CN113074919A

CN113074919A - Focal plane target space position calibration device and method thereof

Info

Publication number: CN113074919A
Application number: CN202110465574.6A
Authority: CN
Inventors: 吴海燕; 李季; 黄达
Original assignee: Nanjing Zhongguang Intelligent Photoelectric Technology Co ltd
Current assignee: Nanjing Zhongguang Intelligent Photoelectric Technology Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-07-06

Abstract

The utility model belongs to the optical detection field, concretely relates to realize focal plane target spatial position calibration device and method, the device includes imaging lens, eyepiece, beam splitter prism, luminance facility, imaging lens, beam splitter prism and eyepiece are arranged on the horizontal direction from left right side's order, be provided with the luminance facility in the vertical direction of beam splitter prism below, beam splitter prism and luminance facility can change the light path, and light through imaging lens, the light path of change and luminance cooperates in opposite directions in order to realize the demarcation to the target. The device can calibrate and detect the focal plane space position of an optical system such as a collimator or an imaging lens; the working spectrum of the device is in a visible light range, and visual observation is carried out; belonging to focal plane adjusting equipment; the calibration method is high in calibration speed, simple in structure, strong in adaptability, low in cost, reasonable and reliable, and strong in operability.

Description

Focal plane target space position calibration device and method thereof

Technical Field

The application belongs to the field of optical detection, and particularly relates to a focal plane target space position calibration device and method.

Background

Generally, for optical instruments or equipment needing to place a reticle (target) on a focal plane, the focal plane position needs to be calibrated (the reticle center is placed at the center of an optical field of view, and the reticle is guaranteed not to be defocused at the same time), the alignment deviation of a common pentagonal prism method at the initial stage of adjustment is large, a pentagonal prism and a theodolite need to be used, the light path building and testing process is complex, the specialized requirement is high, and the requirements on the field and the stability are high; therefore, the device can realize rapid or convenient focal plane target detection or rapid and accurate debugging.

Disclosure of Invention

In view of the above disadvantages of the prior art, the technical solution of the present application is as follows:

a method for realizing a focal plane target space position calibration device,

the method comprises the following steps: designing an optical imaging system;

step two: the general eyepiece is matched, the beam splitter prism is matched, and the brightness of the changed light path is realized through the matching of the general eyepiece and the beam splitter prism;

step three: after the change, arranging light diffusion glass on a light path, and designing a light collecting facility to focus light rays with brightness on the light diffusion glass through the light collecting facility;

step four: and the calibration of the target is realized through the opposite matching of the imaging system, the changed light path and the light with the brightness.

Further, the optical imaging system is a fully symmetric imaging mirror.

Further, the matching utility eyepiece includes an entrance pupil location of the matching utility eyepiece.

Further, the changed light path includes a folded light path, and the brightness of the changed light path is implemented by the illumination light.

Furthermore, the matched beam splitter prism comprises a direct light path connected with the universal eyepiece and a turning light path connected with the illumination light.

Furthermore, the light scattering glass is ground glass, and the light collecting facility is designed to be an aspheric optical plastic light collecting mirror.

Further, the design is designed by utilizing ZEMAX software, and the light rays with the brightness adopt an LED single light column.

This application still provides a focal plane target spatial position calibration device, including imaging lens, eyepiece, beam splitter prism, luminance facility, imaging lens, beam splitter prism and eyepiece are arranged on the horizontal direction from left right side's order, be provided with the luminance facility in the vertical direction of beam splitter prism below, beam splitter prism and luminance facility can change the light path, and the light through imaging lens, the light path of change and luminance cooperates in opposite directions in order to realize the demarcation to the target.

Preferably, the imaging lens is designed, the imaging lens is a full-symmetric imaging lens, the eyepiece is a matched universal eyepiece, a direct light path of the imaging lens is communicated with the eyepiece, the light path is changed into a folded light path, the brightness facility is an LED single light column, and light emitted by the LED single light column is LED to the beam splitter prism to generate the folded light path.

Preferably, the design further comprises a light collecting lens and frosted glass which are sequentially arranged on the light path of the brightness facility to the beam splitter prism at the entrance pupil position of the universal eyepiece.

The beneficial effect of this application is as follows:

the focal plane target space position calibration device has the advantages that the working spectrum section of the device is in a visible light range, and visual observation is carried out; belonging to focal plane adjusting equipment; the calibration method is high in calibration speed, simple in structure, strong in adaptability, low in cost, reasonable and reliable, and strong in operability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:

FIG. 1 is an optical design of an imaging lens group;

FIG. 2 is a general diagram of the system optics;

FIG. 3 is a general view of the structure;

FIG. 4 is a schematic diagram of reticle focal plane position calibration;

in the figure: 1-a system to be measured, 2-an imaging mirror, 3-a beam splitter prism, 4-an eyepiece, 5-ground glass, 6-an LED, 7-a standard plane mirror and 8-a reticle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the present application provides a focal plane target spatial position calibration device, in which a fully symmetric imaging objective lens is matched with a general eyepiece and has a focal plane target spatial position calibration device with light-collecting LED illumination, and a working spectrum is in a visible light range, and is observed visually, and a USB interface supplies power.

The structure comprises an imaging lens 2, an ocular lens 4, a beam splitter prism 3 and a brightness facility 6, wherein the imaging lens 2, the beam splitter prism 3 and the ocular lens 4 are sequentially arranged in the horizontal direction from left to right, the brightness facility 6 is arranged in the vertical direction below the beam splitter prism 3, the beam splitter prism 3 and the brightness facility 6 can change the light path, and the calibration of a target is realized through the opposite matching of the imaging lens 2, the changed light path and the light rays with brightness; the imaging mirror 2 form through the design, imaging mirror 2 is the holohedral symmetry imaging mirror, eyepiece 4 is for matching general type, imaging mirror 2's direct light path switch-on is with type eyepiece, it is the light path of turning over to change the light path, the luminance facility is LED 6 single light column, the light that LED 6 single light column sent leads to beam splitter prism and produces the light path of turning over, the design still includes the entrance pupil position at general type eyepiece, the light path that the luminance facility leads to beam splitter prism has set gradually collecting mirror and frosted glass 5 or opal glass.

The focal plane target space position calibration device further comprises a standard plane mirror 7, a tested system 1 and a reticle 8, wherein the standard plane mirror 7, the tested system 1 and the reticle 8 are sequentially arranged at the front end of the imaging mirror in the horizontal direction for implementation to realize testing.

A method for realizing a focal plane target space position calibration device comprises the following steps: the method comprises the following steps: designing an optical imaging system; step two: the general eyepiece is matched, the beam splitter prism is matched, and the brightness of the changed light path is realized through the matching of the general eyepiece and the beam splitter prism; step three: after the change, arranging light diffusion glass on a light path, and designing a light collecting facility to focus light rays with brightness on the light diffusion glass through the light collecting facility; step four: and the calibration of the target is realized through the opposite matching of the imaging system, the changed light path and the light with the brightness.

The more detailed steps are as follows: an optical imaging system (a full-symmetry imaging lens) is designed by utilizing ZEMAX software, and the entrance pupil position of the universal eyepiece is matched; a beam splitter prism (the splitting ratio is optional) is used, a straight light path is connected with a universal eyepiece, and the light path is converted to be communicated with illumination light; frosted glass (concentrating the illumination energy as much as possible) is placed at the exit pupil position of the folded illumination light splitting path; step two: an aspheric optical plastic condenser is designed by utilizing ZEMAX software and used for focusing an LED single light column on ground glass; step three: designing a mechanical structure by using AUTOCAD software; step four: manufacturing and assembly testing.

The method can quickly calibrate the position of the reticle or detect and probe whether the mounted reticle is out of focus or deviated from the optical center.

The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A method for realizing a focal plane target space position calibration device is characterized in that,

the method comprises the following steps: designing an optical imaging system;

2. The method for realizing the device for calibrating the spatial position of the focal plane target according to claim 1, wherein the optical imaging system is a fully symmetric imaging mirror.

3. The method of claim 1, wherein the matching of the universal eyepiece comprises matching an entrance pupil position of the universal eyepiece.

4. The method according to claim 1, wherein the changed optical path comprises a folded optical path, and the brightness of the changed optical path is implemented by the illumination light.

5. The method of claim 1, wherein the matching beam splitter prism comprises a straight path connecting to a universal eyepiece and a folded path connecting to the illumination light.

6. The method for calibrating the spatial position of the focal plane target according to claim 5, wherein the light-scattering glass is ground glass, and the light-collecting means is aspheric optical plastic light-collecting lens.

7. The method for realizing the device for calibrating the spatial position of the focal plane target as claimed in any one of claims 1 to 6, wherein the design is designed by ZEMAX software, and the light rays with the brightness adopt an LED single light column.

8. The utility model provides a focal plane target spatial position calibration device, its characterized in that, includes imaging mirror, eyepiece, beam splitter prism, luminance facility, imaging mirror, beam splitter prism and eyepiece arrange on the horizontal direction from left right side's order, be provided with the luminance facility in the vertical direction of beam splitter prism below, beam splitter prism and luminance facility can change the light path, and the light through imaging mirror, the light path of change and luminance cooperates in opposite directions in order to realize the demarcation to the target.

9. The device for calibrating the spatial position of the focal plane target according to claim 8, wherein the imaging lens is designed to be a fully symmetric imaging lens, the eyepiece is a universal-type, a through-path-connecting eyepiece of the imaging lens is used, the light path is changed to be a folded light path, the brightness device is an LED single light column, and light emitted from the LED single light column is LED to the beam splitter prism to generate the folded light path.

10. The device for calibrating the spatial position of the focal plane target according to claim 9, wherein the design further comprises a condenser and a frosted glass sequentially arranged on the light path of the brightness facility to the beam splitter prism at the entrance pupil position of the universal eyepiece.