Object lens of microscope

A microscope objective lens and lens group technology, applied in the microscope field, can solve the problems of excessive thickness and refractive index changes, affecting the quality of microscope imaging, etc., and achieve the effect of clear imaging

Active Publication Date: 2015-12-09
NINGBO SUNNY INSTR
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the thickness and refractive index of the medium ch

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Object lens of microscope
  • Object lens of microscope
  • Object lens of microscope

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0055] Example 1

[0056] See figure 1 , The microscope objective lens of embodiment 1 of the present invention includes, from the object side, a first lens L1 with positive refractive power, a first lens group G1 with positive refractive power, a second lens group G5 with positive refractive power, and a second lens group G5 with positive refractive power. The third lens group G2 with negative power, the fourth lens group G3 with negative power, and the fifth lens group G4 with negative power. The first lens group G1 is used to move along the optical axis of the objective lens to change the focal length of the objective lens.

[0057] In use, the specimen is set on the object side S1 of medium O (such as a cover glass), and the light reflected by the specimen is projected on the image side S2 of medium O, and then enters the microscope objective lens and the tube lens set on the mirror side of the microscope object enters the observer’s Eyes or image sensors (not shown). When me...

Example Embodiment

[0103] Example 2

[0104] Please refer Image 6 The microscope objective of Example 2 of the present invention is basically the same as the microscope objective of Example 1. However, the fifth lens group G4 of the microscope objective of Example 2 includes a fourth lens L4, and correspondingly, the surface number of the microscope objective is changed.

[0105] In addition, in Example 2, the microscope objective meets the conditions in the following table:

[0106] table 3

[0107] Surface

[0108] In addition, the microscope objective also satisfies:

[0109] Table 4

[0110] D1

[0111] Among them, fobj=1; NA=0.45. 〡fL1 / fobj〡=2.1; 〡fG1 / fobj〡=10.2; 〡fG2 / fobj=16.6 and 〡fG5 / fobj=2.6.

[0112] Figure 7 This is the 0-field lateral aberration diagram of the microscope objective lens of Example 2, where the abscissa PY and PX represent the entrance pupil, and the ordinate EY and EX represent the lateral aberration (Y represents the meridian direction and X represents the sagittal dire...

Example Embodiment

[0116] Example 3

[0117] Please refer Picture 11 The microscope objective of Example 3 of the present invention is basically the same as the microscope objective of Example 1. However, the second lens group G5 of the microscope objective of Example 3 includes the second lens L2, and correspondingly, the surface number of the microscope objective is changed.

[0118] In addition, in Example 3, the microscope objective meets the conditions in the following table:

[0119] table 5

[0120] Surface

[0121] In addition, the microscope objective also satisfies:

[0122] Table 6

[0123] D1

[0124] Among them, fobj=1; NA=0.45. 〡fL1 / fobj〡=2.2; 〡fG1 / fobj〡=13.4; 〡fG2 / fobj=11 and 〡fG5 / fobj=3.8.

[0125] Picture 12 This is the 0-field lateral aberration diagram of the microscope objective lens of Example 3. The abscissa PY and PX represent the entrance pupil, and the ordinate EY and EX represent the lateral aberration (Y represents the meridian direction and X represents the sagittal dire...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an object lens of a microscope. The object lens successively comprises a first lens positive in focal power, a first lens unit positive in focal power, a second lens unit positive in focal power, a third lens unit negative in focal power, a fourth lens unit negative in focal power and a fifth lens unit negative in focal power from the object side. The first lens unit is used for moving along an optical axis of the object lens of the microscope so as to change the focal length of the object lens of the microscope. According to the invention, by moving the first lens unit, the focal length of the object lens of the microscope can be changed, thereby compensating the thickness of covering media and the refractive index change to obtain a clear image.

Description

technical field [0001] The invention relates to microscope technology, in particular to a microscope objective lens. Background technique [0002] At present, when using a microscope to observe a specimen, the specimen is generally covered with a medium such as a cover glass, a petri dish or a specific liquid, that is to say, a medium is set between the specimen and the objective lens of the microscope. In this way, the specimen is projected onto the upper surface of the medium and imaged under magnification through the microscope. Since the microscope generally has a fixed focal length, the thickness and refractive index of the medium also need to be fixed. Of course, depending on the magnification and numerical aperture of the microscope objective lens, the thickness and refractive index of the medium can vary slightly. However, if the thickness and refractive index of the medium change too much, it will affect the quality of microscope imaging. The higher the magnifica...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G02B21/02G02B13/00
Inventor 李伸朋
Owner NINGBO SUNNY INSTR
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products