CN104076496B - The Hartmann sensor continuous zoom relaying camera lens of doubly telecentric - Google Patents

Abstract

The Hartmann sensor continuous zoom relaying camera lens of doubly telecentric belongs to detection field of detecting, the fixing restriction to stigma sample rate of relaying light path enlargement ratio can be overcome, realize increasing relaying light path enlargement ratio when pupil sample rate declines, improve the positioning precision of image patch barycenter；Ensure the bore measured.This camera lens includes: front group of mirror and rear group of mirror, sets diaphragm between front group of mirror and rear group mirror；Front group of mirror is made up of front telescope direct and front negative mirror, and rear group mirror is made up of rear telescope direct and rear negative mirror, four mirrors be followed successively by from left to right front telescope direct, front negative mirror, rear telescope direct and after bear mirror；They are placed with optical axis, object-image conjugate constant distance.The present invention uses front and rear mirror group near symmetrical structure, to correct the lateral aberrations such as coma, distortion, ratio chromatism, it is ensured that centroid calculation precision.Front and back group focal length changes round about, and common effect makes system magnification consecutive variations.Compensating mutually by front and back organizing interval variation, the degree of freedom that need not entirety before and after making sensor zoom adjusts.

Description

The Hartmann sensor continuous zoom relaying camera lens of doubly telecentric

Technical field

The invention belongs to adaptive optics, active optics, optical detection and large aperture telescope wavefront sensing art, relate to A kind of Hartmann sensor continuous zoom relaying camera lens meeting doubly telecentric characteristic.

Background technology

Hartman wavefront detector is that a kind of phase information optical measurement obtaining wavefront by measuring wavefront slope sets Standby, its basic composition includes microlens array, relaying camera lens and CCD camera.Relaying camera lens is the weight in Hartmann sensor Want assembly, due to microlens array and the restriction of CCD camera product specification, need to relay camera lens by lenticular formation stigma figure As being imaged onto on camera target surface according to certain enlargement ratio, it is achieved lenslet dimension and the coupling of camera pixel size.

Sensitivity and the certainty of measurement of Hartmann sensor are limited by hot spot centroid calculation precision, and the precision of centroid calculation Determined by stigma pixel sampling rate in image planes, be therefore considered as making full use of the pixel count of camera during the design of relay lens group, Sensor is made to reach optimal performance.And when the pupil sample rate (i.e. lenticule sub-aperture number in pupil) of sensor changes Time, for ensureing that the pixel of camera is fully utilized all the time, should correspondingly change relaying light path enlargement ratio.

The method used at present is to change relay lens group, and this not only to develop the relaying camera lens overlapping different multiplying more, and The change of multiplying power is discontinuous, and what is more important needs to carry out installation and debugging on machine, it is clear that cannot meet quick, frequently switch Requirement, especially cannot realize especially performing observation mission switches over.

Summary of the invention

In order to solve problems of the prior art, the Hartmann sensor that the invention provides a kind of doubly telecentric is continuous Zoom relaying camera lens, this camera lens can overcome the fixing restriction to stigma sample rate of relaying light path enlargement ratio, by becoming continuously Relaying camera lens realizes the lenticule focal plane consecutive variations to CCD image planes enlargement ratio again, it is achieved increase when pupil sample rate declines Add relaying light path enlargement ratio, make full use of the pixel count of camera, improve the positioning precision of image patch barycenter；Pupil sample rate increases Time reduce relaying light path enlargement ratio, in making all pupils, stigma picture all falls within target surface, it is ensured that the bore of measurement.

It is as follows that the present invention solves the technical scheme that technical problem used:

The Hartmann sensor continuous zoom relaying camera lens of doubly telecentric, this camera lens includes: front group of mirror and rear group of mirror, front group of mirror And between rear group of mirror, set diaphragm；Front group of mirror is made up of front telescope direct and front negative mirror, and rear group mirror is made up of rear telescope direct and rear negative mirror, and four Sheet mirror be followed successively by from left to right front telescope direct, front negative mirror, rear telescope direct and after bear mirror；They are placed with optical axis, object-image conjugate distance Constant, and meet:

L_h1=f_h2-d_h2

$l\_h{1}^{\′}=\frac{f\_h1\×l\_h1}{f\_h1+l\_h1}=\frac{f\_h1\×(f\_h2-d\_h2)}{f\_h1+f\_h2-d\_h2}$

D_h1=l_h1'

L_h2=f_h1-d_h2

$l\_h{2}^{\′}=\frac{f\_h2\×l\_h2}{f\_h2+l\_h2}=\frac{f\_h2\×(f\_h1-d\_h2)}{f\_h2+f\_h1-d\_h2}$

D_h3=l_h2'

$\begin{array}{c}L\_h=d\_h1+d\_h2+d\_h3=\frac{f\_h1\×(f\_h2-d\_h2)}{f\_h1+f\_h2-d\_h2}+d\_h2+\frac{f\_h2\×(f\_h1-d\_h2)}{f\_h2+f\_h1-d\_h2}\\ =\frac{2\×f\_h1\×f\_h2-d\_h2\×d\_h2}{f\_h1+f\_h2-d\_h2}\end{array}$

$f\_h=\frac{f\_h1\×f\_h2}{f\_h1+f\_h2-d\_h2}$

L_q1=f_q2-d_q2

$l\_q{1}^{\′}=\frac{f\_q1\×l\_q1}{f\_q1+l\_q1}=\frac{f\_q1\×(f\_q2-d\_q2)}{f\_q1+f\_q2-d\_q2}$

D_q1=l_q1'

L_q2=f_q1-d_q2

$l\_q{2}^{\′}=\frac{f\_q2\×l\_q2}{f\_q2+l\_q2}=\frac{f\_q2\×(f\_q1-d\_q2)}{f\_q2+f\_q1-d\_q2}$

D_q3=l_q2'

$\begin{array}{c}L\_q=d\_q1+d\_q2+d\_q3=\frac{f\_q1\×(f\_q2-d\_q2)}{f\_q1+f\_q2-d\_q2}+d\_q2+\frac{f\_q2\×(f\_q1-d\_q2)}{f\_q2+f\_q1-d\_q2}\\ =\frac{2\×f\_q1\×f\_q2-d\_q2\×d\_q2}{f\_q1+f\_q2-d\_q2}\end{array}$

$f\_q=\frac{f\_q1\×f\_q2}{f\_q1+f\_q2-d\_q2}$

Wherein, f_h1 is rear negative mirror focal length, and f_h2 is rear telescope direct focal length, and l_h1 is rear negative mirror object distance, and l_h1 ' is rear negative mirror Image distance, l_h2 is rear telescope direct object distance, and l_h2 ' is rear telescope direct image distance, and d_h2 is rear group of positive and negative mirror interval, and d_h1 is that diaphragm is negative with rear Mirror is spaced, and d_h3 is rear telescope direct and image planes interval；L_h is rear group of mirror total length；F_q1 is front telescope direct focal length, and f_q2 is front negative mirror Focal length, l_q1 is front telescope direct object distance, and l_q1 ' is front telescope direct image distance, and l_q2 is front negative mirror object distance, and l_q2 ' is front negative mirror image away from, d_ Q2 is front group of positive and negative mirror interval, and d_q1 is object plane and front telescope direct interval, and d_q3 is front negative mirror and diaphragm interval；L_q is front group of mirror Total length.

The invention has the beneficial effects as follows: the present invention uses front and rear mirror group approximation right when light path design in both sides, stop position Claim structure, to correct the lateral aberrations such as coma, distortion, ratio chromatism, it is ensured that centroid calculation precision.Front and rear mirror group is respectively adopted Positive and negative two Component Structures, are changed round about by positive and negative mirror group interval in front and back's group, make front and back to organize focal length to phase negative side To change, common effect makes system magnification consecutive variations.Compensate mutually by front and back organizing interval variation, make system image long Degree remains constant, so that the degree of freedom that need not entirety before and after sensor zoom adjusts.Light is made during front group of focal length variations Door screen position is always positioned at its focus, and formation side's telecentricity, to meet lenticular light path form；During rear group of focal length variations together Sample maintains stop position to be positioned at its focus, forms image space telecentricity, so that the axial alignment error of camera does not affect facula mass center location Precision.4 lens constituent elements of system all do axial nonlinear moving, to meet above-mentioned system features, are designed by optical optimization Make system close to the image quality of diffraction limit, and effectively control distortion, to reduce the systematic error of sensor.

Accompanying drawing explanation

Gauss light path is organized after the Hartmann sensor continuous zoom relaying camera lens of Fig. 1 doubly telecentric of the present invention.

Gauss light path is organized before the Hartmann sensor continuous zoom relaying camera lens of Fig. 2 doubly telecentric of the present invention.

The Hartmann sensor continuous zoom relaying camera lens embodiment device figure of Fig. 3 doubly telecentric of the present invention.

Hartmann sensor continuous zoom relaying camera lens embodiment each group mirror amount of movement and rotation of Fig. 4 doubly telecentric of the present invention Rotating cam angle relation.

Hartmann sensor continuous zoom relaying front group of mirror of camera lens embodiment of Fig. 5 doubly telecentric of the present invention and Jiao of rear group of mirror Away from rotate cam angle relation.

The Hartmann sensor continuous zoom relaying camera lens embodiment different multiplying position system of Fig. 6 doubly telecentric of the present invention Astigmatism and distortion curve.

The Hartmann sensor continuous zoom relaying camera lens embodiment system point range figure of Fig. 7 doubly telecentric of the present invention.

Hartmann sensor continuous zoom relaying camera lens embodiment system multiplying power and the rotation cam of Fig. 8 doubly telecentric of the present invention Angle relation.

Detailed description of the invention

With embodiment, the present invention is described in further details below in conjunction with the accompanying drawings.

For correcting the lateral aberration of system, it is provided that center coordination precision, use the version of near symmetrical, before diaphragm After be respectively adopted forward and backward constituent element, front and rear mirror group is formed by positive and negative mirror group, and formation is as doubly telecentric light path.

For obtaining the Gaussian parameters of rear group, two light of trace, as it is shown in figure 1, one is trace from left to right Field of view edge aperture light on axle, for determining the image relation of telescope direct group, another is the outer visual field of axle of trace from right to left Chief ray, for determining the image relation of negative mirror group.

In figure, f_h1 is negative group focal length, and f_h2 is for just organizing focal length, and l_h1 is negative group object distance, and l_h1 ' is negative group image distance, l_h2 For just organizing object distance, l_h2 ' is for just to organize image distance, and d_h2 is positive and negative group of interval, and d_h1 is diaphragm and negative group interval, d_h3 for just organizing with Image planes are spaced；L_h is rear group of total length, i.e. diaphragm and image planes distance；Diaphragm and negative group interval can be drawn by two ray tracings D_h1, just organize and image planes interval d_h3, rear group overall length L_h and organize focal distance f _ h and positive and negative constituent element afterwards and be spaced the relation of d_h2:

L_h1=f_h2-d_h2

$l\_h{1}^{\′}=\frac{f\_h1\×l\_h1}{f\_h1+l\_h1}=\frac{f\_h1\×(f\_h2-d\_h2)}{f\_h1+f\_h2-d\_h2}$

D_h1=l_h1'

L_h2=f_h1-d_h2

$l\_h{2}^{\′}=\frac{f\_h2\×l\_h2}{f\_h2+l\_h2}=\frac{f\_h2\×(f\_h1-d\_h2)}{f\_h2+f\_h1-d\_h2}$

D_h3=l_h2'

$\begin{array}{c}L\_h=d\_h1+d\_h2+d\_h3=\frac{f\_h1\×(f\_h2-d\_h2)}{f\_h1+f\_h2-d\_h2}+d\_h2+\frac{f\_h2\×(f\_h1-d\_h2)}{f\_h2+f\_h1-d\_h2}\\ =\frac{2\×f\_h1\×f\_h2-d\_h2\×d\_h2}{f\_h1+f\_h2-d\_h2}\end{array}$

$f\_h=\frac{f\_h1\×f\_h2}{f\_h1+f\_h2-d\_h2}$

By above formula it can be seen that for keep after group image space telecentricity, by positive and negative constituent element interval change realize focal length While change, diaphragm and negative group, just interval between group and image planes produce nonlinear change the most therewith.

Gauss ray tracing with rear group is similar, as in figure 2 it is shown, be to obtain the Gaussian parameters of front group, trace two Light, one be trace from right to left axle on field of view edge aperture light, for determining the image relation of telescope direct group, another It is the axle outer visual field chief ray of trace from left to right, for determining the image relation of negative mirror group.

In figure, f_q1 is for just organizing focal length, and f_q2 is negative group focal length, l_q1 for just to organize object distance, l_q1 ' for just to organize image distance, l_q2 For negative group of object distance, l_q2 ' is negative group image distance, and d_q2 is positive and negative group of interval, and d_q1 is object plane and is just organizing interval, d_q3 organize for negative and Diaphragm is spaced；L_q is front group of total length, i.e. object plane and diaphragm distance；

Object plane (lenticule focal plane) can be drawn by two ray tracings and just organize interval d_q1, negative group and diaphragm interval d_ Q3, front group of total length L _ q and front group of focal distance f _ q and the relation of positive and negative mirror group interval d_q2；

L_q1=f_q2-d_q2

$l\_q{1}^{\′}=\frac{f\_q1\×l\_q1}{f\_q1+l\_q1}=\frac{f\_q1\×(f\_q2-d\_q2)}{f\_q1+f\_q2-d\_q2}$

D_q1=l_q1'

L_q2=f_q1-d_q2

$l\_q{2}^{\′}=\frac{f\_q2\×l\_q2}{f\_q2+l\_q2}=\frac{f\_q2\×(f\_q1-d\_q2)}{f\_q2+f\_q1-d\_q2}$

D_q3=l_q2'

$\begin{array}{c}L\_q=d\_q1+d\_q2+d\_q3=\frac{f\_q1\×(f\_q2-d\_q2)}{f\_q1+f\_q2-d\_q2}+d\_q2+\frac{f\_q2\×(f\_q1-d\_q2)}{f\_q2+f\_q1-d\_q2}\\ =\frac{2\×f\_q1\×f\_q2-d\_q2\×d\_q2}{f\_q1+f\_q2-d\_q2}\end{array}$

$f\_q=\frac{f\_q1\×f\_q2}{f\_q1+f\_q2-d\_q2}$

By above formula it can be seen that for keeping the front thing side's telecentricity organized, realize focal length by the interval change of positive and negative mirror group While change, object plane and telescope direct group, negative interval nonlinear change the most therewith between mirror group and diaphragm.

Relaying camera lens overall length is forward and backward group of length sum:

$L=L\_q+L\_h=\frac{2\×f\_q1\×f\_q2-d\_q2\×d\_q2}{f\_q1+f\_q2-d\_q2}+\frac{2\×f\_h1\×f\_h2-d\_h2\×d\_h2}{f\_h1+f\_h2-d\_h2}$

Relaying lens ratio: M=f_h/f_q

During zoom, camera lens overall length L is constant, and stop position is not fixed, and may be located at front group of mirror or organizes mirror afterwards Focal position, owing to system does not has the physical optical stop assembly of reality, therefore the change of stop position need not mechanism's realization.

The curve movement of 4 group mirrors corresponding to relaying lens ratio change can be obtained by above-mentioned equation.

The microlens array parameter used in an embodiment is: size of sub-aperture 0.2mm, focal length 7mm, then relaying camera lens thing Side numerical aperture is 0.0143；

Image height (i.e. camera target surface size) is fixed, for 3.42mm × 3.42mm, relaying camera lens enlargement ratio scope be 0.8～ 1.2；Homologue high (lenticule focal plane size) is 4.24mm × 4.24mm～2.83mm × 2.83mm, then effective imaging is micro- Mirror numerical aperture is 21 × 21～14 × 14, therefore can realize pupil sample rate at 2.25 times of range models by relaying camera lens Enclose mating of interior guarantee lenslet dimension and camera target surface.

Design make lens length the shortest by each group of mirror focal length optimization.

In the present embodiment, as it is shown on figure 3, doubly telecentric Hartmann sensor continuous zoom relaying camera lens includes: dead eye With back-up ring 1, rolling bearing 2, the axis of guide 3, cam lever 4, camshaft bearing 5, rotate cam 6, lens mount 7, fixed end base 8, bearing Shaft block ring 9, rear group telescope direct 10, the negative mirror 11 of rear group, bear mirror 12 and front group of telescope direct 13 for front group；Microlens array 14 is bonded and fixed at On lenticule seat 16, lenticule seat 16 is connected on the fixed end base 8 of front end by lenticule seat holding screw 15, passes through bearing Rolling bearing 2 inner ring is connected on fixed end base 8 by shaft block ring 9, is connected in by rotation cam 6 by dead eye back-up ring 1 On rolling bearing 2 outer ring, two axis of guides 3 are connected on fixed end base 8, the lens mount 7 of each group mirror has and joins with the axis of guide 3 The hole closed, lens mount 7 can slide along the axis of guide 3, and cam lever 4 is connected with lens mount 7, and camshaft bearing 5 inner ring is solid with cam lever 4 Even, camshaft bearing 5 outer ring coordinates with the cam curve hole rotating cam 6, can roll in cam curve hole.

The Hartmann sensor continuous zoom relaying camera lens meeting image space telecentricity passes through lenticule seat 16 and the rear end of front end Fixed end base 8 be connected in system light path, rotated by cam 6, the camshaft bearing 5 of each group mirror is along the cam curve of cam 6 Rotate, because the lens mount 7 of each group of mirror is limited by two axis of guides 3, organize in the past telescope direct 13, front group bear mirror 12, afterwards organize and bear mirror 11 and rear group telescope direct 10 can only move along optical axis direction, it is achieved the continuous vari-focus motion of optical design.As shown in Figure 4, horizontal in figure Coordinate is cam angle, and vertical coordinate is the amount of movement track of forward and backward group of totally 4 constituent elements, in figure after group-negative constituent element amount of movement with convex Wheel corner is linear, and front group-negative constituent element amount of movement becomes non-linear relation with cam angle, and front group-just constituent element and rear group- Positive constituent element amount of movement the least；The interval of the corner and each group of mirror and object plane that rotate cam understands, and each group mirror moves song Line smooths, and cam lift angle pressure is little, without obvious flex point, it is easy to rotates cam 6 and realizes；Light path design uses near symmetrical knot Structure, front and back group is formed by positive and negative mirror group, is just organizing employing cemented doublet, and negative group uses simple lens.Positive and negative mirror group interval subtracts Little then focal length increases.As it is shown in figure 5, abscissa is cam angle in figure, vertical coordinate is the focal length variations of forward and backward group, can see Going out front group of focal length and the linear change of cam angle, rear group focal length becomes nonlinear change with cam angle；By in front and back's constituent element Positive and negative mirror group interval changes round about, makes front and back to organize focal length and changes round about, and common effect realizes system multiplying power and becomes Change.Image constant distance during zoom, and meet double telecentric structure, and in full filed stigma image quality close to diffraction pole Limit and little distortion.

The implementation case optical parametric such as table 1:

Before wherein, group telescope direct focal length is 18mm, and front group is born mirror focal length is-56mm, and the negative mirror focal length of rear group is-64.42mm, after Group telescope direct focal length is 17mm.

During zoom, front group of focal length is from 21.97mm to 17.51mm, and about 1.25 times of changes, rear group focal length is 17.58mm ～21mm, about 1.2 times of changes, the common effect of group front and back realizes 0.8～1.2 system multiplying power changes.As shown in Figure 6 and Figure 7, it is being System multiplying power is when being 0.8,1 and 1.2, system astigmatism with distortion curve and point range figure it can be seen that system each multiplying power position distortion is little In 0.6%, the systematic error of camera lens self is the least, and system reaches diffraction limit in each multiplying power position image quality.

As shown in Figure 8, in figure, abscissa is cam angle, and vertical coordinate is the multiplying power change of camera lens, it can be seen that necessarily Corner in, system multiplying power is changed to 1.2 by 0.8, it is possible to achieve lenslet dimension and camera pixel size coupling requirement, be System multiplying power change and rotation cam angle curve are it can be seen that the change of system multiplying power is smooth, without flex point.

Table 1

The continuous zoom lens technical specification that present case realizes is summarized as follows:

System multiplying power M=0.8～1.2；

Zoom ratio Γ=1.5；

Image height 3.42mm × 3.42mm；

Design wave band: λ=486.13nm～656.27nm；

Conjugation distance: 85.68mm.

Claims (5)

1. the Hartmann sensor continuous zoom relaying camera lens of doubly telecentric, it is characterised in that this camera lens includes: front group of mirror and rear group Mirror, sets diaphragm between front group of mirror and rear group mirror；Front group of mirror is made up of front telescope direct and front negative mirror, and rear group mirror is by rear telescope direct and rear negative Mirror forms, four mirrors be followed successively by from left to right front telescope direct, front negative mirror, rear telescope direct and after bear mirror；They are placed with optical axis, image Conjugation constant distance, and meet:

L_h1=f_h2-d_h2

$l\_h{1}^{\′}=\frac{f\_h1\×l\_h1}{f\_h1+l\_h1}=\frac{f\_h1\×(f\_h2-d\_h2)}{f\_h1+f\_h2-d\_h2}$

D_h1=l_h1'

L_h2=f_h1-d_h2

$l\_h{2}^{\′}=\frac{f\_h2\×l\_h2}{f\_h2+l\_h2}=\frac{f\_h2\×(f\_h1-d\_h2)}{f\_h2+f\_h1-d\_h2}$

D_h3=l_h2'

$\begin{array}{c}L\_h=d\_h1+d\_h2+d\_h3=\frac{f\_h1\×(f\_h2-d\_h2)}{f\_h1+f\_h2-d\_h2}+d\_h2+\frac{f\_h2\×(f\_h1-d\_h2)}{f\_h2+f\_h1-d\_h2}\\ =\frac{2\×f\_h1\×f\_h2-d\_h2\×d\_h2}{f\_h1+f\_h2-d\_h2}\end{array}$

$f\_h=\frac{f\_h1\×f\_h2}{f\_h1+f\_h2-d\_h2}$

L_q1=f_q2-d_q2

$l\_q{1}^{\′}=\frac{f\_q1\×l\_q1}{f\_q1+l\_q1}=\frac{f\_q1\×(f\_q2-d\_q2)}{f\_q1+f\_q2-d\_q2}$

D_q1=l_q1'

L_q2=f_q1-d_q2

$l\_q{2}^{\′}=\frac{f\_q2\×l\_q2}{f\_q2+l\_q2}=\frac{f\_q2\×(f\_q1-d\_q2)}{f\_q2+f\_q1-d\_q2}$

D_q3=l_q2'

$\begin{array}{c}L\_q=d\_q1+d\_q2+d\_q3=\frac{f\_q1\×(f\_q2-d\_q2)}{f\_q1+f\_q2-d\_q2}+d\_q2+\frac{f\_q2\×(f\_q1-d\_q2)}{f\_q2+f\_q1-d\_q2}\\ =\frac{2\×f\_q1\×f\_q2-d\_q2\×d\_q2}{f\_q1+f\_q2-d\_q2}\end{array}$

$f\_q=\frac{f\_q1\×f\_q2}{f\_q1+f\_q2-d\_q2}$

Wherein, f_h1 is rear negative mirror focal length, and f_h2 is rear telescope direct focal length, and l_h1 is rear negative mirror object distance, and l_h1 ' is rear negative mirror image Away from, l_h2 is rear telescope direct object distance, and l_h2 ' is rear telescope direct image distance, and d_h2 is rear group of positive and negative mirror interval, and d_h1 is diaphragm and rear negative mirror Interval, d_h3 is rear telescope direct and image planes interval；L_h is rear group of mirror total length；F_q1 is front telescope direct focal length, and f_q2 is that front negative mirror is burnt Away from, l_q1 is front telescope direct object distance, and l_q1 ' is front telescope direct image distance, and l_q2 is front negative mirror object distance, and l_q2 ' is front negative mirror image away from, d_q2 For front group of positive and negative mirror interval, d_q1 is object plane and front telescope direct interval, and d_q3 is front negative mirror and diaphragm interval；L_q is that front group of mirror is total Length.

2. the Hartmann sensor continuous zoom relaying camera lens of doubly telecentric as claimed in claim 1, it is characterised in that group front and back In telescope direct group be cemented doublet, negative mirror group is the simple lens of negative power, and simple lens all bends towards diaphragm.

3. the Hartmann sensor continuous zoom relaying camera lens of doubly telecentric as claimed in claim 1, it is characterised in that in front group Positive and negative mirror and rear group in positive and negative mirror by dorsad motion realize multiplying power change.

4. the Hartmann sensor continuous zoom relaying camera lens of doubly telecentric as claimed in claim 1, it is characterised in that described light Door screen is positioned at front group of mirror or the rear focal position organizing mirror.

5. the Hartmann sensor continuous zoom relaying camera lens of doubly telecentric as claimed in claim 1, it is characterised in that this camera lens Also include: dead eye back-up ring, rolling bearing, the axis of guide, cam lever, camshaft bearing, rotation cam, lens mount, fixed end base With bearing shaft block ring, outside microlens array is connected on fixed end base by lenticule seat, by bearing shaft block ring Rolling bearing inner ring is connected on fixed end base, by dead eye back-up ring, rotation cam is connected in housing washer On, two axis of guides are connected on fixed end base, and lens mount has the hole coordinated with the axis of guide, and cam lever is solid with lens mount Even, camshaft bearing inner ring is connected with cam lever, and camshaft bearing outer ring coordinates with the cam curve hole rotating cam, can be bent at cam String holes rolls, it is achieved lens mount slides at the axis of guide.