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A high-precision objective lens parfocal detection device and detection method

A kind of testing equipment and high-precision technology, which is used in the testing of machine/structural components, measuring devices, optical instrument testing, etc. Effects of multi-function operation

Active Publication Date: 2019-04-12
MOTIC CHINA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention can solve many problems such as low precision of existing instruments and complicated operation procedures, and the algorithm used is relatively simple compared with existing ones.

Method used

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  • A high-precision objective lens parfocal detection device and detection method
  • A high-precision objective lens parfocal detection device and detection method
  • A high-precision objective lens parfocal detection device and detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] figure 1 It is the general assembly drawing of the upright digital observation device of this device. As shown in the figure, the detection intermediate 2 includes an epi-bright field coaxial projection system and an oblique imaging system. The standard reticle of the coaxial projection system is placed perpendicular to the optical axis, and the image sensor of the oblique imaging system is placed oblique to the optical axis. Through the algorithm of the image sensor itself, the value can be directly read on the display screen 1, thereby realizing the detection of the parfocal distance. The bracket 4 can be positioned at different parfocal distances, and has a porous objective lens converter, which facilitates the detection of multiple objective lenses. The electrical control group is fixed inside the frame 3 in a built-in manner, which greatly simplifies the wiring of external electric wires inside the frame to achieve the purpose of safety and beauty. The standard re...

Embodiment 2

[0079] image 3 It is the general assembly drawing of this device for vertical visual observation. As shown in the figure, the detection intermediate 2a contains an epi-bright field coaxial projection system and an oblique imaging system. The standard reticle of the field coaxial projection system is placed obliquely on the optical axis, and the image sensor of the imaging system is placed vertically on the optical axis. The value can be directly interpreted through the visual head 1a, or it can be connected to a computer to directly read the value on the display screen. The observation mode is selected according to user needs. Bracket 4 can be positioned at different parfocal distances, and has a multi-hole converter to facilitate the detection of multiple objective lenses. The electrical control group is fixed inside the frame 3 in a built-in manner, which greatly simplifies the wiring of external electric wires inside the frame to achieve the purpose of safety and beauty. ...

Embodiment 3

[0090] Figure 5 It is the general assembly drawing of the inverted digital observation device, as shown in the figure, the objective lens is installed on the base 5a porous nosepiece, the bracket 4b is connected to the standard reflector, and can be positioned at different parfocal distances, convenient for various types Inspection of the objective lens. The detection intermediate adopts a built-in design, which is built into the base 5a, and contains an epi-brightfield coaxial projection system and an imaging system. The standard reticle of the coaxial projection system is placed vertically to the optical axis, and the image sensor of the imaging system is inclined to light. Axis placement, through the algorithm of the image sensor itself, the value can be read directly on the display screen 1b, so as to realize the detection of the parfocal distance. The electrical control group is fixed inside the frame 3a in a built-in manner.

[0091] Next, the specific implementation ...

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Abstract

The invention relates to the optical field and discloses a high-precision objective lens parfocal detection device and a detection method. The high-precision objective lens parfocal detection device comprises a machine frame, a standard reflector specimen, a support frame, an objective lens connector, a detection middle body, a data processing output device and the like. The detection middle body comprises a projection system and an imaging system. A reticle in the projection system and an image sensor in the imaging system are in a conjugate relation. When the reticle is placed vertical to an optical axis, the image sensor is inclined relative to the optical axis; when the reticle is inclined relative to the optical axis, the image sensor is placed vertical to the optical axis; and under different parfocal distances, the focusing positions on the image sensor are different, and by means of data processing, specific parfocal values are obtained, so that the purpose of parfocal distance detection is realized. The device has the advantages that the structure is simple, and an observer can carry out parfocal distance detection on the objective lenses of different types without the need of changing the machine frame, so that the simple main body is provided with a plurality of mode detection functions, and the universality of the product is greatly improved.

Description

technical field [0001] The invention relates to the field of optical instrument detection, in particular to a high-precision objective lens parfocal detection device and detection method. Background technique [0002] In the design and manufacture of modern biological microscopes, in order to improve the work efficiency of users, it is generally required to meet the parfocal design, that is, for all objective lenses, their conjugate distances are equal. In this way, when changing objective lenses of different magnifications, there is no need to adjust the focus separately, that is, during microscope inspection, when the image is observed clearly with an objective lens of a certain magnification, the image should be basically clear when switching to an objective lens of another magnification. However, due to manufacturing errors, the conjugate distances between the object images of each objective lens cannot be absolutely equal, and there will always be some deviations. Ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
CPCG01M11/0207G01M11/0214G01M11/0221
Inventor 夏波邬明慧
Owner MOTIC CHINA GRP CO LTD
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