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100*CaF2-excluding plan apochromatic metallographic microobjective

A microscopic objective lens and apochromatic technology, applied in microscopes, optics, instruments, etc., can solve the problem of high cost and achieve low cost, broad application prospects, commercial value, and high cost performance

Inactive Publication Date: 2011-09-28
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of CaF 2 It is made of materials and the number of lenses is still large, so there is also a problem of relatively high cost

Method used

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  • 100*CaF2-excluding plan apochromatic metallographic microobjective
  • 100*CaF2-excluding plan apochromatic metallographic microobjective
  • 100*CaF2-excluding plan apochromatic metallographic microobjective

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] according to figure 1 The shown 100× plan apochromatic metallographic microscope objective lens of the present invention is composed of 7 convex-concave lenses and 1 Qiming thick meniscus lens 9 with different mirror surface shapes and radii of curvature. The structure is divided into The three light groups that are separated far away, in order, the light group one at the imaging end is composed of doublet convex lens 2 and concave lens 3; the light group two is two sets of doublet lens groups with a short distance, one of which is doublet Concave lens 4 and convex lens 5, another group is double cemented concave lens 6 and convex lens 7; Light group three is formed by the combination of convex lens 8 and Qiming thick meniscus lens 9; Each lens of these three light groups is coaxial with object plane 10 centers, The combination constitutes a 100×plan...

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Abstract

The invention discloses a 100*CaF2-excluding plan apochromatic metallographic microobjective which comprises lenses. The metallographic microobjective is characterized by being composed of eight lenses which are divided into three light sets and arranged coaxially; the lenses comprise a convex lens, a concave lens, a concave lens, a convex lens, a concave lens, a convex lens, a convex lens and an aplanatic thick meniscus lens which are sequentially connected; and the lenses do not contain CaF2. Compared with the domestic and overseas similar objectives, the microobjective disclosed by the invention has the advantages of no CaF2, less lenses, simple structure and assembling and adjusting processes, low cost, high performance-price ratio, and the like; and the performance indexes of the microobjective are better than those of the existing CaF2-containing similar objectives made of TF3 special glass, therefore, the microobjective disclosed by the invention has the advantages of broad application prospect and high commercial value.

Description

technical field [0001] The present invention relates to metallographic microscope objective lens, especially less lens number, no CaF 2 A 100× plan apochromatic metallographic microscope objective. Background technique [0002] Microscopic objective lens is an important component of metallographic microscope. The quality of its imaging directly affects the performance of metallographic microscope. In order to obtain high-quality pixels, it is necessary to correct axial chromatic aberration and secondary spectrum in the objective lens at the same time. To achieve this, the conventional method is to introduce low refractive index and low dispersion optical crystals into some positive lenses, such as Calcium Fluoride (CaF 2 ) etc. as dielectric materials, but such materials are brittle, susceptible to moisture, unstable in physical and chemical properties, and large-sized materials are difficult to obtain, and the introduction of such optical crystals also complicates the man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B21/02G02B21/00G02B1/00
Inventor 萧泽新王民强
Owner GUILIN UNIV OF ELECTRONIC TECH
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