CN106125271A - Zoom short-throw projection camera lens and Zooming method thereof - Google Patents

Zoom short-throw projection camera lens and Zooming method thereof Download PDF

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Publication number
CN106125271A
CN106125271A CN201610699279.6A CN201610699279A CN106125271A CN 106125271 A CN106125271 A CN 106125271A CN 201610699279 A CN201610699279 A CN 201610699279A CN 106125271 A CN106125271 A CN 106125271A
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China
Prior art keywords
zoom
lens
hurdle
crescent moon
light hurdle
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CN201610699279.6A
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Chinese (zh)
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CN106125271B (en
Inventor
刘辉
周宝藏
张新彬
钟兆铨
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福建福光股份有限公司
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Priority to CN201610699279.6A priority Critical patent/CN106125271B/en
Publication of CN106125271A publication Critical patent/CN106125271A/en
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Publication of CN106125271B publication Critical patent/CN106125271B/en

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B15/00Optical objectives with means for varying the magnification
    • G02B15/14Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/163Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
    • G02B15/167Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
    • G02B15/17Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +--
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/021Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/026Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens

Abstract

The present invention relates to a kind of zoom short-throw projection camera lens, the rear fixing group of E, front fixing group of A of compensation group C, iris D and the positive light coke that are sequentially provided with the front fixing group A of positive light coke, zoom group B of negative power, negative power along light incident direction from left to right in the optical system of camera lens includes plano-convex plus lens A 1, crescent moon minus lens A 2, the crescent moon plus lens A 3 set gradually from left to right;Zoom group B includes double-concave negative lens B 1, the crescent moon plus lens B 2 set gradually from left to right;Compensation group C includes crescent moon minus lens C 1, and the most fixing group E is constant in the position of iris D;Rear fixing group E includes crescent moon plus lens E 1, biconvex lens E 2, the crescent moon minus lens E 3 and biconvex positive lens E 4 set gradually from left to right, the optical system structure of this zoom short-throw projection camera lens is simple, the object distance of 190mm can realize clear projection, lens construction length is short.

Description

Zoom short-throw projection camera lens and Zooming method thereof

Technical field

The present invention relates to a kind of zoom short-throw projection camera lens and Zooming method thereof.

Background technology

Current various Zooming-projection camera lens emerges in an endless stream, but the application of the projection object distance of current Zooming-projection camera lens is more than One meter.When these projection lens are for object distance projection imaging within 200mm, because the impact of projection object distance, cause projection lens The coma effect of head, it is impossible to project image clearly, and the number of lenses of these projection lens is more, the assembling of eyeglass knot Structure is complicated, and the compactest of lens construction causes volume relatively big, carries very inconvenient.

Summary of the invention

It is an object of the invention to for above weak point, it is provided that a kind of simple in construction, the compact assembling structure of eyeglass Zoom short-throw projection camera lens and Zooming method.

The technical scheme is that, a kind of zoom short-throw projection camera lens, in the optical system of described camera lens along light from From left to right incident direction is sequentially provided with front fixing group of A of positive light coke, zoom group B of negative power, the compensation group of negative power Rear fixing group of E of C, iris D and positive light coke, described front fixing group A include that the plano-convex set gradually from left to right is the most saturating Mirror A-1, crescent moon minus lens A-2, crescent moon plus lens A-3;Described zoom group B includes the double-concave negative lens set gradually from left to right B-1, crescent moon plus lens B-2;Described compensation group C includes crescent moon minus lens C-1, and the position of described iris D is fixed the most afterwards E is constant for group;After described, fixing group E includes that the crescent moon plus lens E-1 set gradually from left to right, biconvex lens E-2, crescent moon are born thoroughly Mirror E-3 and biconvex positive lens E-4.

Further, between described front fixing group A and zoom group B, the airspace of short Jiao is 3.26mm, the air of focal length Being spaced apart 16.35mm, between described compensation group C and iris D, the airspace of short Jiao is 5.43mm, the airspace of focal length For 1.90mm.

Further, described plano-convex plus lens A-1 and crescent moon minus lens A-2 center are close together, described crescent moon plus lens E-1 and biconvex lens E-2 center are close together, described crescent moon minus lens A-2 and crescent moon plus lens A-3 composition glued group, concave-concave The glued group of minus lens B-1 and crescent moon plus lens B-2 composition, the glued group of biconvex lens E-2 and crescent moon minus lens E-3 composition, described The center air of crescent moon minus lens E-3 and biconvex positive lens E-4 is spaced apart 18.52mm, described biconvex positive lens E-4 and arrives image planes Airspace is 24.37mm, and the airspace of described plano-convex plus lens A-1 and crescent moon minus lens A-2 is 0.1mm, described crescent moon The airspace of plus lens E-1 and biconvex lens E-2 is 0.1mm.

Further, the frame for movement of described camera lens includes the focusing set gradually from left to right along the incident direction of light Assembly, zoom assembly, compensation assembly, cam pack, iris assembly, described front fixing group A is located in focusing component, described Zoom group B is located in zoom assembly, and described compensation group C is located in compensation assembly, and described iris D and rear fixing group of E are located at In iris assembly.

Further, described iris assembly includes that light hurdle seat, the outside of described smooth hurdle seat are provided with light hurdle motor, Guang Lan Potentiometer and in order to control the microswitch of openings of sizes position, light hurdle, described microswitch is arranged on by light hurdle limited support On light hurdle seat, one end of described smooth hurdle seat is arranged with light hurdle rotating ring, is provided with light between the end of described smooth hurdle rotating ring and light hurdle seat Hurdle sheet, described smooth hurdle sheet is through rivet interlacement, and one end of light hurdle sheet is fixed on light hurdle seat, and the other end is arranged on light hurdle rotating ring, Described smooth hurdle motor and light hurdle potentiometer are arranged on light hurdle seat by light hurdle motor rack, and the output shaft of described smooth hurdle motor sets Having light hurdle motor gear, the peripheral part of described smooth hurdle seat to be provided with light hurdle regulation ring, light hurdle regulation ring is provided with light hurdle regulation ring tooth Wheel, described smooth hurdle motor gear engages with light hurdle regulation rim gear wheel, drives light hurdle regulation ring to rotate, and described smooth hurdle regulation ring is through light Hurdle regulation ring trim ring is fixed on light hurdle seat, and regulation ring in described smooth hurdle is dialled nail with light hurdle rotating ring by light hurdle and is connected, described smooth hurdle Connecting on potentiometer and have light hurdle potentiometer gear, described smooth hurdle potentiometer gear engages with light hurdle regulation ring, and described crescent moon is the most saturating Mirror E-1, biconvex lens E-2, crescent moon minus lens E-3 are arranged at the interior forward end of light hurdle seat, and described biconvex positive lens E-4 is arranged at The Internal back end of light hurdle seat, is provided with spacer ring A, described biconvex positive lens between described crescent moon minus lens E-3 and biconvex positive lens E-4 E-4 is provided with trim ring in the rear end of light hurdle seat, is provided with spacer ring B, described light between described crescent moon plus lens E-1 and biconvex lens E-2 Light hurdle rotating ring trim ring it is provided with between hurdle rotating ring and light hurdle seat.

Further, the frame for movement of described camera lens also includes that body tube, described zoom assembly include being positioned at body tube The zoom balladeur train in internal stage casing, the inside of described zoom balladeur train is provided with zoom lens barrel, and described zoom lens barrel is by being threadably mounted at On zoom balladeur train;Described compensation assembly includes the compensation balladeur train being positioned at the inside back segment of body tube, the inside of described compensation balladeur train Being provided with compensation lens barrel, described compensation lens barrel is by being threadably mounted on compensation balladeur train;Described zoom balladeur train is the most logical with compensation balladeur train Crossing to grind to coordinate with body tube and be arranged on body tube, the outside posterior segment of described body tube is provided with zoom cam, described zoom Cam is placed on body tube by steel ball, in order to form rolling bearing, and locks through bearing pressure ring and zoom cam trim ring;Described Offer on zoom cam by the optical zoom equation of motion requirement process zoom, compensating curve groove, described zoom cam with Zoom balladeur train, compensation balladeur train link together through zoom guide pin assembly and compensation guide pin assembly;Described zoom guide pin assembly and benefit Repay guide pin assembly to be made up of zoom roller one, zoom lead ring, zoom guide pin, zoom roller two;The outside of described body tube is provided with Power zoom mechanism, described power zoom mechanism includes zoom motor and microswitch two, and described zoom motor is by zoom electricity Machine support and zoom motor column are arranged on body tube, and described microswitch two is arranged on primary mirror by zoom limit switch frame On cylinder;The change having zoom motor gear, the periphery of described zoom cam to be provided with annular is connected on the output shaft of described zoom motor Times cam wheel, described zoom motor gear engages with zoom cam wheel, and described body tube is provided with two in order to limit change Times guide pin assembly, compensating the straight trough of guide pin assembly, the interior forward end of described body tube is arranged with front group of lens barrel, described before fixing group A is arranged in front group of lens barrel, and the front end of described plano-convex plus lens A-1 is provided with front group of trim ring, described plano-convex plus lens A-1 and crescent moon It is provided with spacer ring C between minus lens A-2, is provided with front group between described front group lens barrel and body tube and adjusts pad, described zoom lens barrel And being provided with zoom between zoom balladeur train and adjust pad, described zoom group B is arranged in zoom lens barrel, described double-concave negative lens B-1 Rear end be provided with zoom trim ring, described crescent moon minus lens C-1 be arranged on compensation lens barrel in, the rear end of described crescent moon minus lens C-1 It is provided with compensation trim ring.

The Zooming method of a kind of zoom short-throw projection camera lens, comprises the following steps:

(1) rotor of zoom motor does positive and negative rotary motion, drives zoom cam to do corresponding rotation;

(2) zoom, compensating curve groove and zoom guide pin assembly, compensate guide pin assembly drive zoom balladeur train, compensate balladeur train by zoom, The mode of compensating curve groove is moved, and under straight trough limits, zoom balladeur train, the rotary motion of compensation balladeur train become linear motion and carry out Zoom.

Compared with prior art, the method have the advantages that the optical system of (1) this zoom short-throw projection camera lens Simple in construction, the compact assembling structure of eyeglass, lens construction length is short, and volume is little easy to carry;(2) this zoom short-throw projection mirror Head can realize the continuous vari-focus of 2.1 times to the object distance of 190mm, and the aperture of camera lens reaches F2.8, MTF and is more than at 60lp/mm 0.6;(3) projection ratio can be at 2.4~4.8 consecutive variations.

Accompanying drawing explanation

Below in conjunction with the accompanying drawings patent of the present invention is further illustrated.

Fig. 1 is the optical system schematic diagram of this inventive embodiments;

Fig. 2 is the frame for movement schematic diagram of this inventive embodiments;

Fig. 3 is the structural representation one of the iris assembly of this inventive embodiments;

Fig. 4 is the structural representation two of the iris assembly of this inventive embodiments;

Fig. 5 is the structural representation three of the iris assembly of this inventive embodiments;

Fig. 6 is the zoom assembly of this inventive embodiments, the structural representation one of compensation assembly;

Fig. 7 is the zoom assembly of this inventive embodiments, the structural representation two of compensation assembly;

Fig. 8 is the zoom assembly of this inventive embodiments, the structural representation three of compensation assembly;

Fig. 9 is the structural representation of the straight trough of this inventive embodiments;

Figure 10 is that this inventive embodiments is schemed in image quality MTF of short Jiao;

Figure 11 is that this inventive embodiments is schemed in image quality MTF of focal length;

In figure:

Fixing group A before A-;B-zoom group B;C-compensation group C;D-iris D;Fixing group E after E-;A-1 plano-convex plus lens A-1; A-2 crescent moon minus lens A-2;A-3 crescent moon plus lens A-3;B-1 double-concave negative lens B-1;B-2 crescent moon plus lens B-2;C-1 crescent moon is born Lens C-1;E-1 crescent moon plus lens E-1;E-2 biconvex lens E-2;E-3 crescent moon minus lens E-3;E-4 biconvex positive lens E-4;1- Focusing component;2-zoom assembly;201-zoom balladeur train;202-zoom lens barrel;3-compensates assembly;31-compensates balladeur train;32-compensates Lens barrel;4-cam pack;5-iris assembly;51-light hurdle seat;52-light hurdle motor;53-light hurdle potentiometer;54-fine motion is opened Close;55-light hurdle limited support;56-light hurdle rotating ring;57-light hurdle sheet;58-light hurdle motor rack;59-light hurdle motor gear;510-light Hurdle regulation ring;511-light hurdle regulation rim gear wheel;512-light hurdle regulation ring trim ring;513-light hurdle potentiometer gear;514-spacer ring A; 515-trim ring;516-spacer ring B;517-light hurdle rotating ring trim ring;6-body tube;7-zoom cam;8-bearing pressure ring;9-zoom cam Trim ring;10-zoom roller one;11-zoom lead ring;12-zoom guide pin;13-zoom roller two;14-zoom motor;15-fine motion Switch two;16-zoom electric machine support;17-zoom motor column;18-zoom limit switch frame;19-zoom motor gear;20- Zoom cam wheel;21-straight trough;211-zoom straight trough;212-compensates straight trough;Lens barrel is organized before 22-;Trim ring is organized before 23-;24-every Circle C;Before 25-, group adjusts pad;26-zoom adjusts pad;27-zoom trim ring;28-compensates trim ring.

Detailed description of the invention

The present invention is further described with detailed description of the invention below in conjunction with the accompanying drawings.

As shown in Fig. 1~11, a kind of zoom short-throw projection camera lens, in the optical system of described camera lens along light from left to right Incident direction is sequentially provided with front fixing group of A of positive light coke, zoom group B of negative power, compensation group C of negative power, variable Diaphragm D and rear fixing group of E of positive light coke, described before fixing group A include setting gradually from left to right plano-convex plus lens A-1, Crescent moon minus lens A-2, crescent moon plus lens A-3;Described zoom group B includes double-concave negative lens B-1, the moon set gradually from left to right Tooth plus lens B-2;Described compensation group C includes crescent moon minus lens C-1, and the position of described iris D the most fixing group E is not Become;After described, fixing group E includes crescent moon plus lens E-1, biconvex lens E-2, the crescent moon minus lens E-3 set gradually from left to right With biconvex positive lens E-4.

In the present embodiment, between described front fixing group A and zoom group B, the airspace of short Jiao is 3.26mm, focal length Airspace is 16.35mm, and between described compensation group C and iris D, the airspace of short Jiao is 5.43mm, the air of focal length Be spaced apart 1.90mm, described before airspace between fixing group A and zoom group B be zooming adjustment amount, described compensation group C with can The airspace of darkening door screen D changes along with the change in location of zoom group B to play tune as effect.

In the present embodiment, described plano-convex plus lens A-1 and crescent moon minus lens A-2 center are close together, and described crescent moon is just Lens E-1 and biconvex lens E-2 center are close together, the glued group of described crescent moon minus lens A-2 and crescent moon plus lens A-3 composition, The glued group of double-concave negative lens B-1 and crescent moon plus lens B-2 composition, the glued group of biconvex lens E-2 and crescent moon minus lens E-3 composition, The center air of described crescent moon minus lens E-3 and biconvex positive lens E-4 is spaced apart 18.52mm, and described biconvex positive lens E-4 is to picture The airspace in face is 24.37mm, and the airspace of described plano-convex plus lens A-1 and crescent moon minus lens A-2 is 0.1mm, described The airspace of crescent moon plus lens E-1 and biconvex lens E-2 is 0.1mm.

In the present embodiment, the frame for movement of described camera lens includes setting gradually from left to right along the incident direction of light Focusing component 1, zoom assembly 2, compensation assembly 3, cam pack 4, iris assembly 5, described front fixing group A is located at focusing group In part, described zoom group B is located in zoom assembly, and described compensation group C is located in compensation assembly, described iris D and rear solid Surely group E is located in iris assembly.

In the present embodiment, described iris assembly includes that light hurdle seat 51, the outside of described smooth hurdle seat are provided with light hurdle electricity Machine 52, light hurdle potentiometer 53 and in order to control the microswitch 54 of openings of sizes position, light hurdle, described microswitch passes through light hurdle Limited support 55 is arranged on light hurdle seat, and one end of described smooth hurdle seat is arranged with light hurdle rotating ring 56, described smooth hurdle rotating ring and Guang Lan Being provided with light hurdle sheet 57 between the end of seat, described smooth hurdle sheet is through rivet interlacement, and one end of light hurdle sheet is fixed on light hurdle seat, another End is arranged on light hurdle rotating ring, and described smooth hurdle motor and light hurdle potentiometer are arranged on light hurdle seat by light hurdle motor rack 58, institute The output shaft stating light hurdle motor is provided with light hurdle motor gear 59, and the peripheral part of described smooth hurdle seat is provided with light hurdle regulation ring 510, light Hurdle regulation ring is provided with light hurdle regulation rim gear wheel 511, and described smooth hurdle motor gear engages with light hurdle regulation rim gear wheel, drives light hurdle Regulation ring rotates, and regulation ring in described smooth hurdle is fixed on light hurdle seat through light hurdle regulation ring trim ring 512, described smooth hurdle regulation ring and light Hurdle rotating ring is dialled nail by the light hurdle of preparation and is connected, and dials nail when light hurdle regulation ring rotates with the drive of light hurdle motor by light hurdle Thus also driving light hurdle rotating ring to rotate, the rotation of Pian Suiguang hurdle, described smooth hurdle rotating ring realizes the switching of openings of sizes, described smooth hurdle Connecting on potentiometer and have light hurdle potentiometer gear 513, described smooth hurdle potentiometer gear engages, when aperture is with light with light hurdle regulation ring When the rotation of hurdle regulation ring changes, make light hurdle potentiometer corresponding along with also producing by the transmission of light hurdle potentiometer gear Rotate, light hurdle potentiometer resistance generation respective change, corresponding potentiometer changing value can be taken out by suitable sample circuit, and pass To control centre, thus realize the display of stop opening size;Otherwise, provide corresponding resistance order by control centre, can Realizing the real-time control in Guang Lan aperture, described crescent moon plus lens E-1, biconvex lens E-2, crescent moon minus lens E-3 are arranged at light hurdle The interior forward end of seat, described biconvex positive lens E-4 is arranged at the Internal back end of light hurdle seat, described crescent moon minus lens E-3 and biconvex It is provided with spacer ring A514, described biconvex positive lens E-4 between plus lens E-4 and is provided with trim ring 515, described crescent moon in the rear end of light hurdle seat It is provided with spacer ring B516 between plus lens E-1 and biconvex lens E-2, between described smooth hurdle rotating ring and light hurdle seat, is provided with light hurdle rotating ring pressure Circle 517.

In the present embodiment, the frame for movement of described camera lens also includes that body tube 6, described zoom assembly include being positioned at primary mirror The zoom balladeur train 201 in the stage casing, inside of cylinder, the inside of described zoom balladeur train is provided with zoom lens barrel 202, and described zoom lens barrel passes through It is threadably mounted on zoom balladeur train;Described compensation assembly includes the compensation balladeur train 31 being positioned at the inside back segment of body tube, described benefit The inside repaying balladeur train is provided with compensation lens barrel 32, and described compensation lens barrel is by being threadably mounted on compensation balladeur train;Described zoom balladeur train All coordinating and be arranged on body tube by grinding with body tube with compensating balladeur train, the outside posterior segment of described body tube is provided with zoom Cam 7, described zoom cam is placed on body tube by steel ball, in order to form rolling bearing and convex through bearing pressure ring 8 and zoom Wheel trim ring 9 is locked;Offer on described zoom cam by the zoom of requirement processing of the optical zoom equation of motion, compensating curve Groove, described zoom cam links together through zoom guide pin assembly and compensation guide pin assembly with zoom balladeur train, compensation balladeur train;Described Zoom guide pin assembly and compensation guide pin assembly are by zoom roller 1, zoom lead ring 11, zoom guide pin 12, zoom roller 2 13 groups Become;The outside of described body tube is provided with power zoom mechanism, and described power zoom mechanism includes zoom motor 14 and microswitch 2 15, described zoom motor is arranged on body tube by zoom electric machine support 16 and zoom motor column 17, and described fine motion is opened Close two to be arranged on body tube by zoom limit switch frame 18;Connect on the output shaft of described zoom motor and have zoom motor tooth Wheel 19, the periphery of described zoom cam is provided with the zoom cam wheel 20 of annular, described zoom motor gear and zoom cam tooth Wheel engagement, when the rotor of zoom motor does positive and negative rotary motion, drives zoom cam to do corresponding rotation, by zoom, benefit Repay curved groove and zoom guide pin assembly, compensate guide pin assembly drive zoom balladeur train, compensation balladeur train by zoom, the side of compensating curve groove Formula is moved, and described body tube is provided with two in order to limit zoom guide pin assembly, the straight trough 21 of compensation guide pin assembly, straight trough 21 points For zoom straight trough 211 and compensation straight trough 212, make zoom balladeur train, the rotary motion of compensation balladeur train become linear motion, strictly control Joining between zoom guide pin assembly and the straight trough compensated on guide pin assembly and the zoom of zoom cam, compensating curve groove and body tube Close gap, it is ensured that zoom assembly and compensate component slippage steadily, without cassette tape, realize zoom assembly and benefit by the rotation of zoom motor Repay assembly and do linear motion back and forth by zoom motion equation requirement, thus realize the consecutive variations function of system focal, described The interior forward end of body tube is arranged with front group of lens barrel 22, and described front fixing group A is arranged in front group of lens barrel, described plano-convex plus lens The front end of A-1 is provided with front group of trim ring 23, is provided with spacer ring C24 between described plano-convex plus lens A-1 and crescent moon minus lens A-2, described Front group is provided with front group and adjusts pad 25, be provided with zoom and adjust between described zoom lens barrel and zoom balladeur train between lens barrel and body tube Pad 26, described zoom group B is arranged in zoom lens barrel, and the rear end of described double-concave negative lens B-1 is provided with zoom trim ring 27, described Crescent moon minus lens C-1 is arranged in compensation lens barrel, and the rear end of described crescent moon minus lens C-1 is provided with compensation trim ring 28.

The Zooming method of a kind of zoom short-throw projection camera lens, comprises the following steps:

(1) rotor of zoom motor does positive and negative rotary motion, drives zoom cam to do corresponding rotation;

(2) zoom, compensating curve groove and zoom guide pin assembly, compensate guide pin assembly drive zoom balladeur train, compensate balladeur train by zoom, The mode of compensating curve groove is moved, and under straight trough limits, zoom balladeur train, the rotary motion of compensation balladeur train become linear motion and carry out Zoom.

In the present embodiment, the optical system being made up of above-mentioned lens set has reached following optical index:

(1) focal length 24 ~ 50.8mm, i.e. zoom rate are 2.1;

(2) projection objective is 190mm;

(3) aperture is F/#=2.8;

(4) target surface size is Φ 14;

(5) image quality is that MTF is more than 0.6 at 66lp/mm;

(6) it is suitable for spectral line scope: 450nm ~ 700nm.

The object, technical solutions and advantages of the present invention are further described by above-listed preferred embodiment, are answered It is understood by, the foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.

Claims (7)

1. a zoom short-throw projection camera lens, it is characterised in that: the most incident along light in the optical system of described camera lens Direction is sequentially provided with front fixing group of A of positive light coke, zoom group B of negative power, compensation group C of negative power, iris D Include that the plano-convex plus lens A-1 set gradually from left to right, crescent moon are born with rear fixing group of E of positive light coke, described front fixing group A Lens A-2, crescent moon plus lens A-3;Double-concave negative lens B-1, crescent moon that described zoom group B includes setting gradually from left to right are the most saturating Mirror B-2;Described compensation group C includes crescent moon minus lens C-1, and the most fixing group E is constant in the position of described iris D;Described Rear fixing group E includes crescent moon plus lens E-1, biconvex lens E-2, crescent moon minus lens E-3 and the biconvex set gradually from left to right Plus lens E-4.
Zoom short-throw projection camera lens the most according to claim 1, it is characterised in that: before described fixing group A and zoom group B it Between the airspace of short Jiao be 3.26mm, the airspace of focal length is 16.35mm, short between described compensation group C and iris D Burnt airspace is 5.43mm, and the airspace of focal length is 1.90mm.
Zoom short-throw projection camera lens the most according to claim 2, it is characterised in that: described plano-convex plus lens A-1 and crescent moon Minus lens A-2 center is close together, and described crescent moon plus lens E-1 and biconvex lens E-2 center are close together, and described crescent moon is negative thoroughly The glued group of mirror A-2 and crescent moon plus lens A-3 composition, double-concave negative lens B-1 and crescent moon plus lens B-2 composition glued group, lenticular The glued group of mirror E-2 and crescent moon minus lens E-3 composition, the center air interval of described crescent moon minus lens E-3 and biconvex positive lens E-4 For 18.52mm, the airspace of described biconvex positive lens E-4 to image planes is 24.37mm, described plano-convex plus lens A-1 and crescent moon The airspace of minus lens A-2 is 0.1mm, and the airspace of described crescent moon plus lens E-1 and biconvex lens E-2 is 0.1mm.
Zoom short-throw projection camera lens the most according to claim 3, it is characterised in that: the frame for movement of described camera lens includes edge Focusing component that the incident direction of light sets gradually from left to right, zoom assembly, compensate assembly, cam pack, iris Assembly, described front fixing group A is located in focusing component, and described zoom group B is located in zoom assembly, and described compensation group C is located at benefit Repaying in assembly, described iris D and rear fixing group of E are located in iris assembly.
Zoom short-throw projection camera lens the most according to claim 4, it is characterised in that: described iris assembly includes light hurdle Seat, the outside of described smooth hurdle seat is provided with light hurdle motor, light hurdle potentiometer and opens in order to control the fine motion of openings of sizes position, light hurdle Closing, described microswitch is arranged on light hurdle seat by light hurdle limited support, and one end of described smooth hurdle seat is arranged with light hurdle rotating ring, Being provided with light hurdle sheet between the end of described smooth hurdle rotating ring and light hurdle seat, described smooth hurdle sheet is through rivet interlacement, and one end of light hurdle sheet is solid Being scheduled on light hurdle seat, the other end is arranged on light hurdle rotating ring, and described smooth hurdle motor and light hurdle potentiometer are pacified by light hurdle motor rack Being contained on light hurdle seat, the output shaft of described smooth hurdle motor is provided with light hurdle motor gear, and the peripheral part of described smooth hurdle seat is provided with light Hurdle regulation ring, light hurdle regulation ring is provided with light hurdle regulation rim gear wheel, and described smooth hurdle motor gear engages with light hurdle regulation rim gear wheel, Driving light hurdle regulation ring to rotate, regulation ring in described smooth hurdle is fixed on light hurdle seat through light hurdle regulation ring trim ring, and described smooth hurdle regulates Ring is dialled nail with light hurdle rotating ring by light hurdle and is connected, and described smooth hurdle potentiometer connects light hurdle potentiometer gear, described smooth hurdle electricity Position device gear engages with light hurdle regulation ring, and described crescent moon plus lens E-1, biconvex lens E-2, crescent moon minus lens E-3 are arranged at light The interior forward end of hurdle seat, described biconvex positive lens E-4 is arranged at the Internal back end of light hurdle seat, and described crescent moon minus lens E-3 is with double Being provided with spacer ring A, described biconvex positive lens E-4 between convex plus lens E-4 and be provided with trim ring in the rear end of light hurdle seat, described crescent moon is the most saturating It is provided with spacer ring B between mirror E-1 and biconvex lens E-2, between described smooth hurdle rotating ring and light hurdle seat, is provided with light hurdle rotating ring trim ring.
Zoom short-throw projection camera lens the most according to claim 5, it is characterised in that: the frame for movement of described camera lens also includes Body tube, described zoom assembly includes the zoom balladeur train being positioned at the stage casing, inside of body tube, and the inside of described zoom balladeur train is provided with Zoom lens barrel, described zoom lens barrel is by being threadably mounted on zoom balladeur train;Described compensation assembly includes being positioned at body tube The compensation balladeur train of portion's back segment, the inside of described compensation balladeur train is provided with compensation lens barrel, and described compensation lens barrel is by being threadably mounted at benefit Repay on balladeur train;Described zoom balladeur train all coordinates and is arranged on body tube by grinding with body tube with compensating balladeur train, described primary mirror The outside posterior segment of cylinder is provided with zoom cam, and described zoom cam is placed on body tube by steel ball, in order to form rolling bearing, And lock through bearing pressure ring and zoom cam trim ring;Offer on described zoom cam and add by the requirement of the optical zoom equation of motion The zoom of work, compensating curve groove, described zoom cam is with zoom balladeur train, compensation balladeur train is through zoom guide pin assembly and compensates guide pin group Part links together;Described zoom guide pin assembly and compensation guide pin assembly are by zoom roller one, zoom lead ring, zoom guide pin, change Times roller two forms;The outside of described body tube is provided with power zoom mechanism, described power zoom mechanism include zoom motor with Microswitch two, described zoom motor is arranged on body tube by zoom electric machine support and zoom motor column, described fine motion Switch two is arranged on body tube by zoom limit switch frame;Connect on the output shaft of described zoom motor and have zoom motor tooth Wheel, the periphery of described zoom cam is provided with the zoom cam wheel of annular, and described zoom motor gear is nibbled with zoom cam wheel Close, described body tube be provided with two in order to limit zoom guide pin assembly, to compensate the straight trough of guide pin assembly, described body tube interior Portion's front end sleeve is provided with front group of lens barrel, and described front fixing group A is arranged in front group of lens barrel, and the front end of described plano-convex plus lens A-1 sets There is front group of trim ring, between described plano-convex plus lens A-1 and crescent moon minus lens A-2, be provided with spacer ring C, described front group lens barrel and body tube Between be provided with front group adjust pad, be provided with between described zoom lens barrel and zoom balladeur train zoom adjust pad, described zoom group B pacify Being contained in zoom lens barrel, the rear end of described double-concave negative lens B-1 is provided with zoom trim ring, and described crescent moon minus lens C-1 is arranged on benefit Repaying in lens barrel, the rear end of described crescent moon minus lens C-1 is provided with compensation trim ring.
7. the Zooming method of a zoom short-throw projection camera lens, it is characterised in that comprise the following steps:
(1) rotor of zoom motor does positive and negative rotary motion, drives zoom cam to do corresponding rotation;
(2) zoom, compensating curve groove and zoom guide pin assembly, compensate guide pin assembly drive zoom balladeur train, compensate balladeur train by zoom, The mode of compensating curve groove is moved, and under straight trough limits, zoom balladeur train, the rotary motion of compensation balladeur train become linear motion and carry out Zoom.
CN201610699279.6A 2016-08-22 2016-08-22 Zoom short-throw projection camera lens and its Zooming method CN106125271B (en)

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CN107315238A (en) * 2017-08-17 2017-11-03 福建福光股份有限公司 A kind of high-resolution zoom camera lens

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CN102608732A (en) * 2011-12-22 2012-07-25 福建福光数码科技有限公司 Large-view-field high-resolution high-rate vehicle-mounted zoom pick-up lens
CN105116526A (en) * 2015-09-21 2015-12-02 福建福光股份有限公司 High-zoom-ratio continuous zooming television pick-up lens and control method thereof
CN206002761U (en) * 2016-08-22 2017-03-08 福建福光股份有限公司 Zoom short-throw projection camera lens

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US4740063A (en) * 1983-09-14 1988-04-26 Asahi Kogaku Kogyo Kabushiki Kaisha Telephoto zoom lens system
JP2008040032A (en) * 2006-08-04 2008-02-21 Casio Comput Co Ltd Zoom lens and projection device
JP2008046319A (en) * 2006-08-15 2008-02-28 Pentax Corp Telephoto zoom lens system
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CN107315238A (en) * 2017-08-17 2017-11-03 福建福光股份有限公司 A kind of high-resolution zoom camera lens
CN107315238B (en) * 2017-08-17 2019-10-25 福建福光股份有限公司 A kind of high-resolution zoom camera lens

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