Microscope phase contrast objective lens

A microscope and phase contrast technology, applied in the field of optical imaging, can solve the problems of long total length of the objective optical system, high cost of lens material, and insufficient magnification, and achieve the effect of ensuring optical performance, good optical performance, and a small number of lenses

Pending Publication Date: 2021-08-06
MOTIC CHINA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the magnification is not small enough, the field of view is not large enough, and the longitudinal chromatic aberration is large, and only the C' line 643.847nm to the F' line 479.991nm is considered
[0004] There is also a patent that discloses a microscope objective lens (authorized announcement number KR10-1850999), which describes a 50-fold phase contrast objective lens composed of 17 lenses, but the magnification used is not small enough and the number of lenses is large , The cost of lens material is high, and the total length of the objective optical system is too long

Method used

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  • Microscope phase contrast objective lens
  • Microscope phase contrast objective lens
  • Microscope phase contrast objective lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] like figure 1As shown, the microscope phase contrast objective lens of Embodiment 1 includes an object surface 700, a cover glass 701, a first lens group 81 and a second lens group 82, wherein the first lens group 81 includes a first lens 711 with positive refractive power, The second lens 712 of negative refractive power, the third lens 713 of negative refractive power, the fourth lens 714 of positive refractive power, the fifth lens 715 of positive refractive power, the sixth lens 716 of negative refractive power and the seventh lens 717 of positive refractive power; 711 The surface facing the object side is the first lens first surface 7111, and the surface facing the image side is the first lens second surface 7112; the second lens 712 facing the object side is the second lens first surface 7121, facing the image side The surface of the third lens 713 is the second surface 7122 of the second lens; the surface of the third lens 713 facing the object side is the first...

Embodiment 2

[0110] like Image 6 As shown, the second embodiment also includes the first lens group 81, the second lens group 82, the third lens group 83, the first lens 711, the second lens 712, the third lens 713, the fourth lens 714, the first lens Five lenses 715, sixth lens 716, seventh lens 717, phase plate glass one 721, phase plate glass two 722, and eighth lens 723. The difference is that the material of the first lens 711 is selected, and the optical parameters of each lens are the same as the embodiment One exists differently.

[0111]Specifically, in the phase contrast objective optical system of the second embodiment, the field of view is 25mm, the longitudinal chromatic aberration defined by the focal position deviation between C-e is 0.77 times of the focal depth, and the longitudinal chromatic aberration defined by the focal position deviation between g-e Chromatic aberration is 0.71 times the depth of focus, where C is 656.27nm, g is 435.84nm, and e is 546.07nm. The dep...

Embodiment 3

[0134] like Figure 11 As shown, the phase contrast objective optical system in the third embodiment also includes a first lens group 81, a second lens group 82, a third lens group 83, a first lens 711, a second lens 712, a third lens 713, The fourth lens 714, the fifth lens 715, the sixth lens 716, the seventh lens 717, the phase glass one 721, the phase glass two 722, and the eighth lens 723, the difference is that the material of the first lens 711 is selected, and each lens There are some differences in the optical parameters of Example 2.

[0135] Specifically, in the phase contrast objective optical system of the second embodiment, the field of view is 25 mm, the longitudinal chromatic aberration defined by the focus position deviation between C-e is 0.70 times the focal depth, and the longitudinal chromatic aberration defined by the focus position deviation between g-e Chromatic aberration is 0.68 times the depth of focus, where C is 656.27nm, g is 435.84nm, and e is 5...

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Abstract

The invention relates to the technical field of optical imaging, and discloses a microscope phase contrast objective lens, which comprises a first lens group with positive refractive power, a second lens group with positive refractive power, an object plane and a cover glass, the absolute value of the refractive power of the first lens group is greater than the absolute value of the refractive power of the second lens group. The first lens group and the second lens group in the phase contrast objective lens optical system are arranged, and the focus distance, the refractive index, the Abbe number and the thickness of the first lens group and the second lens group are limited, so that the field curvature, the distortion and the aberration sensitivity of the phase contrast objective lens optical system are further improved; and therefore, the optical performance of the phase contrast objective lens optical system is ensured, and the objective lens optical system has the characteristics of small magnification, large numerical aperture, high resolution performance, small chromatic aberration under a large field of view, small number of lenses and short total length of the objective lens optical system.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a microscope phase contrast objective lens. Background technique [0002] With the rapid development of the biological industry in recent years, there is an increasing demand for observing transparent sections. The observation requirements are met by using the microscope phase contrast method. Generally speaking, due to the long working distance required for medical detection, it is necessary to make the microscope Observation of more details, large numerical aperture, observation of transparent slices, and a phase contrast phase plate, which means that the back focus of the lens or lens group must converge on the phase plate. For such a phase contrast objective optical system, the axial image It is very difficult to compensate for aberration, chromatic aberration of magnification, and field curvature, and it is even more difficult to control the aberration of an objectiv...

Claims

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Application Information

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IPC IPC(8): G02B21/02
CPCG02B21/02
Inventor 方政林顺华段立新
Owner MOTIC CHINA GRP CO LTD
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