62 results about "Conditional expression" patented technology

An observation optical system includes a display element and an eyepiece lens disposed on an eyepoint side of the display element. The eyepiece lens includes a first lens having positive optical power, a second lens having negative optical power, and a third lens consecutively in order from closest to a display element side to the eyepoint side. In a case where a half value of a longest diameter of a display region in the display element is denoted by H, and a focal length of the eyepiece lens in a state where diopter is −1 diopter is denoted by f, the observation optical system satisfies a conditional expression represented by 0.35<H / f<0.6.

The application realizes a kind of conditional expression related source code defect intelligent detection method.The overall process includes preprocessing, node embedding, control flow coding and API usage attention mechanism;Given a Java method and the conditional expression to be checked, the preprocessing first parses it into CFG form;The node embedding uses bidirectional long short-term memory network to encode the statement into node vector;The control flow coding is on the node vector, and uses the LSTM unit of single graph structure to encode each node encountered along the control flow path of CFG;The API usage attention mechanism combines the attention module with the API label of the statement;After the attention mechanism, multiple node vectors are converted into a single vector, and the semantics of the conditional defect is learned and identified in an end-to-end manner.The problem that important control flow information of source code may be missed in the source code conditional defect detection problem is solved.

The present application relates to an optical imaging lens (30), a camera module (20), and an electronic device (10). The optical imaging lens (30) comprises a first lens (31) having a positive optical power, a second lens (32) having a positive optical power, a third lens (33) having a negative optical power, and a fourth lens (34) having a negative optical power. An object-side surface of the first lens (31) is a convex surface near an optical axis; the fourth lens (34) is configured to be movable along the optical axis between the third lens (33) and an imaging plane (35) of the optical imaging lens (30), and the optical imaging lens (30) satisfies the following conditional expression: 0.6≤|EFL1 / EFL2|≤1.

This invention provides a zoom lens with anti-vibration properties, which facilitates miniaturization and weight reduction while maintaining good optical performance, and a camera device equipped with the zoom lens. The zoom lens, from the object side towards the image side, sequentially comprises a first lens group with positive refractive power, a second lens group with negative refractive power, an intermediate group with positive refractive power, and a subsequent group with negative refractive power. The first lens group moves during zooming. The second lens group, from the object side towards the image side, sequentially includes a front group of the second lens group that remains stationary during image shake correction and an anti-vibration group with negative refractive power that moves during image shake correction. The zoom lens satisfies a predetermined conditional expression.

An optical imaging system and a portable electronic device are disclosed. The optical imaging system includes, arranged in order from an object side toward an image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, wherein the first lens has a positive refractive power, and in two axes of the first lens that intersect an optical axis and are perpendicular to each other, a length of one axis is greater than a length of the other axis, wherein the following conditional expressions are satisfied: 4.5 < TTL / IMG HT < 6.5; 0.87 < TTL / f < 1.31; and 0.65 < L1S1es / L1S1el < 0.9, where TTL is a distance on the optical axis from an object side surface of the first lens to an imaging surface, IMG HT is half of a diagonal length of the imaging surface, f is a total focal length of the optical imaging system, L1S1el is a maximum effective radius of the object side surface of the first lens, and L1S1es is a minimum effective radius of the object side surface of the first lens.

An optical imaging system includes a plurality of lenses sequentially disposed along an optical axis of the optical imaging system from an object side of the plurality of lenses toward an imaging plane of the optical imaging system; and a reflective member disposed in front of the plurality of lenses and including a reflective surface, wherein the plurality of lenses includes a first lens disposed closest to the reflective member and having a positive refractive power, and a second lens disposed adjacent to the first lens on an image side of the first lens and having a negative refractive power, and conditional expressions 60°<FOV<90° and 1.3<Fno<1.7 are satisfied, where FOV is a field of view of the optical imaging system, and Fno is an F-number of the optical imaging system.

The application relates to the field of optics, in particular to a zoom lens and an imaging device. The zoom lens is composed of a first lens group with negative focal length, an aperture, a second lens group with positive focal length and a third lens group with negative focal length from the object plane side to the image plane side; the second lens group moves along the direction of the main optical axis; the third lens group is an eighth lens with negative focal length; the two side curved surfaces of the eighth lens are curved towards the object plane side; the eighth lens satisfies the following conditional expressions: D8 / fw>1; 1.8<ft / fw<2.2; wherein D8 is the thickness of the eighth lens on the main optical axis, fw is the focal length of the zoom lens in the wide-angle state, and ft is the focal length of the zoom lens in the telephoto state. The small-ratio zoom lens is realized, the thickness of the rear group is increased through the limitation of the thickness of the eighth lens on the main optical axis, the volume of the rear group is reduced, and the miniaturization of the zoom lens is realized.

An imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in ascending numerical order along an optical axis of the imaging system from an object side of the imaging lens system toward an imaging plane of the imaging lens system, wherein the imaging lens system satisfies the conditional expressions 0.13<ImgH / TTL<0.16 and 5.3<TTL / f<5.5, where ImgH is a maximum effective image height on the imaging plane, TTL is a distance along the optical axis from an object side of the first lens to the imaging plane, and f is a focal length of the imaging lens system.

An optical system (OL) has a first lens group (G1), a first focusing lens group (GF1) having a negative refractive power, and a second focusing lens group (GF2) having a positive refractive power, arranged in the stated order from the object side along the optical axis, the first focusing lens group (GF1) and the second focusing lens group (GF2) moving along the optical axis in mutually different trajectories during focusing, and the optical system (OL) furthermore having an aperture diaphragm (S) disposed further toward the object side than the first focusing lens group (GF1), and satisfying the following conditional expression: 0.68<(−fF1) / fF2<3.60, where fF1 is the focal length of the first focusing lens group (GF1), and fF2 is the focal length of the second focusing lens group (GF2).

An immersion objective, an optical system and a detection method. The immersion objective sequentially comprises, in the direction from an object side (S) to an image side, a first lens group (G1) having a positive focal power, at least one group of lens groups (G5, G6) having a negative focal power, and an immersion medium (m) which is located on the object side (S) of the first lens group (G1) and immerses at least part of the first lens group (G1), wherein the working distance S0 of the immersion medium (m) between the first lens group (G1) and the object side (S) and the focal length Fobj of the immersion objective satisfy the conditional expression 0≤S0 / Fobj≤0.16. By means of the cooperation of a plurality of groups of lenses, an immersion objective has a relatively small size and a relatively low mass within a relatively compact size range, and a large field of view, a high resolution and a low distortion are achieved, thereby improving the optical performance of the immersion objective.

An objective optical system for an endoscope comprising, in order from the object side, a first lens unit G1 having a negative refractive power, a second lens unit G2 having a positive refractive power, and a third lens unit G3 having a positive refractive power. The first lens unit G1 includes a negative lens L1. The second lens unit G2 includes a positive meniscus lens L2 having a convex surface facing the image side. The third lens unit G3 includes, in order from the object side, an object side positive lens L3 and a cemented lens CL made up of a positive lens L4 and a negative lens L5. The second lens unit G2 is moved for focusing. The objective optical system satisfies the following conditional expressions (1) and (2):-0.0⁢7<f⁢1 / f⁢2<-0.015(1)-0.4<f⁢1 / f⁢3<-0.1⁢5(2)where f1 is the focal length of the first lens unit, f2 is the focal length of the second lens unit, and f3 is the focal length of the third lens unit.

The application provides an augmented reality optical system and device, the augmented reality optical system comprising a receiver, a lens group and an image display, the lens group comprising a first lens, a second lens and a third lens; wherein a composite film is arranged on the third optical side, the composite film comprising a first polarizing film and a polarization reflection film; a quarter-wave plate is arranged on the sixth optical side; a semi-transparent semi-reflective film is arranged on the seventh optical side; the augmented reality optical system satisfies the following conditional expression: 0.20 <= TD / TTL <= 0.26. By designing the first lens, the second lens and the third lens to cooperate to form a three-piece optical path folding structure, and arranging the first polarizing film, the polarization reflection film, the quarter-wave plate and the semi-transparent semi-reflective film, higher optical performance can be obtained, and the imaging quality of the augmented reality optical system is improved. Moreover, the augmented reality optical system can have a smaller size under the condition of satisfying the above conditional expression, so that miniaturization is realized.

Provided is an objective optical system, an imaging device, and an endoscope that can ensure the stroke of lens movement at the time of focus adjustment, suppress the effects of center shift and degradation of optical performance caused by manufacturing errors, and set the base length of a left-eye objective optical system and a right-eye objective optical system shorter at the time of 3D observation. The objective optical system includes, in order from the object side, a front group FG, an aperture stop S, and a rear group RG, the front group FG includes a first lens L1 having a negative refractive power with a concave surface facing the image side, a second lens L2 having a negative refractive power, and a third lens L3 having a positive refractive power, the rear group RG includes a fourth lens L4 having a positive refractive power and a fifth lens L5 having a positive refractive power, the fifth lens L5 is a cemented lens, and the objective optical system satisfies the following conditional expression (1): 2.3 < f3 / f5 < 20 (1), where f3 is the focal length of the third lens L3 and f5 is the focal length of the fifth lens L5.

A zoom optical system (ZL) comprises: a first lens group (G1) disposed closest to an object and having a positive refractive power; an aperture stop (S) disposed closer to an image than the first lens group (G1); a positive lens component disposed so as to oppose the image side of the aperture stop (S); and a lens group (G3) having the positive lens component, wherein a distance between the first lens group (G1) and the lens group (G3) having the positive lens component changes during zooming, at least one lens surface of the positive lens component has an aspherical surface, and the following conditional expression,0.40<fp / fGp<3.60is satisfied,wherefp: a focal length of the positive lens component, andfGp: a focal length of the lens group (G3) having the positive lens component.

To provide an imaging optical system capable of effectively correcting chromatic aberration, and an imaging apparatus equipped with such an imaging optical system. [Solution] The imaging optical system 100 comprises, in order from the object side to the image side, a front group 110, an aperture 130, and a rear group 120. The front group 110 comprises, in order from the object side to the image side, a first group 111 having negative power and a second group 112 having positive power. The second group 112 comprises a third lens 30 and a fourth lens 40 adjacent to the third lens 30 on the image side and positioned closest to the image. If the Abbe number of the third lens 30 is ν21, the Abbe number of the fourth lens 40 is ν22, the focal length of the third lens 30 is f3, and the focal length of the fourth lens 40 is f4, then the following conditional expression ν21<30.000 44.000<ν22 0.000 < |f3 / f4| < 0.500 It satisfies the condition.

An optical imaging system includes a first lens group including a first lens and a second lens disposed in order along a first optical axis, a second lens group including a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens disposed in order along a second optical axis perpendicular to the first optical axis, and a light path conversion member disposed between the first lens group and the second lens group, the light path conversion member being configured to change a traveling direction of light from a direction of the first optical axis to a direction of the second optical axis, wherein a conditional expression 0.5 ≤ |f / f1| + |f / f2| ≤ 1.5 is satisfied, where f is a focal length of the optical imaging system, f1 is a focal length of the first lens, and f2 is a focal length of the second lens.

An optical imaging system includes a first lens having positive refractive power, a second lens having refractive power, a third lens having positive refractive power, a fourth lens having negative refractive power, a fifth lens having refractive power, a sixth lens having a convex object side, and a seventh lens having negative refractive power, wherein the first lens through the seventh lens are arranged in order from the object side, and wherein the following conditional expression is satisfied: 2.7 < SD1 / SD5 < 3.3, where SD1 is an effective radius of an object side surface of the first lens, and SD5 is an effective radius of an object side surface of the third lens.

A document review system that displays a workflow builder interface comprising a block library and a workflow canvas. The system receives user selection of workflow blocks including rule execution blocks, conditional logic blocks, and output blocks, enables positioning of the blocks on the canvas, and receives user-defined connections between blocks. The system receives natural language rule definitions through prompt fields and document selections through context selectors, processes the rule definitions using an artificial intelligence engine to generate executable operations, receives conditional expressions for workflow branching logic, configures output parameters, and executes workflows defined by the positioned blocks and connections.

An optical imaging system includes: a first lens group including a first lens and a second lens disposed in order from an object side in a first optical axis direction; a second lens group including a third lens, a fourth lens, a fifth lens, and a sixth lens disposed in order in a second optical axis direction perpendicular to the first optical axis direction; and a light path changing member disposed between the first lens group and the second lens group and configured to change a propagation direction of light from the first optical axis direction to the second optical axis direction, wherein the optical imaging system satisfies a conditional expression 0.5 ≤ |f / f1|+|f / f2| ≤ 2.0, where f is a focal length of the optical imaging system, f1 is a focal length of the first lens, and f2 is a focal length of the second lens.

The present application relates to the field of optics, specifically to a glass-plastic hybrid zoom lens and an imaging device. The glass-plastic hybrid zoom lens sequentially comprises, from an object side to an image side, a first fixed lens group with positive focal power, a variable zoom lens group with negative focal power, a second fixed lens group with positive focal power, a focusing lens group with positive focal power, and a third fixed lens group with positive focal power. The glass-plastic hybrid zoom lens satisfies the following conditional expressions: 9 < ft / fw < 11; -3 < fG2 / fw < -2; wherein ft is the focal length of the glass-plastic hybrid zoom lens in a telephoto state, fw is the focal length of the glass-plastic hybrid zoom lens in a wide-angle state, and fG2 is the focal length of the variable zoom lens group. Through the above structure and parameter limitation, the volume of the glass-plastic hybrid zoom lens is greatly reduced, and the magnification of the glass-plastic hybrid zoom lens is also increased to some extent, thereby increasing the resolving power of the glass-plastic hybrid zoom lens.

This invention discloses an optical imaging lens, which sequentially includes a first, second, third, and fourth lens from the object side to the image side. The invention provides an optical imaging lens with a small overall volume, excellent optical quality, and good impact resistance by having a concave circumferential region on the image side of the second lens, a concave circumferential region on the object side of the fourth lens, and a convex optical axis region on the image side of the fourth lens, satisfying at least one conditional expression.

The application relates to the field of optics, in particular to a zoom lens and an imaging device. The zoom lens is sequentially composed of a fixed lens group with positive focal length, a first variable magnification lens group with negative focal length, a diaphragm, a second variable magnification lens group with positive focal length, a focusing lens group with negative focal length and a third variable magnification lens group with positive focal length from the object plane side to the image plane side; the zoom lens satisfies the following conditional expressions: TTL < 95 mm; ft / fw > 25; wherein TTL is the total optical length of the zoom lens, ft is the focal length of the zoom lens in a telephoto state, and fw is the focal length of the zoom lens in a wide-angle state. The zoom lens can realize a large zooming range under a small volume, and the coma of the zoom lens is reduced and the imaging quality of the zoom lens is increased through the arrangement of multiple variable magnification lens groups.

This zoom lens comprises a plurality of lens groups disposed in order from the object side to the image side, and the distances between adjacent lens groups change during zooming. A first lens group disposed closest to the object side among the plurality of lens groups is immobile with respect to an image surface during zooming. The plurality of lens groups each have one or more aspheric lenses comprising a resin material. The first lens group disposed closest to the object side among the plurality of lens groups has a positive lens Gp, and satisfies a predetermined conditional expression where υdp, θgFp, and ∆θgFp are the Abbe number, partial dispersion ratio, and anomalous partial dispersion of the material of the positive lens Gp, respectively.

An optical imaging system includes a first lens having positive refractive power, a second lens having refractive power, a third lens having positive refractive power, a fourth lens having negative refractive power, a fifth lens having refractive power, a sixth lens having a convex object-side surface, and a seventh lens having negative refractive power, wherein the first to seventh lenses are disposed in order from an object side, and wherein the following conditional expression is satisfied: 2.7<SD1 / SD5<3.3, where SD1 is an effective radius of an object-side surface of the first lens, and SD5 is an effective radius of an object-side surface of the third lens.

The application discloses an optical lens and an optical lens module with a small head wide angle, and belongs to the technical field of optical imaging. The optical lens comprises, in sequence from the object side to the image side along the optical axis, a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power. The optical lens satisfies the following conditional expressions: 3.430 <= Tan(Semi-Fov) / CT1 <= 5.136; 7.657 <= (ET3+ET4) / T34 <= 30.002. The first lens, the second lens, the third lens, the fourth lens and the fifth lens are combined and arranged as described above, which is favorable for reducing stray light generated in the first lens and improving the imaging quality of the optical lens. Meanwhile, the optical lens is favorable for meeting the characteristic of a small view depth and has a wide-angle characteristic, and the optical lens is convenient for miniaturization.

A variable magnification optical system comprising, in order from an object side, a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group and a fourth lens group; upon varying a magnification, respective distances between neighboring lens groups being varied; the first lens group comprising a negative lens at a most object side and a positive lens at a most image side, the negative lens being a negative meniscus lens having a convex surface facing the object side; and the second lens group comprising, in order from the object side, a 2a lens group having positive refractive power, a 2b lens group having positive refractive power, and a 2c lens group. The optical system satisfies specified conditional expressions.

An ultra-wide-angle capsule endoscope lens is characterized in that, from an object plane to an image plane, a transparent cover (TC), a first lens (L1), a second lens (L2), a third lens (L3), a diaphragm (STO), a fourth lens (L4), a fifth lens (L5), a sixth lens (L6), and an infrared filter (IR) are sequentially arranged, the first lens (L1), the second lens (L2), and the third lens (L3) constitute a first lens group (E1), the fourth lens (L4), the fifth lens (L5), and the sixth lens (L6) constitute a second lens group (E2), and the lens satisfies the following conditional expressions: -4mm < f1-3 / f < -3mm; -0.8mm < f4-6 / f < -0.7mm; and 17mm <= TTL / f <= 18mm. The ultra-wide-angle capsule endoscope lens has the characteristics of a short TTL, a large aperture, high resolution, good depth of field, and a large field of view.