Mr. Zhijun Han Profile

Zhijun Han

at Beijing Institute of Space Mechanics & Electricity

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 30 April 2024 Paper

Optical and radar common aperture composite detection technology

Zemin Zhang, Yaxin Chen, Zhou Wang, Baohui Han, Li Tian, Ziyang Han, Zhijun Han, Xiaosen Liu

Proceedings Volume 13156, 131560S (2024) https://doi.org/10.1117/12.3016432

Read Abstract +

The Optical system has the advantages of high resolution and clear texture, but it has the disadvantages of being unable to penetrate clouds and fog, and being unable to all-weather imaging. The radar has the advantages of ranging, velocity measurement, all-day time, all- weather, etc., but it has the advantages of obvious spots, unclear texture and low resolution. The technology combines the optical with radar organically, learns from each other, realizes composite imaging, and can take into account the requirements of high resolution, ranging, velocity measurement and all-sky time. The design of optical and radar common aperture to realize integrated composite detection has the advantages of the sane imaging time, the same observation conditions, and real-time composite monitoring of moving targets. In addition, it also has the advantages of high accuracy of dual-channel matching association, dual-channel high-precision pointing association, high-precision fusion, high-precision three-dimensional information acquisition, and small volume and weight, and can also meet the needs of fine (resolution and positioning accuracy) intelligence perception under all-day and all-weather conditions in key areas, significantly improving the comprehensive detection efficiency.

Proceedings Article | 27 March 2022 Paper

Application of coordinate measuring distance between the opera mirror in the optical systems

Ning Zhang, Haiyang Sun, Jie Bai, Jingjian Bi, Zhijun Han

Proceedings Volume 12169, 121690W (2022) https://doi.org/10.1117/12.2620755

KEYWORDS: Mirrors, Imaging systems, Cameras, Distance measurement, Image processing, Space mirrors, Error analysis

Read Abstract +

In order to solve the systemic problems such as the large actual error, low efficiency, and difficult direction control in the measurement of the distance between the mirrors in the traditional optical system, the problems of the traditional measurement method are briefly analyzed, and the actual position of the measured parts and the parts measured by the three coordinate measuring machine are analyzed briefly. The method of comparing the position of the theoretical optical model can establish the relationship between the actual optical system and the primary theoretical optical model. Through the angle deviation and the relevant size deviation, the deviation of each component position can be obtained by reverse calculation. This article mainly introduces the mirror The three-coordinate measurement method for key dimensions and angles of the distance. Taking the measurement of the distance between the mirrors of a camera as an example, the application of the three-coordinate measurement method is explained. The deviation of the angle of the focal plane bracket and the three-mirror bracket from the theory is less than 0.01°. The high-precision and high-efficiency assembly and adjustment of the camera optical path imaging system is realized. The results show that the application of the three coordinate measurement method has a good effect.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years