subsequent group is a focusing lens group that moves along the optical axis at the time of focusing. The variable magnification optical system satisfies a preset conditional expression.

An optical lens (100), an image module (200), and a terminal device (400) are provided. An optical lens (100) includes: a first lens (L1), a fourth lens (L4) and a sixth lens (L6) each having negative refractive power, and a second lens (L3), a third lens (L4), and a fifth lens (L5), each having positive refractive power. The optical lens (100) satisfies following conditional expressions: 6.5<TTL / IMGH<7.2, and 1.9<TTL / F<2.2, TTL is a distance from the object side surface (S1) of the first lens (L1) to the image plane (IMG) of the optical lens (100) along the optical axis (O), IMGH is half of an image height corresponding to the maximum field of view of the optical lens (100), and F is a focal length of the optical lens (100). The optical lens (100) can realize the miniaturization design and have high imaging quality at the same time.

An imaging lens consists of, in order from an object side, a front group, a stop, and a rear group. The front group includes, in successive order from a side closest to the object side, a first lens that is a negative lens having a concave surface facing an image side and a second lens that is a negative lens having a concave surface facing the image side. Two or less focus lens groups are disposed on the image side with respect to the second lens. During focusing, the two or less focus lens groups move along an optical axis, and lenses other than the two or less focus lens groups are fixed with respect to an image plane. The imaging lens satisfies a predetermined conditional expression.

The invention provides a large-aperture medium-format wide-angle automatic focusing lens and an image pickup device. The lens sequentially comprises a first lens group with positive focal power, a second lens group with negative focal power, a third lens group with negative focal power, an aperture diaphragm, a fourth lens group with positive focal power and a fifth lens group with negative focal power from an object side to an image side, in the focusing process, the second lens group moves from the object side to the image side along the optical axis, and the fourth lens group moves from the image side to the object side along the optical axis. The lens satisfies the following conditional expressions: 0.5 < F1 / F < 2.5; f2 / F is greater than-3.5 and less than-2; 0.5 < F4 / F < 1.5; f / H is greater than 1 and less than 2.5. According to the scheme, better imaging quality can be realized under a larger aperture, so that the medium-format lens can adapt to large-aperture photography and video recording.

An imaging optical system according to the present disclosure includes: an aperture stop; an image-forming optical system that causes an image to be formed toward an imaging plane of an image sensor; and an optical phase modulator that includes a substance having a birefringence index, and gives two pupil functions to the image-forming optical system. The following conditional expressions are satisfied:1≤(2×L×tan(w)+D) / D<1.4  (1)λ / 4*0.75<Re<λ / 4*1.1  (2), whereL: a distance between the aperture stop and the optical phase modulator; D: an aperture diameter (diameter) of the aperture stop; w: a maximum angle of incidence of a principal light ray that enters the aperture stop; λ: a wavelength of light; and Re: phase retardation caused by birefringence of the optical phase modulator.

The invention discloses a visual system, the visual system comprises a lens barrel, and a first lens, a reflective polarization element, a quarter-wave plate, a second lens, a third lens and a partial reflection element which are assembled in the lens barrel, the first lens has positive focal power, and the first side surface is a convex surface; the second lens has focal power, and the first side surface is a plane; the third lens has focal power, and the second side surface is a convex surface; first and second spacing elements are respectively arranged between the first and second lenses and between the second and third lenses; the visual system meets the conditional expression of 9.15 lt; d2s / CT2lt; 12.6, 0.13 < = d1s-d1m / T12 < = 1.96 and 3.3 lt; f / (CP1 + EP12) lt; and 7.9.

An example electronic device is provided, including a housing, a lens cover, and a lens assembly disposed in the housing. The lens assembly includes a plurality of lenses sequentially arranged from an object side to an image side along an optical axis. The lens assembly satisfies a conditional expression: 0.7<IH / (4*F #)<6, where IH is a total image height of the lens assembly, and F # is an F-number of the lens assembly. At least one lens that is in the lens assembly and that is close to the object side is configured to move along the optical axis. An equivalent focal length of the lens assembly is between 18 mm and 30 mm.

The utility model discloses an optical imaging system and a camera module comprising the same. The optical image capturing system includes a lens barrel, and a lens group and a plurality of spacer elements accommodated therein, in which the lens group includes 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 along an optical axis. The plurality of spacer elements includes first, second, third, and fourth spacer elements located on image sides of the first, second, third, and fourth lenses, respectively, and bearing image side portions of the first, second, third, and fourth lenses, respectively. The maximum height L of the lens barrel, the effective focal length f of the optical imaging system, the distance EP23 from the second spacer element to the third spacer element on the optical axis, the maximum thickness CP3 of the third spacer element in the optical axis direction, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy the conditional expression 0.50 lt; l / flt; 0.75, 0.60 lt, 0.75, 0.60 lt; (EP2 < 3 + CP3 >) / CT2lt; 2.50 and 2.00 lt, 2.50 and 2.00 lt; (EP2 < 3 + CP3 >) / CT3lt; and 8.50.

An optical imaging system includes a first lens group including a first lens, a second lens, and a third lens, and a second lens group including a fourth lens, a fifth lens, and a sixth lens and configured to be movable in an optical axis direction, wherein the first lens group and the second lens group are disposed in order from an object side toward an image plane side, and wherein conditional expression 1.50<(v1−v2) / (v3−v2)<2.50 is satisfied, where v1 is an Abbe number of the first lens, v2 is an Abbe number of the second lens, and v3 is an Abbe number of the third lens.

A display device includes a display configured to output a screen image along a first direction, and a lens assembly including at least three lenses arranged sequentially along an optical axis and configured to focus or guide the screen output from the display in a predetermined direction / predetermined position. The lens assembly may be configured to reflect the screen output from the display at least twice between a first lens disposed farthest from the display and an nth lens disposed closest to the display. The display may be disposed to be movable in a direction crossing the first direction or the optical axis. The display device satisfies [Conditional expression 1: 0.02<=MD / DSP<=0.2] regarding the diagonal length DSP of the display and the distance MD from the optical axis to the center of the display which is measured along a direction perpendicular to the optical axis.

The illumination optical system is disposed at a distal end of a light guide of an endoscope. A first surface that is a surface of the illumination optical system closest to a light guide side includes a plurality of ring-shaped groove portions that are arranged in a concentric circular shape about an optical axis of the illumination optical system. The groove portions have an inclined surface that narrows a groove width from the light guide side toward an irradiation target side. In the first surface, all surfaces that are perpendicular to the optical axis and adjacent to the inclined surfaces of the groove portions are light diffusion surfaces. The light diffusion surfaces include first light diffusion surfaces that are present between the groove portions adjacent to each other. The illumination optical system satisfies a predetermined conditional expression.

The invention discloses a condition analysis execution method and device based on dynamic configuration and computer equipment. The method comprises the following steps: acquiring a condition expression and corresponding data; constructing a logic tree structure; traversing condition items; judging whether the condition item is a leaf node or not; if yes, inquiring an operator registration library to determine whether an operator exists or not; if yes, executing an operation method, and performing type self-adaptive processing to obtain a Boolean result; recording Boolean results; judging whether the current condition item is the last condition item or not; if yes, applying root logic to output a result; if not, performing exception handling; and if the condition item is not the leaf node, recursively processing the sub-conditions, aggregating results obtained by processing to obtain a Boolean result, and recording the Boolean result. By implementing the method provided by the invention, flexible and easy-to-maintain condition processing capability can be provided, and the problems of framework rigidity, high maintenance cost, function limitation and the like in the prior art are effectively solved.

An imaging optical system (100) includes, in order from an object side to an image side, a front group (110), an aperture (130), and a rear group (120). The front group (110) is configured from a plurality of lenses including the first lens (10) disposed closest to the object side. The rear group (120) is configured from a plurality of lenses. The first lens (10) has a negative refractive power. When the total length of the entire lens system is d0, the effective radius of the object-side lens surface (11) of the first lens (10) is sd11, and the maximum image height is IH, the following conditional expressions are satisfied: 3.000 < d0 / sd11 < 4.500 (1); and (2) d0 / IH is greater than 2.500 and less than 5.000.

To provide an optical system having an excellent optical characteristic while satisfying the demand for the size reduction and improvement of light quantity efficiency.SOLUTION: An optical system includes, in the order from a pupil surface EP side to a display surface IMG side, a first lens L1 having a positive refractive power, a second lens L2 having a positive refractive power, and a third lens L3. The optical system includes a half mirror HM, a first reflection polarization plate 11 disposed between the pupil surface EP and the half mirror HM, a first quater wave retardation plate 21 disposed between the pupil surface EP and the half mirror HM, a second quater wave retardation plate 22 disposed between the half mirror HM and the display surface IMG, and a second reflection polarization plate 12 disposed between the half mirror HM and the display surface IMG, and a predetermined conditional expression is satisfied.SELECTED DRAWING: Figure 1

An imaging lens system includes, sequentially from an object side: a first lens having positive power with an object-side surface whose convex surface faces the object side; a second lens having negative power with an object-side surface whose convex surface faces the object side; a third lens, the third lens being a meniscus lens having positive power with an image-side surface whose convex surface faces an image side; a fourth lens having negative power with an image-side surface whose concave surface faces the image side; a fifth lens which is a biconvex lens having positive power; and a sixth lens with an object-side surface whose convex surface faces the object side, in which the imaging lens system satisfies the following Conditional Expressions (1) to (3): nd1>1.77 . . . (1), nd2>1.77 . . . (2), and 0.8<f3 / f<12.0 . . . (3).

The invention relates to the field of optics, in particular to a zoom lens and an imaging device. The zoom lens is sequentially composed of a first fixed lens group with positive focal power, a first zoom lens group with negative focal power, a second zoom lens group with positive focal power, a diaphragm, a focusing lens group, a compensation lens group with negative focal power and an auxiliary zoom group with positive focal power from the object plane side to the image plane side. The focusing lens group is formed by one lens; the zoom lens satisfies the following conditional expressions: ft / fw > = 60; fnow is less than 3.2; wherein fw is the focal length of the zoom lens in the wide-angle state, ft is the focal length of the zoom lens in the telescopic state, and fnow is the number of apertures of the zoom lens in the wide-angle state. According to the zoom lens, the plurality of mobile groups are arranged, so that a small number of apertures can be realized under the condition that the zoom lens with a large focal length can realize a large magnification, and the brightness of the zoom lens is increased.