CN220773324U - Compact type zoom adjustable lens - Google Patents

Abstract

The utility model relates to a compact zoom adjustable lens which comprises a connecting base, and a focusing assembly, a continuous zoom assembly, a dimming assembly, a rear fixing assembly and a detector assembly which are positioned on the connecting base and are sequentially arranged from left to right. The utility model has simple structure and reasonable design, reduces the whole volume, lightens the weight of the whole structure, achieves the achievement of compact structure and the total length of the system while meeting the requirement of zooming of a long focal length, and meets the use requirement.

Description

Compact type zoom adjustable lens

Technical Field

The utility model relates to a compact type zoom adjustable lens.

Background

For a long-focus zoom lens, due to the fact that the focal length is too long and the focusing range is large, the light incident caliber of the lens is enlarged, the caliber size of the lens is too large, the whole structure is increased in size, meanwhile, the whole weight is driven to be increased, the carrying capacity is too large, and the use requirements of some specific environments cannot be met.

Disclosure of Invention

In order to solve the above problems, the present utility model provides a compact zoom adjustable lens, which reduces the overall volume, reduces the weight of the overall structure, and has a compact structure while requiring a long focal length zoom switch.

The utility model is composed of a connecting base, and a focusing assembly, a continuous zooming assembly, a dimming assembly, a rear fixing assembly and a detector assembly which are positioned on the connecting base and are sequentially arranged from left to right.

Further, the focusing assembly comprises a focusing main lens barrel, a focusing lens group and a focusing guide pin assembly, wherein the focusing lens group and the focusing guide pin assembly are installed in the focusing main lens barrel, a focusing cam is sleeved outside the focusing main lens barrel, a linear chute is arranged on the focusing cam, a milling straight groove is arranged on the focusing main lens barrel, the focusing guide pin assembly penetrates through the linear chute and the milling straight groove to be connected with the focusing lens group, a focusing motor gear and a focusing potentiometer gear are respectively arranged on the outer side of the focusing cam, the focusing motor gear and the focusing potentiometer gear are respectively meshed with a focusing gear ring arranged on the focusing cam, the focusing motor gear is driven to rotate by a focusing motor, and a focusing potentiometer is connected to the middle part of the focusing potentiometer gear; two focusing micro switches are arranged along the rotation direction of the focusing cam, and focusing limiting nails positioned between the two focusing micro switches are arranged outside the focusing cam; the focusing guide pin assembly comprises a guide pin and two rollers arranged on the upper part of the guide pin, and a transition ring is arranged between the two rollers.

Further, the continuous zooming assembly comprises a zooming main lens barrel and a zooming cam sleeved on the outer side of the zooming main lens barrel, a front row of steel balls and a rear row of steel balls are arranged between the zooming cam and the zooming main lens barrel, and the zooming cam is limited on the zooming main lens barrel by adopting a zooming cam pressing ring; a zoom component and a compensation component are respectively arranged in the zoom main lens barrel; the variable-magnification assembly comprises a variable-magnification guide pin assembly, a variable-magnification carriage and a variable-magnification lens group arranged on the variable-magnification carriage, and the compensation assembly comprises a compensation guide pin assembly, a compensation carriage and a compensation lens group arranged on the compensation carriage; the zoom cam is provided with a zoom curve groove and a compensation curve groove, zoom main lens barrel is provided with a zoom straight groove and a compensation straight groove at the positions of the zoom curve groove and the compensation curve groove, a zoom guide pin component passes through the zoom curve groove and the zoom straight groove and is connected with a zoom carriage, the compensation guide pin component passes through the compensation curve groove and the compensation straight groove and is connected with the compensation carriage, a zoom motor gear and a zoom potentiometer gear are arranged outside the zoom main lens barrel, the zoom motor gear and the zoom potentiometer gear are respectively meshed with a zoom gear ring arranged on the zoom cam, the zoom motor gear is driven to rotate by a zoom motor, and the zoom potentiometer gear is connected with a zoom potentiometer; two zooming micro switches are arranged along the circumference of the variable Jiao Tulun, and a zooming limiting nail arranged on the outer side of the zooming cam is arranged between the two zooming micro switches.

Further, the light adjusting component comprises a diaphragm sheet component, a diaphragm seat, a diaphragm moving ring and a diaphragm adjusting ring, wherein the diaphragm moving ring and the diaphragm adjusting ring are arranged on the diaphragm seat, the diaphragm moving ring is limited on the diaphragm seat by a diaphragm moving ring pressing ring, the diaphragm sheet component comprises a diaphragm sheet, a diaphragm moving pin and a diaphragm sheet fixing pin, the diaphragm moving pin and the diaphragm sheet fixing pin are respectively arranged at two ends of the diaphragm sheet, the diaphragm moving pin is arranged in a moving slot hole arranged on the diaphragm seat, the diaphragm sheet fixing pin is arranged in a straight slot arranged on the diaphragm moving ring, the diaphragm seat is provided with a moving corner milling slot for the movement of the diaphragm sheet, the diaphragm moving ring is connected with the diaphragm adjusting ring in a matched manner by a diaphragm pulling pin, the diaphragm adjusting ring is limited by a diaphragm adjusting ring pressing ring, a diaphragm motor gear is arranged outside the diaphragm adjusting ring, and is meshed with the diaphragm adjusting ring gear arranged on the diaphragm adjusting ring, and the diaphragm motor gear is driven to rotate by a diaphragm motor; two diaphragm micro switches are arranged along the rotation direction of the diaphragm adjusting ring, and diaphragm blocking nails arranged on the outer side of the diaphragm adjusting ring are arranged between the two diaphragm micro switches.

Further, the device also comprises a focusing lens group, a zoom lens group, a compensation lens group and a rear fixed lens group which are sequentially arranged from left to right; the focusing lens group comprises a biconvex lens A, an orthodontics lens B, an orthodontics lens C and an orthodontics lens D, wherein the orthodontics lens B and the orthodontics lens C form a first gluing group; the zoom lens group comprises a positive crescent lens E, a biconvex lens F, a biconcave lens G and a negative crescent lens H, wherein the positive crescent lens E, the biconvex lens F and the biconcave lens G form a second gluing group; the compensating lens group comprises a negative crescent lens I, a positive crescent lens J, a positive crescent lens K and a biconvex lens L, wherein the positive crescent lens K and the biconvex lens L form a third gluing group; the rear fixed lens group comprises a plano-convex lens M, a biconcave lens N, a positive crescent lens O, a biconvex lens P, a biconcave lens Q, a negative crescent lens R, a biconvex lens S and a negative crescent lens T, wherein the plano-convex lens M and the biconcave lens N form a fourth bonding group, the biconvex lens P and the biconcave lens Q form a fifth bonding group, and the biconvex lens S and the negative crescent lens T form a sixth bonding group.

Further, the air gap between the biconvex lens A and the first bonding group is 0.2mm, and the air gap between the first bonding group and the positive crescent lens D is 0.19mm; the air interval between the negative crescent lens H and the second bonding group is 50.42mm, and the air interval between the second bonding group and the negative crescent lens H is 1.95mm; the air interval between the negative crescent lens H and the negative crescent lens I is 83.28mm, and the air interval between the negative crescent lens I and the positive crescent lens J is 0.15mm; the air interval between the positive crescent lens J and the third gluing group is 0.15mm; the air interval between the third bonding group and the fourth bonding group is 8.31mm, and the air interval between the fourth bonding group and the positive crescent lens O is 0.67mm; the air interval between the positive crescent lens O and the fifth bonding group is 37.51mm, the air interval between the fifth bonding group and the negative crescent lens R is 13.45mm, and the air interval between the negative crescent lens R and the sixth bonding group is 11.73mm.

Further, the rear fixing component and the detector component are connected through a flange, and the rear fixing component comprises a rear fixing lens barrel and a rear fixing lens group arranged in the rear fixing lens barrel.

Compared with the prior art, the utility model has the following beneficial effects: the device simple structure, reasonable in design, convenient to use under the use premise of satisfying long focus, big focusing scope, has compressed overall structure size, has shortened whole width, and the quality is light, satisfies the operation requirement of some specific environment, and this camera lens structure is easy to assemble more simultaneously, and application range is more extensive, and imaging effect is better.

Drawings

FIG. 1 is a schematic view of a lens structure according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a lens optic according to an embodiment of the present utility model;

FIG. 3 is an overall cross-sectional view of a lens barrel according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a focus assembly according to an embodiment of the present utility model;

FIG. 5 is a side view of a focus assembly according to an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of a continuous variable focus assembly in accordance with an embodiment of the present utility model;

FIG. 7 is a side view of a continuous variable focus assembly according to an embodiment of the present utility model;

fig. 8 is a side view of a dimming component of an embodiment of the present utility model;

fig. 9 is a cross-sectional view of a dimmer pack according to an embodiment of the present utility model;

FIG. 10 is a schematic view of a diaphragm assembly according to an embodiment of the present utility model;

FIG. 11 is a schematic view of a focus guide assembly according to an embodiment of the present utility model;

FIG. 12 is a schematic diagram of the structure of a card slot according to an embodiment of the utility model.

In the figure: 10-focusing components, 11-focusing cam pressing rings, 12-focusing main lens barrels, 13-focusing lens groups, 14-focusing guide pin components, 15-focusing cams, 16-focusing limit pins, 17-focusing micro switches, 18-focusing motor gears, 19-focusing potentiometer gears, 110-focusing motors, 111-focusing potentiometers, 112-guide pins, 113-rollers and 114-transition rings; 20-continuous zooming components, 21-zooming lens groups, 22-zooming carriages, 23-front row steel balls, 24-zooming guide pin components, 25-zooming cams, 26-zooming main lens barrels, 27-rear row steel balls, 28-zooming cam pressing rings, 29-compensating lens groups, 210-compensating carriages, 211-compensating guide pin components, 212-zooming micro-switches, 213-zooming limit nails, 214-zooming potentiometers, 215-zooming motors, 216-zooming potentiometer gears and 217-zooming motor gears; 30-dimming components, 31-diaphragm seats, 32-diaphragm movable ring pressing rings, 33-diaphragm movable rings, 34-diaphragm motor gears, 35-diaphragm toggle pins, 36-diaphragm adjusting ring pressing rings, 37-diaphragm adjusting rings, 38-diaphragm sheet components, 381-diaphragm sheets, 382-diaphragm movable pins, 383-diaphragm sheet fixing pins, 39-diaphragm micro switches, 310-diaphragm blocking pins and 311-diaphragm motors; 40-rear fixing component, 401-rear fixing lens barrel, 402-rear fixing lens group; a 50-detector assembly; 501-a clamping groove structure; 60-connecting the base.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the detailed description.

Examples: referring to fig. 1-12, in this embodiment, a compact zoom adjustable lens is provided, which includes a connection base 60, and a focusing assembly 10, a continuous zoom assembly 20, a dimming assembly 30, a rear fixing assembly 40, and a detector assembly 50, which are disposed on the connection base and sequentially from left to right.

In the embodiment of the utility model, the focusing assembly 10 comprises a focusing main lens barrel 12, a focusing lens group 13 and a focusing guide pin assembly 14, wherein the focusing lens group 13 and the focusing guide pin assembly 14 are installed in the focusing main lens barrel, a focusing cam 15 is sleeved outside the focusing main lens barrel, a linear chute is arranged on the focusing cam, a straight milling groove is arranged on the focusing main lens barrel, the focusing guide pin assembly passes through the linear chute and the straight milling groove and is connected with the focusing lens group, a focusing motor gear and a focusing potentiometer gear are respectively arranged on the outer side of the focusing cam, the focusing motor gear 18 and the focusing potentiometer gear 19 are respectively meshed with a focusing gear ring arranged on the focusing cam, the focusing motor gear is driven to rotate by a focusing motor 110, and the middle part of the focusing potentiometer gear is connected with a focusing potentiometer 111.

The focusing cam and the adjusting lens group are matched through grinding and then are arranged in the focusing main lens barrel so as to achieve the assembly precision among parts; the focusing cam is connected with the focusing main lens barrel through three focusing guide nails which are uniformly distributed. And the focusing is provided with a linear chute according to the requirement of the optical system on the focusing quantity, a straight chute is milled on the focusing main lens barrel, and the focusing cam and the focusing main lens barrel are connected together by a focusing guide pin assembly.

Two focusing micro switches 17 are arranged along the rotation direction of the focusing cam, and focusing limiting nails 16 positioned between the two focusing micro switches are arranged outside the focusing cam.

The focusing cam is limited by adopting a focusing cam pressing ring 11.

The focusing guide pin assembly comprises a guide pin 112 and two rollers 113 arranged at the upper part of the guide pin, and a transition ring 114 is arranged between the two rollers. The two rollers are respectively in clearance fit with the adjusting cam and the focusing main lens barrel, and the clearance is as small as possible so as to be beneficial to smoother overall operation.

The focusing assembly works: when the focusing motor is powered on to rotate and drives the focusing cam to rotate, the rotary motion of the focusing lens group is converted into linear motion through the limitation of the milling straight groove on the focusing main lens barrel, so that focusing on a far target and a near target is realized, and the focusing process is completed. When focusing is carried out on a far target and a near target, the focusing potentiometer gear is meshed with the focusing motor gear to drive the shaft of the focusing potentiometer to rotate, so that the resistance value of the focusing potentiometer is changed, the change value of the focusing potentiometer can be read out through a proper sampling circuit and is transmitted to the control center, and therefore the display of the focusing distance value is realized; on the contrary, the control center gives out a command, so that the real-time control of the focusing distance value can be realized.

In the embodiment of the present utility model, the continuous zoom assembly 20 includes a zoom main barrel 26 and a zoom cam sleeved on the outer side of the zoom main barrel, a front row of steel balls 23 and a rear row of steel balls 27 are arranged between the zoom cam and the zoom main barrel, and the zoom cam is limited on the zoom main barrel by a zoom cam pressing ring 28 to form a rolling bearing structure, so that sliding friction when the zoom cam 25 rotates is converted into rolling friction, and friction force when the zoom cam moves is reduced.

A zoom component and a compensation component are respectively arranged in the zoom main lens barrel; the zoom assembly comprises a zoom guide pin assembly 24, a zoom carriage 22 and a zoom lens group 21 arranged on the zoom carriage, and the compensation assembly comprises a compensation guide pin assembly 211, a compensation carriage 210 and a compensation lens group 29 arranged on the compensation carriage;

the zoom guide pin assembly, the compensation guide pin assembly and the focusing guide pin assembly have the same structure.

The zoom cam is provided with a zoom curve groove and a compensation curve groove according to the requirement of an optical zoom motion equation, the zoom main lens barrel is provided with a zoom straight groove and a compensation straight groove at the positions of the zoom curve groove and the compensation curve groove, a zoom guide pin component passes through the zoom curve groove and the zoom straight groove to be connected with a zoom carriage, the compensation guide pin component passes through the compensation curve groove and the compensation straight groove to be connected with the compensation carriage, a zoom motor gear 217 and a zoom potentiometer gear 216 are arranged outside the zoom main lens barrel, the zoom motor gear and the zoom potentiometer gear are respectively meshed with a zoom gear ring arranged on the zoom cam, the zoom motor gear is driven to rotate by a zoom motor, and the zoom potentiometer gear is connected with a zoom potentiometer 214; two zooming micro switches 212 are arranged along the circumference of the variable Jiao Tulun, and a zooming limiting nail 213 arranged on the outer side of the zooming cam is arranged between the two zooming micro switches.

The continuous zooming assembly works: the zoom motor is started to drive the zoom potentiometer and the zoom cam to synchronously rotate, and the zoom sliding frame and the compensation sliding frame are driven to move according to the zoom and compensation curve grooves respectively through the zoom and compensation curve grooves and the zoom guide pin assembly and the compensation guide pin assembly. The zoom straight groove and the compensation straight groove on the zoom main lens barrel play a role in supporting the zoom guide pin assembly and the compensation guide pin assembly, and the rotary motion of the zoom sliding frame and the compensation sliding frame is changed into linear motion.

The zoom guide pin assembly, the compensation guide pin assembly, the zoom cam, the compensation curve groove and the fit clearance between the linear groove of the zoom main lens barrel are controlled, so that the zoom and compensation assembly can slide stably and comfortably without clamping stagnation. Therefore, the zoom motor rotates to realize the front-back linear motion of the zoom component and the compensation component according to the zoom motion equation, so that the continuous variable function of the system focal length is realized.

When the focal length of the system changes, the zoom potentiometer gear is meshed with the zoom cam gear to enable the zoom potentiometer to rotate, the resistance value of the zoom potentiometer changes, and the change value of the zoom potentiometer can be taken out through a proper sampling circuit and transmitted to the control center, so that the display of the focal length value is realized; on the contrary, the control center gives out a command, so that the real-time control of the focal length can be realized.

In this embodiment, the light adjusting assembly 30 includes a diaphragm sheet assembly 38, a diaphragm seat 31, a diaphragm moving ring and a diaphragm adjusting ring 37, wherein the diaphragm moving ring is disposed on the diaphragm seat, the diaphragm moving ring 33 is limited on the diaphragm seat by a diaphragm moving ring pressing ring 32, the diaphragm sheet assembly includes a diaphragm sheet 381, a diaphragm moving pin 382 and a diaphragm sheet fixing pin 383, the diaphragm moving pin is mounted in a moving slot hole disposed on the diaphragm seat, the diaphragm sheet fixing pin is mounted in a straight slot disposed on the diaphragm moving ring, the diaphragm seat is provided with a moving corner milling slot for moving the diaphragm sheet, the diaphragm moving ring is connected with the diaphragm adjusting ring in a matched manner by a diaphragm pulling pin 35, the diaphragm adjusting ring is limited by a diaphragm adjusting ring pressing ring 36, a diaphragm motor gear is disposed outside the diaphragm adjusting ring, the diaphragm motor gear 34 is meshed with a diaphragm adjusting ring gear disposed on the diaphragm adjusting ring, and the diaphragm motor gear is driven to rotate by the diaphragm motor 311; two diaphragm micro switches 39 are arranged along the rotation direction of the diaphragm adjusting ring, and a diaphragm blocking nail 310 arranged on the outer side of the diaphragm adjusting ring is arranged between the two diaphragm micro switches.

When the light adjusting component works, after the diaphragm motor is powered on, the diaphragm adjusting ring is driven to rotate, and the diaphragm sheet component follows the diaphragm adjusting ring to do rotary motion, so that the opening size of the diaphragm is changed, and the diaphragm variable function is realized.

The diaphragm caliber is used for solving the sizes of all parts of the diaphragm by selecting a proper scale and calculating the number of diaphragm sheets according to the predicted ring rotation angle, wherein the design is that the ring rotation angle and the aperture area form a linear relation, namely the scales of the ring are equally spaced. The number of the diaphragm sheets is calculated and measured according to a single-arc variable diaphragm drawing method. Meanwhile, when the diaphragm sheet moves, the diaphragm movable pin falls off from the moving groove of the diaphragm moving ring with the serial number 33 due to manufacturing and processing errors of the diaphragm, so that the movable end of the diaphragm sheet needs to be subjected to position offset correction, namely the movable end position needs to be offset outwards, and meanwhile, after the movable end is offset, the relative positions of two end points of the whole diaphragm sheet can be changed, and the fixed end of the diaphragm sheet needs to be subjected to position offset correction, namely the fixed end position is offset inwards. The diaphragm sheet after offset correction has directivity in assembly, which can also make up the defect that the two ends of the diaphragm sheet cannot be ensured to be symmetrical in processing.

In the present embodiment, the focusing lens group 13, the magnification-varying lens group 21, the compensation lens group 29 and the rear fixed lens group 402 are further included, which are sequentially arranged from left to right; the focusing lens group comprises a biconvex lens A, an orthodontics lens B, an orthodontics lens C and an orthodontics lens D, wherein the orthodontics lens B and the orthodontics lens C form a first gluing group; the zoom lens group comprises a positive crescent lens E, a biconvex lens F, a biconcave lens G and a negative crescent lens H, wherein the positive crescent lens E, the biconvex lens F and the biconcave lens G form a second gluing group; the compensating lens group comprises a negative crescent lens I, a positive crescent lens J, a positive crescent lens K and a biconvex lens L, wherein the positive crescent lens K and the biconvex lens L form a third gluing group; the rear fixed lens group comprises a plano-convex lens M, a biconcave lens N, a positive crescent lens O, a biconvex lens P, a biconcave lens Q, a negative crescent lens R, a biconvex lens S and a negative crescent lens T, wherein the plano-convex lens M and the biconcave lens N form a fourth bonding group, the biconvex lens P and the biconcave lens Q form a fifth bonding group, and the biconvex lens S and the negative crescent lens T form a sixth bonding group.

The air gap between the biconvex lens A and the first bonding group is 0.2mm, and the air gap between the first bonding group and the positive crescent lens D is 0.19mm; the air interval between the negative crescent lens H and the second bonding group is 50.42mm, and the air interval between the second bonding group and the negative crescent lens H is 1.95mm; the air interval between the negative crescent lens H and the negative crescent lens I is 83.28mm, and the air interval between the negative crescent lens I and the positive crescent lens J is 0.15mm; the air interval between the positive crescent lens J and the third gluing group is 0.15mm; the air interval between the third bonding group and the fourth bonding group is 8.31mm, and the air interval between the fourth bonding group and the positive crescent lens O is 0.67mm; the air interval between the positive crescent lens O and the fifth bonding group is 37.51mm, the air interval between the fifth bonding group and the negative crescent lens R is 13.45mm, and the air interval between the negative crescent lens R and the sixth bonding group is 11.73mm.

The air interval is a theoretical interval in design, and can be influenced by various external factors in actual assembly and adjustment, such as processing errors of structural members, refractive indexes of lens materials, relative position deviation in assembly and adjustment can lead to micro-change of the air interval between lenses in optimal imaging, so that mechanical parts with different thicknesses are adopted to be matched between lenses with larger influence on part of the air interval, and proper parts are selected in use.

In this embodiment, the rear fixing assembly and the detector assembly are connected by a flange, and the rear fixing assembly includes a rear fixing lens barrel 401 and a rear fixing lens group 402 installed in the rear fixing lens barrel.

The detector assembly 50 described above is conventional. When the detector component is installed, the rear fixing component is connected with the camera component through a flange, six degrees of freedom in the camera adjusting process are controlled through the clamping groove structure 501 respectively, so that the position accuracy of the target surface of the camera is controlled and adjusted, the debugging efficiency of the lens is guaranteed, and the imaging quality of the lens is improved.

Example 2: on the basis of embodiment 1, focusing motor, zoom motor and diaphragm motor all adopt the knapsack mounting means, and the camera lens is whole succinct, pleasing to the eye, and the motor gear that corresponding motor was joined in marriage is equipped with the mechanism of skidding, and motor gear compresses tightly the pressure spring and skids the gasket fixedly through lock nut, and the gear skids when the motor is overload, protects the motor.

When the focusing motor operates, the focusing cam is rotated by driving the gear of the focusing motor to rotate. The focusing cam is connected with the focusing main lens barrel through three focusing guide pin assemblies which are uniformly distributed. The guide nails of the focusing guide nail assembly make the focusing lens barrel move linearly and reciprocally under the action of three uniformly-distributed milling straight grooves formed on the focusing main lens barrel. Thus, the circular motion of the focusing cam drives the focusing lens group to do linear motion, and the focusing motor can drive the focusing group to move back and forth by reversing forward and backward, so that the focusing purpose is realized.

When the zoom motor operates, the zoom cam is driven to rotate by driving the gear of the zoom motor to rotate. The zoom cam is connected with the zoom sliding frame through a roller on the zoom guide pin component. The zoom guide pin assembly makes the zoom assembly and the compensation assembly do linear reciprocating motion under the action of two straight grooves on the zoom main lens cone. Thus, the circular motion of the zoom cam drives the zoom component and the compensation component to do linear motion. The positive and negative rotation of the variable-magnification motor can drive the variable-magnification mechanism to move forwards and backwards, so that the variable-magnification aim is fulfilled.

The focusing assembly, the continuous zooming assembly and the dimming assembly are connected in a threaded and main front matching way, so that concentricity requirements can be effectively ensured, the external dimension is reduced, and the lens is as light and small as possible. Meanwhile, the convenience of processing, assembling and debugging is considered.

The joint of the threads of the lens is glued and fastened, and the fastening screws at the conical ends are nested and glued and fastened, so that firm connection is ensured, and performances such as vibration resistance and impact resistance are improved.

The inner walls of the pressing rings, the spacing rings and the like of the lens are processed with insections with proper widths of the noose strips, and are coated with the vanishing paint, and the aim of inhibiting stray light is fulfilled by utilizing the scattering and absorption of stray light radiation by the inner wall of the lens barrel.

The continuous zooming component is used for focusing targets with different distances, so that the defect of small depth of field of the large-caliber lens is overcome; meanwhile, the focusing component is utilized to perform temperature focusing on the image plane drifting caused by temperature, so that the lens can still image well in a high-low temperature state.

The lens has the functions of electric focusing, electric continuous zooming, aperture size adjustment, image output and the like, and achieves the effects of total length and compact structure of the system through precise matching among structural members, thereby completing the light-type long-focus zoom lens.

In this embodiment, the compact variable-focus dimmable lens is designed to meet the following criteria:

1) Caliber: more than or equal to 90mm;

2) Focal length: 120mm plus or minus 3 percent to 720mm plus or minus 2 percent;

3) F number: f#8;

4) Total lens length: the overall dimension of the whole machine is less than or equal to (length is multiplied by width is multiplied by height) and is less than or equal to 330mm, 400mm is multiplied by 140mm is multiplied by 125mm;

5) Coplanarity requirements: at the temperature of 20+/-5 ℃, the position change of the image surface is less than or equal to +/-0.02 mm;

6) Coaxial requirements: in the zooming process, the shake of an optical axis is less than or equal to 2 pixels;

7) Distortion: when the focal length is 120mm, the distortion of the full field of view is less than or equal to 3 percent, and when the focal length is 720mm, the distortion of the full field of view is less than or equal to 2 percent;

8) Optical transmittance: more than or equal to 70 percent.

9) Focusing range:

distance is 0.1km to infinity (object space);

temperature: -30 to +60 ℃;

the focusing stroke needs to leave sufficient allowance, and the temperature compensation needs to be considered;

10 Focusing step size): less than or equal to 0.008mm (converted to an image plane);

11 Focusing time): less than or equal to 3 seconds (whole travel range);

12 Time of variable magnification): less than or equal to 6 seconds;

13 Focal length output accuracy): less than or equal to 1 percent;

14 Transfer function (measured): meridian sagittal average requirements;

15 Detector model): VSP80;

target surface size: 19.2mm by 10.8mm;

pixel size: 10 mu m;

target surface resolution: 1920×1080.

Any of the above-described embodiments of the present utility model disclosed herein, unless otherwise stated, if they disclose a numerical range, then the disclosed numerical range is the preferred numerical range, as will be appreciated by those of skill in the art: the preferred numerical ranges are merely those of the many possible numerical values where technical effects are more pronounced or representative. Since the numerical values are more and cannot be exhausted, only a part of the numerical values are disclosed to illustrate the technical scheme of the utility model, and the numerical values listed above should not limit the protection scope of the utility model.

Meanwhile, if the above utility model discloses or relates to parts or structural members fixedly connected with each other, the fixed connection may be understood as follows unless otherwise stated: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).

If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is used merely to facilitate distinguishing between components and not otherwise stated, and does not have a special meaning.

In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto unless otherwise stated.

Any part provided by the utility model can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.

Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present utility model and are not limiting; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.

Claims (6)

1. The compact zoom adjustable lens is characterized by comprising a connecting base, and a focusing assembly, a continuous zooming assembly, a dimming assembly, a rear fixing assembly and a detector assembly which are positioned on the connecting base and are sequentially arranged from left to right;

the device also comprises a focusing lens group, a zoom lens group, a compensation lens group and a rear fixed lens group which are sequentially arranged from left to right; the focusing lens group comprises a biconvex lens A, an orthodontics lens B, an orthodontics lens C and an orthodontics lens D, wherein the orthodontics lens B and the orthodontics lens C form a first gluing group; the zoom lens group comprises a positive crescent lens E, a biconvex lens F, a biconcave lens G and a negative crescent lens H, wherein the positive crescent lens E, the biconvex lens F and the biconcave lens G form a second gluing group; the compensating lens group comprises a negative crescent lens I, a positive crescent lens J, a positive crescent lens K and a biconvex lens L, wherein the positive crescent lens K and the biconvex lens L form a third gluing group; the rear fixed lens group comprises a plano-convex lens M, a biconcave lens N, a positive crescent lens O, a biconvex lens P, a biconcave lens Q, a negative crescent lens R, a biconvex lens S and a negative crescent lens T, wherein the plano-convex lens M and the biconcave lens N form a fourth bonding group, the biconvex lens P and the biconcave lens Q form a fifth bonding group, and the biconvex lens S and the negative crescent lens T form a sixth bonding group.

2. The compact type zoom adjustable lens according to claim 1, wherein the focusing assembly comprises a focusing main lens barrel, a focusing lens group and a focusing guide pin assembly, wherein the focusing lens group and the focusing guide pin assembly are installed in the focusing main lens barrel, a focusing cam is sleeved outside the focusing main lens barrel, a linear chute is arranged on the focusing cam, a straight milling groove is arranged on the focusing main lens barrel, the focusing guide pin assembly penetrates through the linear chute and the straight milling groove to be connected with the focusing lens group, a focusing motor gear and a focusing potentiometer gear are respectively arranged on the outer side of the focusing cam, the focusing motor gear and the focusing potentiometer gear are respectively meshed with a focusing gear ring arranged on the focusing cam, the focusing motor gear is driven to rotate by a focusing motor, and a focusing potentiometer is connected to the middle part of the focusing potentiometer gear; two focusing micro switches are arranged along the rotation direction of the focusing cam, and focusing limiting nails positioned between the two focusing micro switches are arranged outside the focusing cam; the focusing guide pin assembly comprises a guide pin and two rollers arranged on the upper part of the guide pin, and a transition ring is arranged between the two rollers.

3. The compact type variable-focus dimmable lens of claim 1, wherein the continuous-focus assembly comprises a zoom main lens barrel and a zoom cam sleeved outside the zoom main lens barrel, a front row of steel balls and a rear row of steel balls are arranged between the zoom cam and the zoom main lens barrel, and the zoom cam is limited on the zoom main lens barrel by adopting a zoom cam pressing ring; a zoom component and a compensation component are respectively arranged in the zoom main lens barrel; the variable-magnification assembly comprises a variable-magnification guide pin assembly, a variable-magnification carriage and a variable-magnification lens group arranged on the variable-magnification carriage, and the compensation assembly comprises a compensation guide pin assembly, a compensation carriage and a compensation lens group arranged on the compensation carriage; the zoom cam is provided with a zoom curve groove and a compensation curve groove, zoom main lens barrel is provided with a zoom straight groove and a compensation straight groove at the positions of the zoom curve groove and the compensation curve groove, a zoom guide pin component passes through the zoom curve groove and the zoom straight groove and is connected with a zoom carriage, the compensation guide pin component passes through the compensation curve groove and the compensation straight groove and is connected with the compensation carriage, a zoom motor gear and a zoom potentiometer gear are arranged outside the zoom main lens barrel, the zoom motor gear and the zoom potentiometer gear are respectively meshed with a zoom gear ring arranged on the zoom cam, the zoom motor gear is driven to rotate by a zoom motor, and the zoom potentiometer gear is connected with a zoom potentiometer; two zooming micro switches are arranged along the circumference of the variable Jiao Tulun, and a zooming limiting nail arranged on the outer side of the zooming cam is arranged between the two zooming micro switches.

4. The compact zoom adjustable lens according to claim 1, wherein the light adjusting component comprises a diaphragm sheet component, a diaphragm seat, a diaphragm moving ring and a diaphragm adjusting ring, wherein the diaphragm moving ring and the diaphragm adjusting ring are arranged on the diaphragm seat, the diaphragm moving ring is limited on the diaphragm seat by a diaphragm moving ring pressing ring, the diaphragm sheet component comprises a diaphragm sheet, diaphragm moving pins and diaphragm sheet fixing pins, the diaphragm moving pins are respectively arranged at two ends of the diaphragm sheet, the diaphragm moving pins are arranged in moving slots arranged on the diaphragm seat, the diaphragm sheet fixing pins are arranged in straight slots arranged on the diaphragm moving ring, the diaphragm seat is provided with moving corner milling slots for moving the diaphragm sheet, the diaphragm moving ring is connected with the diaphragm adjusting ring in a matched manner by the diaphragm pulling pins, the diaphragm adjusting ring is limited by the diaphragm adjusting ring pressing ring, a diaphragm motor gear is arranged outside the diaphragm adjusting ring, and is meshed with the diaphragm adjusting ring pressing ring arranged on the diaphragm adjusting ring, and the diaphragm motor gear is driven to rotate by a diaphragm motor; two diaphragm micro switches are arranged along the rotation direction of the diaphragm adjusting ring, and diaphragm blocking nails arranged on the outer side of the diaphragm adjusting ring are arranged between the two diaphragm micro switches.

5. A compact variable focal length tunable optical lens as claimed in claim 1, wherein an air gap between the lenticular lens a and the first cemented group is 0.2mm, and an air gap between the first cemented group and the positive crescent lens D is 0.19mm; the air interval between the negative crescent lens H and the second bonding group is 50.42mm, and the air interval between the second bonding group and the negative crescent lens H is 1.95mm; the air interval between the negative crescent lens H and the negative crescent lens I is 83.28mm, and the air interval between the negative crescent lens I and the positive crescent lens J is 0.15mm; the air interval between the positive crescent lens J and the third gluing group is 0.15mm; the air interval between the third bonding group and the fourth bonding group is 8.31mm, and the air interval between the fourth bonding group and the positive crescent lens O is 0.67mm; the air interval between the positive crescent lens O and the fifth bonding group is 37.51mm, the air interval between the fifth bonding group and the negative crescent lens R is 13.45mm, and the air interval between the negative crescent lens R and the sixth bonding group is 11.73mm.

6. The compact variable focus lens as claimed in claim 1, wherein the rear fixing assembly and the probe assembly are connected by a flange, and the rear fixing assembly comprises a rear fixing lens barrel and a rear fixing lens group installed in the rear fixing lens barrel.