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Annule type aplanatic spherical lens

A spherical lens and aplanatic technology, applied in optical components, optics, instruments, etc., can solve the problems of complex processing of aspheric lenses, limited imaging quality, and high cost

Active Publication Date: 2009-09-02
CHINA NORTH IND NO 205 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The processing of spherical lens is simpler than that of aspheric surface, and the cost is low, but the imaging quality is limited when the number of lenses is small; the imaging quality of aspheric lens is better, and the structure of optical system can be simplified by using it, but the processing of aspheric lens is complicated. higher cost

Method used

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  • Annule type aplanatic spherical lens
  • Annule type aplanatic spherical lens
  • Annule type aplanatic spherical lens

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Embodiment Construction

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0037] The first preferred embodiment: Suppose it is required to design a lens with f=60, F=3.75 and spherical aberration less than 0.30.

[0038] First, according to the above design requirements, a plano-convex lens with structural parameters as shown in Table 1 is selected as the basic lens of this preferred embodiment, and the convex surface is the light incident surface. Table 2 lists the spherical aberration values ​​when a beam of monochromatic parallel light (λ=587.5618nm) passes through the plano-convex lens, and its spherical aberration curve can be found in figure 2 , for point plots on the axis see Figure 5 , the optical transfer function curve see Figure 8 .

[0039] Table 1 Structural parameters of plano-convex lenses

[0040] serial number

radius

center thickness

Effective caliber

Glass ...

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Abstract

An endless belt aplanatic spherical surface lens, the characteristic is: divides the two spherical surfaces the spherical surface simple lens into N endless belts with different caliber, every endless belt processes translation relative the base spherical surface along the light axis on the same spherical surface, the translation distance is descending in turn from smaller endless belt to the bigger endless belt, confirms the value of N, the caliber of every endless belt and the translation quantity of every endless belt on the axis direction according to the aplanatic requirement of the practice application. The advantages of the invention are: for the light paralleling with the light axis can get the better aplanatic revise result; the surface structure of the lens is sample.

Description

technical field [0001] The invention belongs to the field of optical elements, and mainly relates to a single spherical lens, in particular to a single spherical lens with an aplanatic ring zone. technical background [0002] Spherical aberration is the most basic type of aberration in the optical system. It is caused by the fact that all the light emitted by a point no longer converges into a point after passing through the optical element or the optical system. When there is spherical aberration in the optical system, a point on the optical axis will form a diffuse spot on the image plane, which seriously affects the imaging quality of the optical system. Therefore, various optical systems need to correct for spherical aberration. In many optical instruments that require small size and simple structure, such as microscopes, telescopes, and CD / DVD optical heads, relatively simple aplanatic lenses are often used to correct spherical aberration in the system. In the prior a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00
Inventor 胡博焦明印
Owner CHINA NORTH IND NO 205 RES INST
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