CN203572990U - Lobster eye lens in sunflower-shaped arrangement - Google Patents

Abstract

In order to control the distribution of imaging energy and obtain an image with relatively uniform energy distribution, and further fills as many as possible micro-channel tubes in a limited lens space so that the capability of collecting energy is improved, a lobster eye lens in sunflower-shaped arrangement is provided. The lobster eye lens belongs to the technical field of optical elements. The lobster eye lens has multiple micro-channel units. The center of each micro-channel unit has its own polar coordinates on the entire lens surface. Each micro-channel unit is placed on its own coordinates, as described in a formula in the description. In the formula, r represents a polar coordinate diameter, theta represents a polar coordinate angle, and c represents a dimension constant. Compared with arrangement methods of conventional lobster eye lenses, the lobster eye lens in sunflower-shaped arrangement has more arranged micro-channel tubes in the same area, and thus can effectively utilize incident energy; further, since the micro-channels are spirally arranged, more uniform energy distribution can be obtained on an imaging surface, and the generation of a cross image on the imaging surface can be prevented.

Description

The lobster eye lens of heronsbill type arrangement mode

Technical field

The utility model relates to the lobster eye lens of heronsbill type arrangement mode, belongs to optical element technology field.

Background technology

Existing optical system is limited to single optical axis, causes the visual field of system limited, if increase field range, picture element can decline rapidly.How in the situation that not reducing picture element, the visual field of large as far as possible magnifying optics is a difficult problem for optical field always.

Lobster eye is to utilize principle of reflection imaging.The version of lobster eye is rectangle terrace with edge structure.After directional light incident, through terrace with edge inwall, reflex on focal plane.Such lobster ocular structure has two important characteristics: the one, and this lobster ocular form optical system comes from the vision system that imitates lobster, there is the summary incidence reflection mirror of a plurality of passages to form, the Sphere symmetry of this structure determines that this system does not have specific optical axis, the focusing power of going up is in any direction all identical, can realize omnibearing visual field; The 2nd, for any given point, many passages participate in imaging and are by catoptric imaging, and this catoptric imaging is that full spectral coverage light wave converges in same picture point, can make picture more become clear and comprise abundanter information.According to above two specific characters of lobster eye, research has invented lobster eye lens.

As shown in Figure 1, lobster eye lens consists of some micro-channel tubes, and each micro-channel tubes has optical axis separately.Micro-channel tubes is the positive quadrangular frustum pyramid shaped that cone apex angle is α, four isosceles trapezoid side inner walls of positive truncated rectangular pyramids are reflecting wall, the Si Ge limit, bottom surface of positive truncated rectangular pyramids forms the outer rim of micro-channel tubes, the outer rim of each micro-channel tubes is positioned on the sphere that radius is r1, four limits of end face of positive truncated rectangular pyramids form the inner edge of micro-channel tubes, and the inner edge of each micro-channel tubes is positioned on the sphere that radius is r2.Each micro-channel tubes axis is the radius of each orientation of same spheroid, pitch orientation, and the lobster eye lens that each micro-channel tubes forms is a spheroid, and radius is r1, and certain spherical crown of this spheroid is also a kind of lobster eye lens, is called spherical crown lobster eye lens.The direct incident of incident light or by reflecting wall, reflect after imaging on image device.Lobster eye lens carries out light transmission by reflection, is imaged as real image, only has aberration on axle, there is no aberration, and visual field reaches 360 °.

As shown in Figure 2, a is the lobster eye lens of circular arrangement mode; B is the lobster eye lens of square arrangement mode.The arrangement mode of these two kinds of existing lobster eye lens micro-channel tubes is all undesirable, it is inhomogeneous that square arrangement mode can make to participate in image planes the distribution of light of imaging, and circular arrangement mode has larger space in lens space, wasted space limited on lens.Therefore,, when existing lobster ocular structure arrangement mode causes photoimaging, energy distribution is inhomogeneous and energy is lower.

Utility model content

In order to be controlled to the distribution of picture energy, obtain energy distribution image relatively uniformly, and in limited lens space more filling micro-channel tubes, the ability of harvest energy is improved, a kind of lobster eye lens of heronsbill type arrangement mode is provided.

In order to solve the problems of the technologies described above, the technical solution of the utility model is:

The lobster eye lens of heronsbill type arrangement mode has a plurality of micro-channel units, and there are polar coordinates separately at the center of each micro-channel units on whole lens face, and each micro-channel units is placed on coordinate separately:

$r=c\sqrt{n}$

Wherein r is polar coordinates radius, and θ is polar angle, and c is scale parameter.

The invention has the beneficial effects as follows, compare with existing lobster eye lens arrangement mode, the lobster eye lens of heronsbill type arrangement mode can be arranged more micro-channel tubes under equal area, effectively utilizes projectile energy; And because microchannel is in spiral-shaped arrangement, in image planes, can obtain energy distribution more uniformly, avoid producing cross picture on imaging surface.

Accompanying drawing explanation

Fig. 1 is that incident light passes through lobster eye lens imaging schematic diagram.

In Fig. 2, a is the lobster eye lens of circular arrangement mode; B is the lobster eye lens of square arrangement mode.

Fig. 3 is the lobster eye lens structural representation of heronsbill type arrangement mode.

Fig. 4 is square arrangement mode lobster eye lens energy profile on image planes region.

Fig. 5 is lobster eye lens energy profile on image planes region of heronsbill type arrangement mode.

Embodiment

As shown in Figure 3, the lobster eye lens of heronsbill type arrangement mode has a plurality of micro-channel units, and there are polar coordinates separately at the center of each micro-channel units on whole lens face, and each micro-channel units is placed on coordinate separately:

$r=c\sqrt{n}$

Wherein r is polar coordinates radius, and θ is polar angle, and c is scale parameter, and scale parameter is relevant with the marginal dimension d of microchannel, and it should meet the condition of c<0.5966d.

When lobster eye lens is arranged according to heronsbill type arrangement mode, can produce and golden section

relevant speciality.

Pareto diagram according to the lobster eye lens of heronsbill type arrangement mode meets Fibonacci sequence, on the lobster eye lens of heronsbill type arrangement mode, Hui Cong center, each microchannel starts to form two curves of two curves and extends round about, from center, start to extend to edge always, these two curves form a constant angle, this angle value is 137.5 °, puts together and has just formed spirality.This angle obtains like this:

Wherein for golden section proportion.

With the aligning method of the lobster eye lens of the above-mentioned heronsbill type of computer simulation arrangement mode, if the divergence angle beta of arranging is 137.4 °, on this lobster eye lens, between each micro-channel units, just there will be gap, and can only see one group of clockwise helix; If divergence angle beta is 137.6 °, on this lobster eye lens, between each micro-channel units, also there will be gap, can see one group of anticlockwise helix; And only have when the angle of divergence equals 137.5 °, on this lobster eye lens, between each micro-channel units, just present each other closely edge and close, do not have apertured two groups of reverse acting spiral lines.This statistical result showed, only has angle of divergence pattern of rows and columns of selecting 137.5 °, on this lobster eye lens between each micro-channel units arranged distribution just at most, the tightst and the most well-balanced.

On computers simultaneously to comprising while simulating on the disc that three kinds of lobster eye lens arrangement modes of heronsbill type are 100mm at diameter respectively, adopt heronsbill arrangement mode can arrange 17711 microchannels, much more about 15% than the lobster eye lens that adopts circular arrangement mode, than the lobster eye lens how about 2% that adopts square arrangement mode.

From simulation, can find out that sun fancy lobster eye lens obviously arranges more microchannel than circular arrangement mode under same homalographic, receive more energy.Contrast with square arrangement mode, its arranging density is without obvious raising, but the image planes energy distribution of the lobster eye lens of square arrangement mode is inhomogeneous, Fig. 4 is square arrangement mode lobster eye lens energy profile on image planes region, can find out that in the drawings energy is large on diagonal line, other region energy is few.As shown in Figure 5, adopt the energy distribution of heronsbill aligning method comparatively even.

Claims (1)

1. the lobster eye lens of heronsbill type arrangement mode, has a plurality of micro-channel units, it is characterized in that, there are polar coordinates separately at the center of each micro-channel units on whole lens face, and each micro-channel units is placed on coordinate separately:

$r=c\sqrt{n}$

Wherein r is polar coordinates radius, and θ is polar angle, and c is scale parameter.

Images